Theoretical connections/second limit using Varnish

Poul-Henning Kamp phk at
Fri May 1 10:16:27 CEST 2009

In message <49F9BF57.4020909 at>, Nick Loman writes:

>Precisely, we only have perhaps 50 PHP children serving requests, so if 
>these are kept open to serve idle keep-alive connections, that severely 
>limits the numbers of dynamic page requests we can serve.

The difference between letting them say open 10msec and 0msec is very
significant when it comes to performance.

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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