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Commit 6def8cf5 authored by Poul-Henning Kamp's avatar Poul-Henning Kamp
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Move the main table of parameters to its own source code before 

starting surgery on parameter defaults.
parent 0e9627dd
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Showing with 626 additions and 569 deletions
bin/varnishd/Makefile.am
View file @ 6def8cf5
......@@ -61,6 +61,7 @@ varnishd_SOURCES = \
mgt/mgt_cli.c \
mgt/mgt_main.c \
mgt/mgt_param.c \
mgt/mgt_param_tbl.c \
mgt/mgt_param_bits.c \
mgt/mgt_pool.c \
mgt/mgt_sandbox.c \
......
bin/varnishd/mgt/mgt_param.c
View file @ 6def8cf5
......@@ -53,7 +53,6 @@
#include "mgt_cli.h"
#define MAGIC_INIT_STRING "\001"
struct params mgt_param;
static int nparspec;
static struct parspec const ** parspecs;
......@@ -93,7 +92,7 @@ tweak_generic_timeout(struct cli *cli, volatile unsigned *dst, const char *arg)
/*--------------------------------------------------------------------*/
static void
void
tweak_timeout(struct cli *cli, const struct parspec *par, const char *arg)
{
volatile unsigned *dest;
......@@ -149,7 +148,7 @@ tweak_timeout_double(struct cli *cli, const struct parspec *par,
/*--------------------------------------------------------------------*/
static void
void
tweak_generic_double(struct cli *cli, const struct parspec *par,
const char *arg)
{
......@@ -219,7 +218,7 @@ tweak_generic_bool(struct cli *cli, volatile unsigned *dest, const char *arg)
/*--------------------------------------------------------------------*/
static void
void
tweak_bool(struct cli *cli, const struct parspec *par, const char *arg)
{
volatile unsigned *dest;
......@@ -363,7 +362,7 @@ tweak_bytes(struct cli *cli, const struct parspec *par, const char *arg)
/*--------------------------------------------------------------------*/
static void
void
tweak_bytes_u(struct cli *cli, const struct parspec *par, const char *arg)
{
volatile unsigned *d1;
......@@ -385,7 +384,7 @@ tweak_bytes_u(struct cli *cli, const struct parspec *par, const char *arg)
* XXX: The magic init string is a hack for this.
*/
static void
void
tweak_user(struct cli *cli, const struct parspec *par, const char *arg)
{
struct passwd *pw;
......@@ -426,7 +425,7 @@ tweak_user(struct cli *cli, const struct parspec *par, const char *arg)
* XXX: see comment for tweak_user, same thing here.
*/
static void
void
tweak_group(struct cli *cli, const struct parspec *par, const char *arg)
{
struct group *gr;
......@@ -473,7 +472,7 @@ clean_listen_sock_head(struct listen_sock_head *lsh)
}
}
static void
void
tweak_listen_address(struct cli *cli, const struct parspec *par,
const char *arg)
{
......@@ -551,7 +550,7 @@ tweak_listen_address(struct cli *cli, const struct parspec *par,
/*--------------------------------------------------------------------*/
static void
void
tweak_string(struct cli *cli, const struct parspec *par, const char *arg)
{
char **p = TRUST_ME(par->priv);
......@@ -567,7 +566,7 @@ tweak_string(struct cli *cli, const struct parspec *par, const char *arg)
/*--------------------------------------------------------------------*/
static void
void
tweak_waiter(struct cli *cli, const struct parspec *par, const char *arg)
{
......@@ -578,7 +577,7 @@ tweak_waiter(struct cli *cli, const struct parspec *par, const char *arg)
/*--------------------------------------------------------------------*/
static void
void
tweak_poolparam(struct cli *cli, const struct parspec *par, const char *arg)
{
volatile struct poolparam *pp, px;
......@@ -655,563 +654,6 @@ tweak_poolparam(struct cli *cli, const struct parspec *par, const char *arg)
#define PROTECTED_TEXT \
"\nNB: This parameter is protected and can not be changed."
#define MEMPOOL_TEXT \
"The three numbers are:\n" \
" min_pool -- minimum size of free pool.\n" \
" max_pool -- maximum size of free pool.\n" \
" max_age -- max age of free element.\n"
/*
* Remember to update varnishd.1 whenever you add / remove a parameter or
* change its default value.
* XXX: we should generate the relevant section of varnishd.1 from here.
*/
static const struct parspec input_parspec[] = {
{ "user", tweak_user, NULL, 0, 0,
"The unprivileged user to run as. Setting this will "
"also set \"group\" to the specified user's primary group.",
MUST_RESTART,
MAGIC_INIT_STRING },
{ "group", tweak_group, NULL, 0, 0,
"The unprivileged group to run as.",
MUST_RESTART,
MAGIC_INIT_STRING },
{ "default_ttl", tweak_timeout_double, &mgt_param.default_ttl,
0, UINT_MAX,
"The TTL assigned to objects if neither the backend nor "
"the VCL code assigns one.\n"
"Objects already cached will not be affected by changes "
"made until they are fetched from the backend again.\n"
"To force an immediate effect at the expense of a total "
"flush of the cache use \"ban obj.http.date ~ .\"",
0,
"120", "seconds" },
{ "workspace_client",
tweak_bytes_u, &mgt_param.workspace_client, 3072, UINT_MAX,
"Bytes of HTTP protocol workspace for clients HTTP req/resp."
" If larger than 4k, use a multiple of 4k for VM efficiency.",
DELAYED_EFFECT,
"64k", "bytes" },
{ "workspace_backend",
tweak_bytes_u, &mgt_param.workspace_backend, 1024, UINT_MAX,
"Bytes of HTTP protocol workspace for backend HTTP req/resp."
" If larger than 4k, use a multiple of 4k for VM efficiency.",
DELAYED_EFFECT,
"64k", "bytes" },
{ "workspace_thread",
tweak_bytes_u, &mgt_param.workspace_thread, 256, 8192,
"Bytes of auxillary workspace per thread.\n"
"This workspace is used for certain temporary data structures"
" during the operation of a worker thread.\n"
"One use is for the io-vectors for writing requests and"
" responses to sockets, having too little space will"
" result in more writev(2) system calls, having too much"
" just wastes the space.\n",
DELAYED_EFFECT,
"2048", "bytes" },
{ "http_req_hdr_len",
tweak_bytes_u, &mgt_param.http_req_hdr_len,
40, UINT_MAX,
"Maximum length of any HTTP client request header we will "
"allow. The limit is inclusive its continuation lines.\n",
0,
"8k", "bytes" },
{ "http_req_size",
tweak_bytes_u, &mgt_param.http_req_size,
256, UINT_MAX,
"Maximum number of bytes of HTTP client request we will deal "
"with. This is a limit on all bytes up to the double blank "
"line which ends the HTTP request.\n"
"The memory for the request is allocated from the client "
"workspace (param: workspace_client) and this parameter limits "
"how much of that the request is allowed to take up.",
0,
"32k", "bytes" },
{ "http_resp_hdr_len",
tweak_bytes_u, &mgt_param.http_resp_hdr_len,
40, UINT_MAX,
"Maximum length of any HTTP backend response header we will "
"allow. The limit is inclusive its continuation lines.\n",
0,
"8k", "bytes" },
{ "http_resp_size",
tweak_bytes_u, &mgt_param.http_resp_size,
256, UINT_MAX,
"Maximum number of bytes of HTTP backend resonse we will deal "
"with. This is a limit on all bytes up to the double blank "
"line which ends the HTTP request.\n"
"The memory for the request is allocated from the worker "
"workspace (param: thread_pool_workspace) and this parameter "
"limits how much of that the request is allowed to take up.",
0,
"32k", "bytes" },
{ "http_max_hdr", tweak_uint, &mgt_param.http_max_hdr, 32, 65535,
"Maximum number of HTTP headers we will deal with in "
"client request or backend reponses. "
"Note that the first line occupies five header fields.\n"
"This parameter does not influence storage consumption, "
"objects allocate exact space for the headers they store.\n",
0,
"64", "header lines" },
{ "vsl_buffer",
tweak_bytes_u, &mgt_param.vsl_buffer, 1024, UINT_MAX,
"Bytes of (req-/backend-)workspace dedicated to buffering"
" VSL records.\n"
"At a bare minimum, this must be longer than"
" the longest HTTP header to be logged.\n"
"Setting this too high costs memory, setting it too low"
" will cause more VSL flushes and likely increase"
" lock-contention on the VSL mutex.\n"
"Minimum is 1k bytes.",
0,
"4k", "bytes" },
{ "shm_reclen",
tweak_bytes_u, &mgt_param.shm_reclen, 16, 65535,
"Maximum number of bytes in SHM log record.\n"
"Maximum is 65535 bytes.",
0,
"255", "bytes" },
{ "default_grace", tweak_timeout_double, &mgt_param.default_grace,
0, UINT_MAX,
"Default grace period. We will deliver an object "
"this long after it has expired, provided another thread "
"is attempting to get a new copy.\n"
"Objects already cached will not be affected by changes "
"made until they are fetched from the backend again.\n",
DELAYED_EFFECT,
"10", "seconds" },
{ "default_keep", tweak_timeout_double, &mgt_param.default_keep,
0, UINT_MAX,
"Default keep period. We will keep a useless object "
"around this long, making it available for conditional "
"backend fetches. "
"That means that the object will be removed from the "
"cache at the end of ttl+grace+keep.",
DELAYED_EFFECT,
"0", "seconds" },
{ "timeout_idle", tweak_timeout_double, &mgt_param.timeout_idle,
0, UINT_MAX,
"Idle timeout for client connections.\n"
"A connection is considered idle, until we receive"
" a non-white-space character on it.",
0,
"5", "seconds" },
{ "timeout_req", tweak_timeout_double, &mgt_param.timeout_req,
0, UINT_MAX,
"Max time to receive clients request header, measured"
" from first non-white-space character to double CRNL.",
0,
"2", "seconds" },
{ "expiry_sleep", tweak_timeout_double, &mgt_param.expiry_sleep, 0, 60,
"How long the expiry thread sleeps when there is nothing "
"for it to do.\n",
0,
"1", "seconds" },
{ "pipe_timeout", tweak_timeout, &mgt_param.pipe_timeout, 0, 0,
"Idle timeout for PIPE sessions. "
"If nothing have been received in either direction for "
"this many seconds, the session is closed.\n",
0,
"60", "seconds" },
{ "send_timeout", tweak_timeout, &mgt_param.send_timeout, 0, 0,
"Send timeout for client connections. "
"If the HTTP response hasn't been transmitted in this many\n"
"seconds the session is closed. \n"
"See setsockopt(2) under SO_SNDTIMEO for more information.",
DELAYED_EFFECT,
"600", "seconds" },
{ "idle_send_timeout", tweak_timeout, &mgt_param.idle_send_timeout,
0, 0,
"Time to wait with no data sent. "
"If no data has been transmitted in this many\n"
"seconds the session is closed. \n"
"See setsockopt(2) under SO_SNDTIMEO for more information.",
DELAYED_EFFECT,
"60", "seconds" },
{ "auto_restart", tweak_bool, &mgt_param.auto_restart, 0, 0,
"Restart child process automatically if it dies.\n",
0,
"on", "bool" },
{ "nuke_limit",
tweak_uint, &mgt_param.nuke_limit, 0, UINT_MAX,
"Maximum number of objects we attempt to nuke in order"
"to make space for a object body.",
EXPERIMENTAL,
"50", "allocations" },
{ "fetch_chunksize",
tweak_bytes,
&mgt_param.fetch_chunksize, 4 * 1024, UINT_MAX,
"The default chunksize used by fetcher. "
"This should be bigger than the majority of objects with "
"short TTLs.\n"
"Internal limits in the storage_file module makes increases "
"above 128kb a dubious idea.",
EXPERIMENTAL,
"128k", "bytes" },
{ "fetch_maxchunksize",
tweak_bytes,
&mgt_param.fetch_maxchunksize, 64 * 1024, UINT_MAX,
"The maximum chunksize we attempt to allocate from storage. "
"Making this too large may cause delays and storage "
"fragmentation.\n",
EXPERIMENTAL,
"256m", "bytes" },
{ "accept_filter", tweak_bool, &mgt_param.accept_filter, 0, 0,
"Enable kernel accept-filters, if supported by the kernel.",
MUST_RESTART,
"on", "bool" },
{ "listen_address", tweak_listen_address, NULL, 0, 0,
"Whitespace separated list of network endpoints where "
"Varnish will accept requests.\n"
"Possible formats: host, host:port, :port",
MUST_RESTART,
":80" },
{ "listen_depth", tweak_uint, &mgt_param.listen_depth, 0, UINT_MAX,
"Listen queue depth.",
MUST_RESTART,
"1024", "connections" },
{ "cli_buffer",
tweak_bytes_u, &mgt_param.cli_buffer, 4096, UINT_MAX,
"Size of buffer for CLI command input."
"\nYou may need to increase this if you have big VCL files "
"and use the vcl.inline CLI command.\n"
"NB: Must be specified with -p to have effect.\n",
0,
"8k", "bytes" },
{ "cli_limit",
tweak_bytes_u, &mgt_param.cli_limit, 128, 99999999,
"Maximum size of CLI response. If the response exceeds"
" this limit, the reponse code will be 201 instead of"
" 200 and the last line will indicate the truncation.",
0,
"48k", "bytes" },
{ "cli_timeout", tweak_timeout, &mgt_param.cli_timeout, 0, 0,
"Timeout for the childs replies to CLI requests from "
"the mgt_param.",
0,
"10", "seconds" },
{ "ping_interval", tweak_uint, &mgt_param.ping_interval, 0, UINT_MAX,
"Interval between pings from parent to child.\n"
"Zero will disable pinging entirely, which makes "
"it possible to attach a debugger to the child.",
MUST_RESTART,
"3", "seconds" },
{ "lru_interval", tweak_timeout, &mgt_param.lru_timeout, 0, 0,
"Grace period before object moves on LRU list.\n"
"Objects are only moved to the front of the LRU "
"list if they have not been moved there already inside "
"this timeout period. This reduces the amount of lock "
"operations necessary for LRU list access.",
EXPERIMENTAL,
"2", "seconds" },
{ "cc_command", tweak_string, &mgt_cc_cmd, 0, 0,
"Command used for compiling the C source code to a "
"dlopen(3) loadable object. Any occurrence of %s in "
"the string will be replaced with the source file name, "
"and %o will be replaced with the output file name.",
MUST_RELOAD,
VCC_CC , NULL },
{ "max_restarts", tweak_uint, &mgt_param.max_restarts, 0, UINT_MAX,
"Upper limit on how many times a request can restart."
"\nBe aware that restarts are likely to cause a hit against "
"the backend, so don't increase thoughtlessly.\n",
0,
"4", "restarts" },
{ "esi_syntax",
tweak_uint, &mgt_param.esi_syntax, 0, UINT_MAX,
"Bitmap controlling ESI parsing code:\n"
" 0x00000001 - Don't check if it looks like XML\n"
" 0x00000002 - Ignore non-esi elements\n"
" 0x00000004 - Emit parsing debug records\n"
" 0x00000008 - Force-split parser input (debugging)\n"
"\n"
"Use 0x notation and do the bitor in your head :-)\n",
0,
"0", "bitmap" },
{ "max_esi_depth",
tweak_uint, &mgt_param.max_esi_depth, 0, UINT_MAX,
"Maximum depth of esi:include processing.\n",
0,
"5", "levels" },
{ "connect_timeout", tweak_timeout_double,
&mgt_param.connect_timeout,0, UINT_MAX,
"Default connection timeout for backend connections. "
"We only try to connect to the backend for this many "
"seconds before giving up. "
"VCL can override this default value for each backend and "
"backend request.",
0,
"0.7", "s" },
{ "first_byte_timeout", tweak_timeout_double,
&mgt_param.first_byte_timeout,0, UINT_MAX,
"Default timeout for receiving first byte from backend. "
"We only wait for this many seconds for the first "
"byte before giving up. A value of 0 means it will never time "
"out. "
"VCL can override this default value for each backend and "
"backend request. This parameter does not apply to pipe.",
0,
"60", "s" },
{ "between_bytes_timeout", tweak_timeout_double,
&mgt_param.between_bytes_timeout,0, UINT_MAX,
"Default timeout between bytes when receiving data from "
"backend. "
"We only wait for this many seconds between bytes "
"before giving up. A value of 0 means it will never time out. "
"VCL can override this default value for each backend request "
"and backend request. This parameter does not apply to pipe.",
0,
"60", "s" },
{ "acceptor_sleep_max", tweak_timeout_double,
&mgt_param.acceptor_sleep_max, 0, 10,
"If we run out of resources, such as file descriptors or "
"worker threads, the acceptor will sleep between accepts.\n"
"This parameter limits how long it can sleep between "
"attempts to accept new connections.",
EXPERIMENTAL,
"0.050", "s" },
{ "acceptor_sleep_incr", tweak_timeout_double,
&mgt_param.acceptor_sleep_incr, 0, 1,
"If we run out of resources, such as file descriptors or "
"worker threads, the acceptor will sleep between accepts.\n"
"This parameter control how much longer we sleep, each time "
"we fail to accept a new connection.",
EXPERIMENTAL,
"0.001", "s" },
{ "acceptor_sleep_decay", tweak_generic_double,
&mgt_param.acceptor_sleep_decay, 0, 1,
"If we run out of resources, such as file descriptors or "
"worker threads, the acceptor will sleep between accepts.\n"
"This parameter (multiplicatively) reduce the sleep duration "
"for each succesfull accept. (ie: 0.9 = reduce by 10%)",
EXPERIMENTAL,
"0.900", "" },
{ "clock_skew", tweak_uint, &mgt_param.clock_skew, 0, UINT_MAX,
"How much clockskew we are willing to accept between the "
"backend and our own clock.",
0,
"10", "s" },
{ "prefer_ipv6", tweak_bool, &mgt_param.prefer_ipv6, 0, 0,
"Prefer IPv6 address when connecting to backends which "
"have both IPv4 and IPv6 addresses.",
0,
"off", "bool" },
{ "session_max", tweak_uint,
&mgt_param.max_sess, 1000, UINT_MAX,
"Maximum number of sessions we will allocate from one pool "
"before just dropping connections.\n"
"This is mostly an anti-DoS measure, and setting it plenty "
"high should not hurt, as long as you have the memory for "
"it.\n",
0,
"100000", "sessions" },
{ "timeout_linger", tweak_timeout_double, &mgt_param.timeout_linger,
0, UINT_MAX,
"How long time the workerthread lingers on an idle session "
"before handing it over to the waiter.\n"
"When sessions are reused, as much as half of all reuses "
"happen within the first 100 msec of the previous request "
"completing.\n"
"Setting this too high results in worker threads not doing "
"anything for their keep, setting it too low just means that "
"more sessions take a detour around the waiter.",
EXPERIMENTAL,
"0.050", "seconds" },
{ "log_local_address", tweak_bool, &mgt_param.log_local_addr, 0, 0,
"Log the local address on the TCP connection in the "
"SessionOpen VSL record.\n"
"Disabling this saves a getsockname(2) system call "
"per TCP connection.\n",
0,
"on", "bool" },
{ "waiter", tweak_waiter, NULL, 0, 0,
"Select the waiter kernel interface.\n",
WIZARD | MUST_RESTART,
WAITER_DEFAULT, NULL },
{ "ban_dups", tweak_bool, &mgt_param.ban_dups, 0, 0,
"Detect and eliminate duplicate bans.\n",
0,
"on", "bool" },
{ "syslog_cli_traffic", tweak_bool, &mgt_param.syslog_cli_traffic, 0, 0,
"Log all CLI traffic to syslog(LOG_INFO).\n",
0,
"on", "bool" },
{ "ban_lurker_sleep", tweak_timeout_double,
&mgt_param.ban_lurker_sleep, 0, UINT_MAX,
"How long time does the ban lurker thread sleeps between "
"successful attempts to push the last item up the ban "
" list. It always sleeps a second when nothing can be done.\n"
"A value of zero disables the ban lurker.",
0,
"0.01", "s" },
{ "saintmode_threshold", tweak_uint,
&mgt_param.saintmode_threshold, 0, UINT_MAX,
"The maximum number of objects held off by saint mode before "
"no further will be made to the backend until one times out. "
"A value of 0 disables saintmode.",
EXPERIMENTAL,
"10", "objects" },
{ "http_range_support", tweak_bool, &mgt_param.http_range_support, 0, 0,
"Enable support for HTTP Range headers.\n",
0,
"on", "bool" },
{ "http_gzip_support", tweak_bool, &mgt_param.http_gzip_support, 0, 0,
"Enable gzip support. When enabled Varnish will compress "
"uncompressed objects before they are stored in the cache. "
"If a client does not support gzip encoding Varnish will "
"uncompress compressed objects on demand. Varnish will also "
"rewrite the Accept-Encoding header of clients indicating "
"support for gzip to:\n"
" Accept-Encoding: gzip\n\n"
"Clients that do not support gzip will have their "
"Accept-Encoding header removed. For more information on how "
"gzip is implemented please see the chapter on gzip in the "
"Varnish reference.",
EXPERIMENTAL,
"on", "bool" },
{ "gzip_level", tweak_uint, &mgt_param.gzip_level, 0, 9,
"Gzip compression level: 0=debug, 1=fast, 9=best",
0,
"6", ""},
{ "gzip_memlevel", tweak_uint, &mgt_param.gzip_memlevel, 1, 9,
"Gzip memory level 1=slow/least, 9=fast/most compression.\n"
"Memory impact is 1=1k, 2=2k, ... 9=256k.",
0,
"8", ""},
{ "gzip_buffer",
tweak_bytes_u, &mgt_param.gzip_buffer,
2048, UINT_MAX,
"Size of malloc buffer used for gzip processing.\n"
"These buffers are used for in-transit data,"
" for instance gunzip'ed data being sent to a client."
"Making this space to small results in more overhead,"
" writes to sockets etc, making it too big is probably"
" just a waste of memory.",
EXPERIMENTAL,
"32k", "bytes" },
{ "shortlived", tweak_timeout_double,
&mgt_param.shortlived, 0, UINT_MAX,
"Objects created with TTL shorter than this are always "
"put in transient storage.\n",
0,
"10.0", "s" },
{ "critbit_cooloff", tweak_timeout_double,
&mgt_param.critbit_cooloff, 60, 254,
"How long time the critbit hasher keeps deleted objheads "
"on the cooloff list.\n",
WIZARD,
"180.0", "s" },
{ "vcl_dir", tweak_string, &mgt_vcl_dir, 0, 0,
"Directory from which relative VCL filenames (vcl.load and "
"include) are opened.",
0,
#ifdef VARNISH_VCL_DIR
VARNISH_VCL_DIR,
#else
".",
#endif
NULL },
{ "vmod_dir", tweak_string, &mgt_vmod_dir, 0, 0,
"Directory where VCL modules are to be found.",
0,
#ifdef VARNISH_VMOD_DIR
VARNISH_VMOD_DIR,
#else
".",
#endif
NULL },
{ "vcc_err_unref", tweak_bool, &mgt_vcc_err_unref, 0, 0,
"Unreferenced VCL objects result in error.\n",
0,
"on", "bool" },
{ "vcc_allow_inline_c", tweak_bool, &mgt_vcc_allow_inline_c, 0, 0,
"Allow inline C code in VCL.\n",
0,
"on", "bool" },
{ "vcc_unsafe_path", tweak_bool, &mgt_vcc_unsafe_path, 0, 0,
"Allow '/' in vmod & include paths.\n"
"Allow 'import ... from ...'.\n",
0,
"on", "bool" },
{ "pcre_match_limit", tweak_uint,
&mgt_param.vre_limits.match,
1, UINT_MAX,
"The limit for the number of internal matching function"
" calls in a pcre_exec() execution.",
0,
"10000", ""},
{ "pcre_match_limit_recursion", tweak_uint,
&mgt_param.vre_limits.match_recursion,
1, UINT_MAX,
"The limit for the number of internal matching function"
" recursions in a pcre_exec() execution.",
0,
"10000", ""},
{ "vsl_space", tweak_bytes,
&mgt_param.vsl_space, 1024*1024, 0,
"The amount of space to allocate for the VSL fifo buffer"
" in the VSM memory segment."
" If you make this too small, varnish{ncsa|log} etc will"
" not be able to keep up."
" Making it too large just costs memory resources.",
MUST_RESTART,
"80M", "bytes"},
{ "vsm_space", tweak_bytes,
&mgt_param.vsm_space, 1024*1024, 0,
"The amount of space to allocate for stats counters"
" in the VSM memory segment."
" If you make this too small, some counters will be"
" invisible."
" Making it too large just costs memory resources.",
MUST_RESTART,
"1M", "bytes"},
{ "busyobj_worker_cache", tweak_bool,
&mgt_param.bo_cache, 0, 0,
"Cache free busyobj per worker thread."
"Disable this if you have very high hitrates and want"
"to save the memory of one busyobj per worker thread.",
0,
"false", ""},
{ "pool_vbc", tweak_poolparam, &mgt_param.vbc_pool, 0, 10000,
"Parameters for backend connection memory pool.\n"
MEMPOOL_TEXT,
0,
"10,100,10", ""},
{ "pool_req", tweak_poolparam, &mgt_param.req_pool, 0, 10000,
"Parameters for per worker pool request memory pool.\n"
MEMPOOL_TEXT,
0,
"10,100,10", ""},
{ "pool_sess", tweak_poolparam, &mgt_param.sess_pool, 0, 10000,
"Parameters for per worker pool session memory pool.\n"
MEMPOOL_TEXT,
0,
"10,100,10", ""},
{ "pool_vbo", tweak_poolparam, &mgt_param.vbo_pool, 0, 10000,
"Parameters for backend object fetch memory pool.\n"
MEMPOOL_TEXT,
0,
"10,100,10", ""},
{ "obj_readonly", tweak_bool, &mgt_param.obj_readonly, 0, 0,
"If set, we do not update obj.hits and obj.lastuse to"
"avoid dirtying VM pages associated with cached objects.",
0,
"false", ""},
{ NULL, NULL, NULL }
};
/*--------------------------------------------------------------------*/
#define WIDTH 76
......@@ -1440,7 +882,7 @@ void
MCF_ParamInit(struct cli *cli)
{
MCF_AddParams(input_parspec);
MCF_AddParams(mgt_parspec);
MCF_AddParams(WRK_parspec);
MCF_AddParams(VSL_parspec);
......
bin/varnishd/mgt/mgt_param.h
View file @ 6def8cf5
......@@ -50,6 +50,17 @@ struct parspec {
const char *units;
};
tweak_t tweak_user;
tweak_t tweak_group;
tweak_t tweak_string;
tweak_t tweak_bool;
tweak_t tweak_waiter;
tweak_t tweak_bytes_u;
tweak_t tweak_listen_address;
tweak_t tweak_timeout;
tweak_t tweak_generic_double;
tweak_t tweak_poolparam;
int tweak_generic_uint(struct cli *cli,
volatile unsigned *dest, const char *arg, unsigned min, unsigned max);
void tweak_uint(struct cli *cli, const struct parspec *par, const char *arg);
......@@ -57,8 +68,20 @@ void tweak_timeout_double(struct cli *cli,
const struct parspec *par, const char *arg);
void tweak_bytes(struct cli *cli, const struct parspec *par, const char *arg);
/* mgt_param_tbl.c */
extern const struct parspec mgt_parspec[];
/* mgt_param_vsl.c */
extern const struct parspec VSL_parspec[];
/* mgt_pool.c */
extern const struct parspec WRK_parspec[];
#define MAGIC_INIT_STRING "\001"
#define MEMPOOL_TEXT \
"The three numbers are:\n" \
" min_pool -- minimum size of free pool.\n" \
" max_pool -- maximum size of free pool.\n" \
" max_age -- max age of free element.\n"
bin/varnishd/mgt/mgt_param_tbl.c 0 → 100644
View file @ 6def8cf5
/*-
* Copyright (c) 2006 Verdens Gang AS
* Copyright (c) 2006-2013 Varnish Software AS
* All rights reserved.
*
* Author: Poul-Henning Kamp <phk@phk.freebsd.dk>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "config.h"
#include <limits.h>
#include <stdio.h>
#include "mgt/mgt.h"
#include "common/params.h"
#include "mgt/mgt_param.h"
#include "waiter/waiter.h"
/*
* Remember to update varnishd.1 whenever you add / remove a parameter or
* change its default value.
* XXX: we should generate the relevant section of varnishd.1 from here.
*/
const struct parspec mgt_parspec[] = {
{ "user", tweak_user, NULL, 0, 0,
"The unprivileged user to run as. Setting this will "
"also set \"group\" to the specified user's primary group.",
MUST_RESTART,
MAGIC_INIT_STRING },
{ "group", tweak_group, NULL, 0, 0,
"The unprivileged group to run as.",
MUST_RESTART,
MAGIC_INIT_STRING },
{ "default_ttl", tweak_timeout_double, &mgt_param.default_ttl,
0, UINT_MAX,
"The TTL assigned to objects if neither the backend nor "
"the VCL code assigns one.\n"
"Objects already cached will not be affected by changes "
"made until they are fetched from the backend again.\n"
"To force an immediate effect at the expense of a total "
"flush of the cache use \"ban obj.http.date ~ .\"",
0,
"120", "seconds" },
{ "workspace_client",
tweak_bytes_u, &mgt_param.workspace_client, 3072, UINT_MAX,
"Bytes of HTTP protocol workspace for clients HTTP req/resp."
" If larger than 4k, use a multiple of 4k for VM efficiency.",
DELAYED_EFFECT,
"64k", "bytes" },
{ "workspace_backend",
tweak_bytes_u, &mgt_param.workspace_backend, 1024, UINT_MAX,
"Bytes of HTTP protocol workspace for backend HTTP req/resp."
" If larger than 4k, use a multiple of 4k for VM efficiency.",
DELAYED_EFFECT,
"64k", "bytes" },
{ "workspace_thread",
tweak_bytes_u, &mgt_param.workspace_thread, 256, 8192,
"Bytes of auxillary workspace per thread.\n"
"This workspace is used for certain temporary data structures"
" during the operation of a worker thread.\n"
"One use is for the io-vectors for writing requests and"
" responses to sockets, having too little space will"
" result in more writev(2) system calls, having too much"
" just wastes the space.\n",
DELAYED_EFFECT,
"2048", "bytes" },
{ "http_req_hdr_len",
tweak_bytes_u, &mgt_param.http_req_hdr_len,
40, UINT_MAX,
"Maximum length of any HTTP client request header we will "
"allow. The limit is inclusive its continuation lines.\n",
0,
"8k", "bytes" },
{ "http_req_size",
tweak_bytes_u, &mgt_param.http_req_size,
256, UINT_MAX,
"Maximum number of bytes of HTTP client request we will deal "
"with. This is a limit on all bytes up to the double blank "
"line which ends the HTTP request.\n"
"The memory for the request is allocated from the client "
"workspace (param: workspace_client) and this parameter limits "
"how much of that the request is allowed to take up.",
0,
"32k", "bytes" },
{ "http_resp_hdr_len",
tweak_bytes_u, &mgt_param.http_resp_hdr_len,
40, UINT_MAX,
"Maximum length of any HTTP backend response header we will "
"allow. The limit is inclusive its continuation lines.\n",
0,
"8k", "bytes" },
{ "http_resp_size",
tweak_bytes_u, &mgt_param.http_resp_size,
256, UINT_MAX,
"Maximum number of bytes of HTTP backend resonse we will deal "
"with. This is a limit on all bytes up to the double blank "
"line which ends the HTTP request.\n"
"The memory for the request is allocated from the worker "
"workspace (param: thread_pool_workspace) and this parameter "
"limits how much of that the request is allowed to take up.",
0,
"32k", "bytes" },
{ "http_max_hdr", tweak_uint, &mgt_param.http_max_hdr, 32, 65535,
"Maximum number of HTTP headers we will deal with in "
"client request or backend reponses. "
"Note that the first line occupies five header fields.\n"
"This parameter does not influence storage consumption, "
"objects allocate exact space for the headers they store.\n",
0,
"64", "header lines" },
{ "vsl_buffer",
tweak_bytes_u, &mgt_param.vsl_buffer, 1024, UINT_MAX,
"Bytes of (req-/backend-)workspace dedicated to buffering"
" VSL records.\n"
"At a bare minimum, this must be longer than"
" the longest HTTP header to be logged.\n"
"Setting this too high costs memory, setting it too low"
" will cause more VSL flushes and likely increase"
" lock-contention on the VSL mutex.\n"
"Minimum is 1k bytes.",
0,
"4k", "bytes" },
{ "shm_reclen",
tweak_bytes_u, &mgt_param.shm_reclen, 16, 65535,
"Maximum number of bytes in SHM log record.\n"
"Maximum is 65535 bytes.",
0,
"255", "bytes" },
{ "default_grace", tweak_timeout_double, &mgt_param.default_grace,
0, UINT_MAX,
"Default grace period. We will deliver an object "
"this long after it has expired, provided another thread "
"is attempting to get a new copy.\n"
"Objects already cached will not be affected by changes "
"made until they are fetched from the backend again.\n",
DELAYED_EFFECT,
"10", "seconds" },
{ "default_keep", tweak_timeout_double, &mgt_param.default_keep,
0, UINT_MAX,
"Default keep period. We will keep a useless object "
"around this long, making it available for conditional "
"backend fetches. "
"That means that the object will be removed from the "
"cache at the end of ttl+grace+keep.",
DELAYED_EFFECT,
"0", "seconds" },
{ "timeout_idle", tweak_timeout_double, &mgt_param.timeout_idle,
0, UINT_MAX,
"Idle timeout for client connections.\n"
"A connection is considered idle, until we receive"
" a non-white-space character on it.",
0,
"5", "seconds" },
{ "timeout_req", tweak_timeout_double, &mgt_param.timeout_req,
0, UINT_MAX,
"Max time to receive clients request header, measured"
" from first non-white-space character to double CRNL.",
0,
"2", "seconds" },
{ "expiry_sleep", tweak_timeout_double, &mgt_param.expiry_sleep, 0, 60,
"How long the expiry thread sleeps when there is nothing "
"for it to do.\n",
0,
"1", "seconds" },
{ "pipe_timeout", tweak_timeout, &mgt_param.pipe_timeout, 0, 0,
"Idle timeout for PIPE sessions. "
"If nothing have been received in either direction for "
"this many seconds, the session is closed.\n",
0,
"60", "seconds" },
{ "send_timeout", tweak_timeout, &mgt_param.send_timeout, 0, 0,
"Send timeout for client connections. "
"If the HTTP response hasn't been transmitted in this many\n"
"seconds the session is closed. \n"
"See setsockopt(2) under SO_SNDTIMEO for more information.",
DELAYED_EFFECT,
"600", "seconds" },
{ "idle_send_timeout", tweak_timeout, &mgt_param.idle_send_timeout,
0, 0,
"Time to wait with no data sent. "
"If no data has been transmitted in this many\n"
"seconds the session is closed. \n"
"See setsockopt(2) under SO_SNDTIMEO for more information.",
DELAYED_EFFECT,
"60", "seconds" },
{ "auto_restart", tweak_bool, &mgt_param.auto_restart, 0, 0,
"Restart child process automatically if it dies.\n",
0,
"on", "bool" },
{ "nuke_limit",
tweak_uint, &mgt_param.nuke_limit, 0, UINT_MAX,
"Maximum number of objects we attempt to nuke in order"
"to make space for a object body.",
EXPERIMENTAL,
"50", "allocations" },
{ "fetch_chunksize",
tweak_bytes,
&mgt_param.fetch_chunksize, 4 * 1024, UINT_MAX,
"The default chunksize used by fetcher. "
"This should be bigger than the majority of objects with "
"short TTLs.\n"
"Internal limits in the storage_file module makes increases "
"above 128kb a dubious idea.",
EXPERIMENTAL,
"128k", "bytes" },
{ "fetch_maxchunksize",
tweak_bytes,
&mgt_param.fetch_maxchunksize, 64 * 1024, UINT_MAX,
"The maximum chunksize we attempt to allocate from storage. "
"Making this too large may cause delays and storage "
"fragmentation.\n",
EXPERIMENTAL,
"256m", "bytes" },
{ "accept_filter", tweak_bool, &mgt_param.accept_filter, 0, 0,
"Enable kernel accept-filters, if supported by the kernel.",
MUST_RESTART,
"on", "bool" },
{ "listen_address", tweak_listen_address, NULL, 0, 0,
"Whitespace separated list of network endpoints where "
"Varnish will accept requests.\n"
"Possible formats: host, host:port, :port",
MUST_RESTART,
":80" },
{ "listen_depth", tweak_uint, &mgt_param.listen_depth, 0, UINT_MAX,
"Listen queue depth.",
MUST_RESTART,
"1024", "connections" },
{ "cli_buffer",
tweak_bytes_u, &mgt_param.cli_buffer, 4096, UINT_MAX,
"Size of buffer for CLI command input."
"\nYou may need to increase this if you have big VCL files "
"and use the vcl.inline CLI command.\n"
"NB: Must be specified with -p to have effect.\n",
0,
"8k", "bytes" },
{ "cli_limit",
tweak_bytes_u, &mgt_param.cli_limit, 128, 99999999,
"Maximum size of CLI response. If the response exceeds"
" this limit, the reponse code will be 201 instead of"
" 200 and the last line will indicate the truncation.",
0,
"48k", "bytes" },
{ "cli_timeout", tweak_timeout, &mgt_param.cli_timeout, 0, 0,
"Timeout for the childs replies to CLI requests from "
"the mgt_param.",
0,
"10", "seconds" },
{ "ping_interval", tweak_uint, &mgt_param.ping_interval, 0, UINT_MAX,
"Interval between pings from parent to child.\n"
"Zero will disable pinging entirely, which makes "
"it possible to attach a debugger to the child.",
MUST_RESTART,
"3", "seconds" },
{ "lru_interval", tweak_timeout, &mgt_param.lru_timeout, 0, 0,
"Grace period before object moves on LRU list.\n"
"Objects are only moved to the front of the LRU "
"list if they have not been moved there already inside "
"this timeout period. This reduces the amount of lock "
"operations necessary for LRU list access.",
EXPERIMENTAL,
"2", "seconds" },
{ "cc_command", tweak_string, &mgt_cc_cmd, 0, 0,
"Command used for compiling the C source code to a "
"dlopen(3) loadable object. Any occurrence of %s in "
"the string will be replaced with the source file name, "
"and %o will be replaced with the output file name.",
MUST_RELOAD,
VCC_CC , NULL },
{ "max_restarts", tweak_uint, &mgt_param.max_restarts, 0, UINT_MAX,
"Upper limit on how many times a request can restart."
"\nBe aware that restarts are likely to cause a hit against "
"the backend, so don't increase thoughtlessly.\n",
0,
"4", "restarts" },
{ "esi_syntax",
tweak_uint, &mgt_param.esi_syntax, 0, UINT_MAX,
"Bitmap controlling ESI parsing code:\n"
" 0x00000001 - Don't check if it looks like XML\n"
" 0x00000002 - Ignore non-esi elements\n"
" 0x00000004 - Emit parsing debug records\n"
" 0x00000008 - Force-split parser input (debugging)\n"
"\n"
"Use 0x notation and do the bitor in your head :-)\n",
0,
"0", "bitmap" },
{ "max_esi_depth",
tweak_uint, &mgt_param.max_esi_depth, 0, UINT_MAX,
"Maximum depth of esi:include processing.\n",
0,
"5", "levels" },
{ "connect_timeout", tweak_timeout_double,
&mgt_param.connect_timeout,0, UINT_MAX,
"Default connection timeout for backend connections. "
"We only try to connect to the backend for this many "
"seconds before giving up. "
"VCL can override this default value for each backend and "
"backend request.",
0,
"0.7", "s" },
{ "first_byte_timeout", tweak_timeout_double,
&mgt_param.first_byte_timeout,0, UINT_MAX,
"Default timeout for receiving first byte from backend. "
"We only wait for this many seconds for the first "
"byte before giving up. A value of 0 means it will never time "
"out. "
"VCL can override this default value for each backend and "
"backend request. This parameter does not apply to pipe.",
0,
"60", "s" },
{ "between_bytes_timeout", tweak_timeout_double,
&mgt_param.between_bytes_timeout,0, UINT_MAX,
"Default timeout between bytes when receiving data from "
"backend. "
"We only wait for this many seconds between bytes "
"before giving up. A value of 0 means it will never time out. "
"VCL can override this default value for each backend request "
"and backend request. This parameter does not apply to pipe.",
0,
"60", "s" },
{ "acceptor_sleep_max", tweak_timeout_double,
&mgt_param.acceptor_sleep_max, 0, 10,
"If we run out of resources, such as file descriptors or "
"worker threads, the acceptor will sleep between accepts.\n"
"This parameter limits how long it can sleep between "
"attempts to accept new connections.",
EXPERIMENTAL,
"0.050", "s" },
{ "acceptor_sleep_incr", tweak_timeout_double,
&mgt_param.acceptor_sleep_incr, 0, 1,
"If we run out of resources, such as file descriptors or "
"worker threads, the acceptor will sleep between accepts.\n"
"This parameter control how much longer we sleep, each time "
"we fail to accept a new connection.",
EXPERIMENTAL,
"0.001", "s" },
{ "acceptor_sleep_decay", tweak_generic_double,
&mgt_param.acceptor_sleep_decay, 0, 1,
"If we run out of resources, such as file descriptors or "
"worker threads, the acceptor will sleep between accepts.\n"
"This parameter (multiplicatively) reduce the sleep duration "
"for each succesfull accept. (ie: 0.9 = reduce by 10%)",
EXPERIMENTAL,
"0.900", "" },
{ "clock_skew", tweak_uint, &mgt_param.clock_skew, 0, UINT_MAX,
"How much clockskew we are willing to accept between the "
"backend and our own clock.",
0,
"10", "s" },
{ "prefer_ipv6", tweak_bool, &mgt_param.prefer_ipv6, 0, 0,
"Prefer IPv6 address when connecting to backends which "
"have both IPv4 and IPv6 addresses.",
0,
"off", "bool" },
{ "session_max", tweak_uint,
&mgt_param.max_sess, 1000, UINT_MAX,
"Maximum number of sessions we will allocate from one pool "
"before just dropping connections.\n"
"This is mostly an anti-DoS measure, and setting it plenty "
"high should not hurt, as long as you have the memory for "
"it.\n",
0,
"100000", "sessions" },
{ "timeout_linger", tweak_timeout_double, &mgt_param.timeout_linger,
0, UINT_MAX,
"How long time the workerthread lingers on an idle session "
"before handing it over to the waiter.\n"
"When sessions are reused, as much as half of all reuses "
"happen within the first 100 msec of the previous request "
"completing.\n"
"Setting this too high results in worker threads not doing "
"anything for their keep, setting it too low just means that "
"more sessions take a detour around the waiter.",
EXPERIMENTAL,
"0.050", "seconds" },
{ "log_local_address", tweak_bool, &mgt_param.log_local_addr, 0, 0,
"Log the local address on the TCP connection in the "
"SessionOpen VSL record.\n"
"Disabling this saves a getsockname(2) system call "
"per TCP connection.\n",
0,
"on", "bool" },
{ "waiter", tweak_waiter, NULL, 0, 0,
"Select the waiter kernel interface.\n",
WIZARD | MUST_RESTART,
WAITER_DEFAULT, NULL },
{ "ban_dups", tweak_bool, &mgt_param.ban_dups, 0, 0,
"Detect and eliminate duplicate bans.\n",
0,
"on", "bool" },
{ "syslog_cli_traffic", tweak_bool, &mgt_param.syslog_cli_traffic, 0, 0,
"Log all CLI traffic to syslog(LOG_INFO).\n",
0,
"on", "bool" },
{ "ban_lurker_sleep", tweak_timeout_double,
&mgt_param.ban_lurker_sleep, 0, UINT_MAX,
"How long time does the ban lurker thread sleeps between "
"successful attempts to push the last item up the ban "
" list. It always sleeps a second when nothing can be done.\n"
"A value of zero disables the ban lurker.",
0,
"0.01", "s" },
{ "saintmode_threshold", tweak_uint,
&mgt_param.saintmode_threshold, 0, UINT_MAX,
"The maximum number of objects held off by saint mode before "
"no further will be made to the backend until one times out. "
"A value of 0 disables saintmode.",
EXPERIMENTAL,
"10", "objects" },
{ "http_range_support", tweak_bool, &mgt_param.http_range_support, 0, 0,
"Enable support for HTTP Range headers.\n",
0,
"on", "bool" },
{ "http_gzip_support", tweak_bool, &mgt_param.http_gzip_support, 0, 0,
"Enable gzip support. When enabled Varnish will compress "
"uncompressed objects before they are stored in the cache. "
"If a client does not support gzip encoding Varnish will "
"uncompress compressed objects on demand. Varnish will also "
"rewrite the Accept-Encoding header of clients indicating "
"support for gzip to:\n"
" Accept-Encoding: gzip\n\n"
"Clients that do not support gzip will have their "
"Accept-Encoding header removed. For more information on how "
"gzip is implemented please see the chapter on gzip in the "
"Varnish reference.",
EXPERIMENTAL,
"on", "bool" },
{ "gzip_level", tweak_uint, &mgt_param.gzip_level, 0, 9,
"Gzip compression level: 0=debug, 1=fast, 9=best",
0,
"6", ""},
{ "gzip_memlevel", tweak_uint, &mgt_param.gzip_memlevel, 1, 9,
"Gzip memory level 1=slow/least, 9=fast/most compression.\n"
"Memory impact is 1=1k, 2=2k, ... 9=256k.",
0,
"8", ""},
{ "gzip_buffer",
tweak_bytes_u, &mgt_param.gzip_buffer,
2048, UINT_MAX,
"Size of malloc buffer used for gzip processing.\n"
"These buffers are used for in-transit data,"
" for instance gunzip'ed data being sent to a client."
"Making this space to small results in more overhead,"
" writes to sockets etc, making it too big is probably"
" just a waste of memory.",
EXPERIMENTAL,
"32k", "bytes" },
{ "shortlived", tweak_timeout_double,
&mgt_param.shortlived, 0, UINT_MAX,
"Objects created with TTL shorter than this are always "
"put in transient storage.\n",
0,
"10.0", "s" },
{ "critbit_cooloff", tweak_timeout_double,
&mgt_param.critbit_cooloff, 60, 254,
"How long time the critbit hasher keeps deleted objheads "
"on the cooloff list.\n",
WIZARD,
"180.0", "s" },
{ "vcl_dir", tweak_string, &mgt_vcl_dir, 0, 0,
"Directory from which relative VCL filenames (vcl.load and "
"include) are opened.",
0,
#ifdef VARNISH_VCL_DIR
VARNISH_VCL_DIR,
#else
".",
#endif
NULL },
{ "vmod_dir", tweak_string, &mgt_vmod_dir, 0, 0,
"Directory where VCL modules are to be found.",
0,
#ifdef VARNISH_VMOD_DIR
VARNISH_VMOD_DIR,
#else
".",
#endif
NULL },
{ "vcc_err_unref", tweak_bool, &mgt_vcc_err_unref, 0, 0,
"Unreferenced VCL objects result in error.\n",
0,
"on", "bool" },
{ "vcc_allow_inline_c", tweak_bool, &mgt_vcc_allow_inline_c, 0, 0,
"Allow inline C code in VCL.\n",
0,
"on", "bool" },
{ "vcc_unsafe_path", tweak_bool, &mgt_vcc_unsafe_path, 0, 0,
"Allow '/' in vmod & include paths.\n"
"Allow 'import ... from ...'.\n",
0,
"on", "bool" },
{ "pcre_match_limit", tweak_uint,
&mgt_param.vre_limits.match,
1, UINT_MAX,
"The limit for the number of internal matching function"
" calls in a pcre_exec() execution.",
0,
"10000", ""},
{ "pcre_match_limit_recursion", tweak_uint,
&mgt_param.vre_limits.match_recursion,
1, UINT_MAX,
"The limit for the number of internal matching function"
" recursions in a pcre_exec() execution.",
0,
"10000", ""},
{ "vsl_space", tweak_bytes,
&mgt_param.vsl_space, 1024*1024, 0,
"The amount of space to allocate for the VSL fifo buffer"
" in the VSM memory segment."
" If you make this too small, varnish{ncsa|log} etc will"
" not be able to keep up."
" Making it too large just costs memory resources.",
MUST_RESTART,
"80M", "bytes"},
{ "vsm_space", tweak_bytes,
&mgt_param.vsm_space, 1024*1024, 0,
"The amount of space to allocate for stats counters"
" in the VSM memory segment."
" If you make this too small, some counters will be"
" invisible."
" Making it too large just costs memory resources.",
MUST_RESTART,
"1M", "bytes"},
{ "busyobj_worker_cache", tweak_bool,
&mgt_param.bo_cache, 0, 0,
"Cache free busyobj per worker thread."
"Disable this if you have very high hitrates and want"
"to save the memory of one busyobj per worker thread.",
0,
"false", ""},
{ "pool_vbc", tweak_poolparam, &mgt_param.vbc_pool, 0, 10000,
"Parameters for backend connection memory pool.\n"
MEMPOOL_TEXT,
0,
"10,100,10", ""},
{ "pool_req", tweak_poolparam, &mgt_param.req_pool, 0, 10000,
"Parameters for per worker pool request memory pool.\n"
MEMPOOL_TEXT,
0,
"10,100,10", ""},
{ "pool_sess", tweak_poolparam, &mgt_param.sess_pool, 0, 10000,
"Parameters for per worker pool session memory pool.\n"
MEMPOOL_TEXT,
0,
"10,100,10", ""},
{ "pool_vbo", tweak_poolparam, &mgt_param.vbo_pool, 0, 10000,
"Parameters for backend object fetch memory pool.\n"
MEMPOOL_TEXT,
0,
"10,100,10", ""},
{ "obj_readonly", tweak_bool, &mgt_param.obj_readonly, 0, 0,
"If set, we do not update obj.hits and obj.lastuse to"
"avoid dirtying VM pages associated with cached objects.",
0,
"false", ""},
{ NULL, NULL, NULL }
};
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