Re: [cobalt-developers] RaQ3 memory leak problems?

[Michael Stauber <devel@xxxxxxxxxxxxxx>]

Hi Gerald,

> Are, you sure it is the GLIBC patch?

It's the most likely source of troubles as the problems started right after 
applying that patch. No other system changes were made at that time. And 
after that patch was applied a lot of people started to have the same problem 
at the same time.

> I have RaQ3s and RaQ4s running with no issues.
> How do you know its not one of the cron jobs?

The thing here is as follows (see 
http://ns2.solarspeed.net/~mrtg/freemem.html) : Once the daily cronjob runs a 
lot of memory is freed up instantly and then it's sucked up while these 
cronjobs run. Once cron.daily is finished the available free memory drops to 
an all time low again and remains very low for the rest of the morning. 

At 10 am a cronjob of user root runs the PERL programm FCHECK with nicelevel 
-15 which parses the filesystem for changes. That one always has the effect 
to free up a lot of memory for unknown reasons. So between 6am (end of 
cron.daily) and 10 am (start of FCHECK) the server is always hovering close 
to a crash with next to no free memory going around.

> What are you running in cron daily, that might cause the problem?

That's very hard to tell. Aside from the usual stuff there is Webalizer, plus 
a shellscript which fetches the latest anti-virus definitions from Kaspersky 
Labs and a shellscript which dumps the MySQL database to a backup file on the 
hardisk.

Disabling Webalizer and the MySQL-backup didn't do a difference (tried that a 
while ago), so I'm a little clueless here.

-- 

Mit freundlichen Grüßen / With best regards

Michael Stauber
mstauber@xxxxxxxxxxxxxx
Unix/Linux Support Engineer