The option to change the number of thread pools might very well go away in the future. I guess PHK wasn't sure how much locking and CPU affinity would influence the performance of the pools. In order to know you have to implement it. A lot of the tunables are like that, values based on guesses, not necessary exact measurements.
On Fri, May 3, 2013 at 12:34 AM, Stephen Wood <[email protected]> wrote: > Are there any exceptions to the "2 is best" rule for this? I'm asking out > of curiosity. It seems strange to me that Varnish would even provide the > option to change it if any other value is detrimental to performance. > > > On Thu, May 2, 2013 at 2:02 PM, Per Buer <[email protected]>wrote: > >> That is correct. We haven't been able to see any increase in performance >> when the number of pools is increased above 2. >> >> >> On Thu, May 2, 2013 at 4:31 PM, Rangel, Raul <[email protected]>wrote: >> >>> I think someone recently commented that 2 thread pools is the ideal >>> value. Anymore and you don’t see a performance increase.**** >>> >>> ** ** >>> >>> Raul**** >>> >>> ** ** >>> >>> *From:* [email protected] [mailto: >>> [email protected]] *On Behalf Of *[email protected] >>> *Sent:* Wednesday, March 06, 2013 2:23 PM >>> *To:* [email protected] >>> *Subject:* varnish 3 - thread_pools**** >>> >>> ** ** >>> >>> Hi,**** >>> >>> **** >>> >>> By the book, the thread_pools should be 2. However the server is >>> multi-processed(8 cpus) and can handle more thread_pools.**** >>> >>> This server handles more than 5000 requests/sec. **** >>> >>> **** >>> >>> Is it a good ideia increasing the thread_pools to 8 and decreasing the >>> thread_pool_max?**** >>> >>> **** >>> >>> regards,**** >>> >>> **** >>> >>> Leandro Sano**** >>> >>> _______________________________________________ >>> varnish-misc mailing list >>> [email protected] >>> https://www.varnish-cache.org/lists/mailman/listinfo/varnish-misc >>> >> >> >> >> -- >> <http://www.varnish-software.com/> *Per Buer* >> CEO | Varnish Software AS >> Phone: +47 958 39 117 | Skype: per.buer >> We Make Websites Fly! >> >> Winner of the Red Herring Top 100 Europe Award 2013 >> >> >> >> _______________________________________________ >> varnish-misc mailing list >> [email protected] >> https://www.varnish-cache.org/lists/mailman/listinfo/varnish-misc >> > > -- <http://www.varnish-software.com/> *Per Buer* CEO | Varnish Software AS Phone: +47 958 39 117 | Skype: per.buer We Make Websites Fly! Winner of the Red Herring Top 100 Europe Award 2013
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