[squid-users] Squid performance not able to drive a 1Gbps internet link

[Heiler Bemerguy]

in /etc/sysctl.conf, add:

net.core.rmem_max = 8388608
net.core.wmem_max = 8388608
net.core.wmem_default = 32768
net.core.rmem_default = 32768
net.ipv4.tcp_wmem = 1024 32768 8388608
net.ipv4.tcp_rmem = 1024 32768 8388608


-- 
Best Regards,

Heiler Bemerguy
Network Manager - CINBESA
55 91 98151-4894/3184-1751


Em 02/08/2016 23:37, Paul van Tuel escreveu:
> Hi All,
> We've been running Squid for many years. Recently we upgraded our 
> internet link to a 1Gbps link, but we are finding that squid is not 
> able to drive this link to its full potential (previous links have 
> been 30Mbps or 100Mbps).
> Currently running squid 3.5.1, but have tried 3.4, 3.3, 3.2 versions too.
>
> Upload speeds from the server (without using the local proxy) to the 
> internet are 200-300Mbps
> Download speeds from the server (without using the local proxy) to the 
> internet are 300-600Mbps (the link is not guaranteed).
>
> If we use squid (or tinyproxy) to upload a file the upload speed is 
> varies from 15-50Mbps.
> If we use squid (or tinyproxy) to download a file from the internet, 
> the speeds varies from 80-115Mbps.
>
> We have used various combinations of hardware:
> * Dell Power Edge T300, 2950 with SSD or SAS disks. Both using 
> bare-metal or VMWare ESXi. Quad-core 2.6GHz Xeon processors with 8G or 
> 16G RAM
> * We have used windows 7 Pro, Ubuntu, Centos 6, Centos 7 each as 
> bare-metal and as VM under ESXi.
> * We have used a white box (Asus motherboard with 1Gbps NIC, i7, 16G 
> RAM) with each of the above OSes in bare-metal installations.
>
> Squid configuration has basically been the out-of-the-box sample file 
> with no authentication enabled. Only one user testing the performance 
> of the squid proxy. The server is pretty much idle.
>
> Each time the result is the same - if we go direct to the internet 
> without using the local proxy the speed is as we would expect. If we 
> use the local proxy, the speed drops significantly.
> Is this expected behaviour? Or is there something we can do to speed 
> up/tune squid's performance? I would be expecting squid to utilise the 
> full bandwidth available (similar to what the server can download if 
> you do not use a proxy).
>
>
> Thank you
> Paul.
>
>
>
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