I was noticing it's mem usage in top. Resident memory is usually
less than 10k. It is also showing the high VM usage in /proc/
meminfo. We've been having some oom issues lately, and this caught
my eye as being not right. Not that VM would directly cause oom
condition, but it does seem like a bug as why would it need so much?
There might be a correlating bug that actually causes all the memory
to go resident at some strange time, which would cause an oom condition.
I did set the backend cache to 5 minutes, and the packet cache to 1
minute. most of our records never change, we just add to them so
this seemed a good way to reduce load. All other config options are
pretty much default.
What would/could it be allocating that much virtual memory for?
On Sep 20, 2007, at 2:54 PM, bert hubert wrote:
On Thu, Sep 20, 2007 at 02:52:50PM -0700, Stephen Manchester wrote:
I've been running PDNS server on CentOS 4.4 for about 3 months now.
I've noticed that PDNS allocates a LOT of virtual memory as it's
running, and never frees it up. It can do this at an incredibly fast
rate at times, as much as 2.9GB within 24 hours. Has anyone seen
this before and know why it might be happening?
Stephen,
How do you measure its actual usage?
The trick is to look at the 'RES' entry of 'top' for example.
Other measurements can be a tad confusing, I think due to the
static linking
we employ in our RPMs. The Kees Monshouwer RPMs might be better in
this
respect: ftp://ftp.monshouwer.com/pub/linux/pdns-server
Bert
--
http://www.PowerDNS.com Open source, database driven DNS Software
http://netherlabs.nl Open and Closed source services
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