Gary
how can I reproduce this meMory issue?
Luca
Il giorno 25/giu/2009, alle ore 23.06, "Gary Gatten" <[email protected]
> ha scritto:
Ps - I have trace level at 5 and nothing interesting in the logs.
Also, it *appears* as though memory isn't being freed. I have a/v
scanners that cause ntop to see upwards of 30,000 hosts for brief
periods every 4 hours. Obviously it must allocate memory for these,
but after they are purged the memory should be released right? I
don't have "purge cache" or whatever enabled - I can't get it to
compile with that option set.
From: [email protected]
To: [email protected] ; [email protected]
Sent: Thu Jun 25 15:54:37 2009
Subject: [Ntop] Race condition in 3.3.10?
STILL trying to track down high CPU load since the upgrade to
3.3.x. This morning one of my nTop instances that normally runs <
10% (even on 3.3.10) jumped to about 50%. It might go even higher
but I have another instance also running at 50% - it was 90% before
this one jumped.
Anyone, the netflow thread is usually number 5 – and in this case is
as well. The thread taking all the CPU is number 1, which is typic
ally the “main” process. Thread 1 and 5 are usually the busiest,
but when thread 1 is taking roughly 10x the cpu as thread 5, somethi
ng is wrong.
I’m thinking it was running along all fine and happy until some set
of conditions occurred that caused it to freak out – some sort of ra
ce / locking issue? Nothing changed “significantly” in my
network to account for the 5 – 10 fold jump in util for this instanc
e. Roughly the same number of flows, pps, hosts, sessions, etc. It
was 5%, then bang – 50% and been there ever since…
I CAN attach to this with gdb and look at stuff – if someone smarter
than me can assist. I can make since of SOME of the gdb output, bu
t not having a strong development / debugging background is limiting
me.
TIA!
Gary
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