On 4/08/2016 2:32 a.m., Heiler Bemerguy wrote: > > I think it doesn't really matter how much squid sets its default buffer. > The linux kernel will upscale to the maximum set by the third option. > (and the TCP Window Size will follow that) > > net.ipv4.tcp_wmem = 1024 32768 8388608 > net.ipv4.tcp_rmem = 1024 32768 8388608 >
Having large system buffers like that just leads to buffer bloat problems. Squid is still the bottleneck if it is sending only 4KB each I/O cycle to the client - no matter how much is already received by Squid, or stuck in kernel queues waiting to arrive to Squid. The more heavily loaded the proxy is the longer each I/O cycle gets as all clients get one slice of the cycle to do whatever processing they need done. The buffers limited by HTTP_REQBUF_SZ are not dynamic so its not just a minimum. Nathan found a 300% speed increase from a 3x buffer size increase. Which is barely noticable (but still present) on small responses, but very noticable with large transactions. Amos _______________________________________________ squid-users mailing list squid-users@lists.squid-cache.org http://lists.squid-cache.org/listinfo/squid-users
