[Pdns-users] Constantly increasing memory usage

[admin at cu.cc]

Hello,

I am not sure is this is the right email to contact, but here is my issue:
We are using power dns 2.9.21 (We had that installed for us, so I am not 
100% sure if this is really the exact version, is there a way to 
check?). The installation is myslq backended running on centos-5-x86_64 
VPS. We are offering a free domain registration and have more that 20 
000 domains for which provide free DNS services. The problem is that in 
the last few weeks when the server is started its ram would constantly 
increase until it reached 10GB and our VPS crashed. Once we run the 
command /etc/init.d/pdns restart the ram of the VPS gets back to normal 
levels of 700-1000 MB. This was happening every 2-3 hours yesterday and 
we were forced to set a cronjob that would restart pdns every hour to 
avoid server downtime, but it is not a permanent resolution. I have read 
in forums people discussing that this is a bug which is caused by failed 
MySQL connections that are not completely closed and gather with the 
time and little by little consume the whole server memory. This was 
mainly noticed on configurations with less traffic. The difference with 
us however is that we have around 10K visitors per day on our main site 
only, so I am not sure if the problem is identical.
Please advise how to resolve this issue.

Best regards,
Preslav