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varnishcache
varnish-cache
Commits
13c60b52
Commit
13c60b52
authored
Mar 08, 2011
by
Per Buer
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Spelling errors (thanks to Camiel Dobbelaar)
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095f6b23
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handling_misbehaving_servers.rst
doc/sphinx/tutorial/handling_misbehaving_servers.rst
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doc/sphinx/tutorial/handling_misbehaving_servers.rst
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13c60b52
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@@ -17,10 +17,10 @@ one copy from the back end. In some products this is called request
coalescing and Varnish does this automatically.
If you are serving thousands of hits per second the queue of waiting
requests can get huge. There are to potential problems - one is a
thundering he
a
rd problem - suddenly releasing a thousand threads to
serve content might send t
o
load sky high. Secondly - nobody likes to
wait. To deal with this
Varnish can
we can instruct Varnish to keep
requests can get huge. There are t
w
o potential problems - one is a
thundering herd problem - suddenly releasing a thousand threads to
serve content might send t
he
load sky high. Secondly - nobody likes to
wait. To deal with this we can instruct Varnish to keep
the objects in cache beyond their TTL and to serve the waiting
requests somewhat stale content.
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@@ -88,7 +88,7 @@ Known limitations on grace- and saint mode
If your request fails while it is being fetched you're thrown into
vcl_error. vcl_error has access to a rather limited set of data so you
can't enable saint mode or grace mode here. This will be addressed in a
future release but a work-around
is
available.
future release but a work-around available.
* Declare a backend that is always sick.
* Set a magic marker in vcl_error
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