Sunday 27 September 2009 1:32:58 am
Hi folks, I could need some help with a problem I have with quite big site, running 4.1.1. Yesterday I noticed that the site perfomance had degraded severely over night. Checking with Top in Linux (Ubuntu 8.04) I noticed a load average of 20-40 (!). Normal load average is around 1... While doing some tests I noticed that it is only full views that is slow to generate, like articles. Meaning that it is only what is generated in $module_result that pulls performance down. In addition to that I found this in the cluster.log file:
[ Sep 27 2009 10:14:43 ] Generation of 'var/xxx/cache/content/xxx/1/100-3235a020a1be5aa5d5f30ff885349e94.cache' timed out
[ Sep 27 2009 10:14:50 ] Generation of 'var/xxx/cache/content/xxx/1/100-3235a020a1be5aa5d5f30ff885349e94.cache' timed out
and so on... all the time. I am using the ezFS2FileHandler to make use of the stale cache advantages and it has been working good for months... When checking in the var/content cache directory I also noticed that many of the file generation dates when doing ls -la in the system was '1977-05-25'... I have now removed the whole content cache, and all new cache files are generated with a correct filedate. However, I still get loads of timeout warnings from the cache generation. I really need to sort this problem out, cant run the site on such a high load. If anyone has got an idea, ever so vague, you are welcome to share it with me, as I am running out of my own ones.... Otherwise, I guess next step is do dive in to the eZFS2FileHandler code....
Best regards, /Nicklas
Nicklas Lundgren, Managing Director
Novitell AB, Sweden
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