Amos / Kinkie, thanks for your replies. >From what I see, I don’t see how increasing the number of helpers could help resolving the problem as I see there are even idle helpers at the time when the squid crashes. Actually I am doing a capacity test on our local squid box, I am curious to know how I can avoid the crash in order to get a consistent result. I ran the same ramp test twice, but the crashes occurred at different times. Any advice or suggestion will be appreciated. Thanks, Jacky On Fri, May 27, 2011 at 5:04 AM, Amos Jeffries <squid3@xxxxxxxxxxxxx> wrote: > On 27/05/11 08:54, unjc email wrote: >> >> Hello there, >> >> I encounter a performance issue. I found that the squid proxy crashes >> occasionally due to "Too many queued negotiateauthenticator requests". >> When I monitor the server by querying "squidclient >> mgr:negotiateauthenticator", I discovered that not all authenticators >> are busy at the same time. It seems like only the authenticators on >> the top of the list are busy with queued requests; but many of others >> down at the bottom of the list are basically idle. It looks like a >> load-balancing problem among the authenticators. Please advise if >> there is any setting for load-balancing authenticators in squid.conf. > > Yes. There is no point "balancing" helpers. Each is pinned 1:1 with a client > login for the entire time it takes to operate. When the first is pinned the > seconds gets used, etc. Once the first helper is released, it can > immediately be used for another client without swapping it in/out of memory > just to reach one that has not been used yet. > >> cache.log: >> >> 2011/05/25 03:04:44| WARNING: up to 199 pending requests queued >> 2011/05/25 03:04:44| Consider increasing the number of >> negotiateauthenticator processes to at least 239 in your config file. >> 2011/05/25 03:05:01| storeDirWriteCleanLogs: Starting... >> 2011/05/25 03:05:01| Finished. Wrote 0 entries. >> 2011/05/25 03:05:01| Took 0.0 seconds ( 0.0 entries/sec). >> FATAL: Too many queued negotiateauthenticator requests (201 on 40) >> Squid Cache (Version 2.7.STABLE4): Terminated abnormally. >> > > Upgrade to 2.7.STABLE9. There are several negotiate and helper fixes in that > version. Maybe an underlying problem is resolved already. > > If it continues there, you could try following Squids advice which was > displayed at your peak load: > >> 2011/05/25 03:04:44| Consider increasing the number of >> negotiateauthenticator processes to at least 239 in your config file. > > > Amos > -- > Please be using > Current Stable Squid 2.7.STABLE9 or 3.1.12 > Beta testers wanted for 3.2.0.7 and 3.1.12.1 >
