Bind 9.3.0 strange behavior with memory on EL3

[phn at icke-reklam.ipsec.nu]

Michael Lang <michi+bind-users at relay3.jackal-net.at> wrote:
> Hi all,

> ive been reporting a problem previous, where Bind (9.3.0) goes on 99%
> CPU (Intel) and doesnt answer any more queries. I found that the IOStat
> was very high too, as the swapspace on IDE Discs wasnt performing good
> enough. The Machine has 1 GB Ram without doing any unusual stuff
> (default Services SSH, Local MTA, Syslog,...) except Bind. Ive
> configured to views with CacheLimits on 256MB for one and 8Mb for the
> other (Public is the big, the smaller is internal). Even these two
> Limits and the RSS and Size of the named process arent filling up the
> Memory, but the kernel starts to swap. Ive limited the Public View to
> 128MB for Cache, and the machine didnt start swaping. But today the
> Process again started to use 99% CPU and didnt response to any more
> queries. The Logfiles show up tons of Lines containing these records:

What OS ?  And why limit bind's availavle memory, you should 
not (imho) limit bind's cache, instead you should respect 
the TTL's given by the original owners.

> # grep 'still overmem' named.run
> 29-Oct-2004 07:05:41.648 cache cleaner: still overmem, reset and try
> again
> 29-Oct-2004 07:06:08.001 cache cleaner: still overmem, reset and try
> again
> 29-Oct-2004 07:06:34.244 cache cleaner: still overmem, reset and try
> again
> 29-Oct-2004 07:06:56.500 cache cleaner: still overmem, reset and try
> again
> 29-Oct-2004 07:07:16.570 cache cleaner: still overmem, reset and try
> again

> the didnt show up, earlyer (these log entrys have some time between, but
> on the critical time there where 250 Entrys in one second)

> I didnt find anything about such a problem on the Lists.
> Any suggestions ?

Remove cache limitations, install more memory.

> Kind regards
> Michael Lang

> -- 
> Michael Lang <michi+bind-users at relay3.jackal-net.at>



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Peter Håkanson         
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