Connections on the varnishbox
phk at phk.freebsd.dk
Fri Oct 26 11:58:09 CEST 2007
In message <ujrbqanfib4.fsf at false.linpro.no>, =?iso-8859-1?Q?Dag-Erling_Sm=F8rg
>One thing the man page doesn't mention is that connections are
>assigned to pools by computing (fd % thread_pools), so increasing the
>number of pools will also increase the likelihood that a connection
>will remain on the overflow queue even if there are threads available
>in other pools. I don't know where the cutoff is, but it's likely to
>be at or below sqrt(thread_pool_max).
In retrospect, I am not convinced that idea/implementation of
multiple thread pools is sufficiently sound. Its one area that
we will have to impove somehow.
Under no circumstances should more than a few pools (< 5) be created.
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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