[squid-users] Squid on FC6, connections sitting around too long
Trying to figure out how I can reduce connections, sitting around on my Squid boxes. I'm still running with both Netcaches and a few Squid boxes and what I'm seeing in my loadbalancer is that the Netcaches have 50% less connections at any given time than the Squid boxes. Also the Netcache (Netapp) is pushing more traffic, so what I'm gathering is that the Netapp is taking in connections and releasing them faster than the squid boxes. I'm wondering if A) how I can diagnose this B), is there Squid specific settings to handle this (I don't really want to close an active connection, but absolutely want a connection that has been left by a client to go away). Not sure if I should be looking at kernel/network tweaks or something in my Squid configuration. Packets Bits Packets Bits Current Max Total 18.5M 21.5G 23.6M 172.0G 7371.3K 1.2M Squid 21.2M 26.8G 28.8M 199.2G 2741.3K 1.2M NetCache 21.6M 27.1G 29.5M 206.4G 2491.3K 1.2M NetCache 18.6M 21.6G 23.7M 172.5G 7351.2K 1.2M Squid Shows that the Squid boxes even though the loadbalancer is handing connections off in a round robin fashion, Squid twice the connection count as the Netapps. What pertinent information would you need to throw an idea over? Thanks Tory
Re: [squid-users] Squid on FC6, connections sitting around too long
You of course need to start looking at this by analysing what is actually going on with the boxes and the network layer. There's not much that can be suggested given the current information. That said, NetCache's -are- much more efficient for most workloads than Squid. Its just what happens when you sink $0 versus $LARGE into a product. Adrian On Fri, Oct 12, 2007, Tory M Blue wrote: > Trying to figure out how I can reduce connections, sitting around on > my Squid boxes. > > I'm still running with both Netcaches and a few Squid boxes and what > I'm seeing in my loadbalancer is that the Netcaches have 50% less > connections at any given time than the Squid boxes. Also the Netcache > (Netapp) is pushing more traffic, so what I'm gathering is that the > Netapp is taking in connections and releasing them faster than the > squid boxes. > > I'm wondering if A) how I can diagnose this B), is there Squid > specific settings to handle this (I don't really want to close an > active connection, but absolutely want a connection that has been left > by a client to go away). > > Not sure if I should be looking at kernel/network tweaks or something > in my Squid configuration. > > Packets Bits Packets Bits Current Max Total > 18.5M 21.5G 23.6M 172.0G 7371.3K 1.2M Squid > 21.2M 26.8G 28.8M 199.2G 2741.3K 1.2M NetCache > 21.6M 27.1G 29.5M 206.4G 2491.3K 1.2M NetCache > 18.6M 21.6G 23.7M 172.5G 7351.2K 1.2M Squid > > Shows that the Squid boxes even though the loadbalancer is handing > connections off in a round robin fashion, Squid twice the connection > count as the Netapps. > > What pertinent information would you need to throw an idea over? > > Thanks > Tory -- - Xenion - http://www.xenion.com.au/ - VPS Hosting - Commercial Squid Support - - $25/pm entry-level bandwidth-capped VPSes available in WA -
Re: [squid-users] Squid on FC6, connections sitting around too long
On fre, 2007-10-12 at 10:52 -0700, Tory M Blue wrote: > Trying to figure out how I can reduce connections, sitting around on > my Squid boxes. > > I'm still running with both Netcaches and a few Squid boxes and what > I'm seeing in my loadbalancer is that the Netcaches have 50% less > connections at any given time than the Squid boxes. Also the Netcache > (Netapp) is pushing more traffic, so what I'm gathering is that the > Netapp is taking in connections and releasing them faster than the > squid boxes. Probably you have a TCP connection based load balancer instead of one that balances on actual traffic, and the Netcaches have persistent connections disabled.. > I'm wondering if A) how I can diagnose this B), is there Squid > specific settings to handle this (I don't really want to close an > active connection, but absolutely want a connection that has been left > by a client to go away). See the client_persistent_connections and persistent_request_timeout directives. Regards Henrik signature.asc Description: This is a digitally signed message part
Re: [squid-users] Squid on FC6, connections sitting around too long
On 10/15/07, Henrik Nordstrom <[EMAIL PROTECTED]> wrote: > > Probably you have a TCP connection based load balancer instead of one > that balances on actual traffic, and the Netcaches have persistent > connections disabled.. > See the client_persistent_connections and persistent_request_timeout > directives. > > Regards > Henrik For some reason when I initially configured these I thought persistence was off by default, but looking at the config guides, I see it's defaulted to on. Playing with persistence on/off and persistence timeout is helping things tremendously. Squid is showing more output/input than the netcaches now. Now I'm working on finding the right combination to keep open connections to a minimum while continuing max throughput. Client persistence in a reverse proxy environment makes no sens, and since my server environment is also load balanced, not sure it makes much sense there (still testing), but definitely persistence timeout plays a big role. Thanks again Toryi
Re: [squid-users] Squid on FC6, connections sitting around too long
On tis, 2007-10-16 at 09:42 -0700, Tory M Blue wrote: > Client persistence in a reverse proxy environment makes no sens I disagree. The TCP setup cost is a very large portion of the total page load time, especially if you have users far away.. but it do place a different workload on the load balancers, and mixing servers with different persistent connections settings the same farm is hard to balance right.. Regards Henrik signature.asc Description: This is a digitally signed message part
