[CentOS] memory leak in Centos 4.1 and 4.0

Johnny Hughes mailing-lists at hughesjr.com
Mon Oct 3 19:14:30 UTC 2005


On Mon, 2005-10-03 at 16:43 +0100, Peter Farrow wrote:
> Centos 4.0 and 4.1 seem to have a memory leak somewhere and I can't find 
> out what is doing it.  I think it may be dovecot.
> 
> I have installed hundreds of Linux machines, centos/redhat/suse in the 
> past as firewalls and mail relays and use the same/similar  methodolgy 
> and config for each.
> 
> I have found that since Centos 4.0 and 4.1 came along machines that have 
> run well for years and months, suddenly and systematically start running 
> out of memory after a few weeks/months of uptime.
> 
> The symtpom is the load average goes up and up as the machine creeps 
> into swap usage and eventually the machine has to be rebooted....
> 
> this only happened with the introduction of Centos 4 and of course that 
> means Dovecot for the IMAP server....
> 
> hmmmm......
> 
> Anyone else seen this,

There are memory leak problems with all kernels before 2.6.9-11.EL

There may be some issues with that kernel too.

Update 2 for EL4 should be released fairly soon, it will have a newer
kernel that addresses some other memory leak issues.
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