CPU Utilization by the mogilefsd process
nschmidt at gmail.com
Wed Feb 7 22:58:46 UTC 2007
[reply to the list this time...]
I ran into two mogilefsd resource-consumption surprises with our
system so far:
1) We ran out of connections on the mysql servers -- root cause was
flapping on our heartbeat-HA setup (both servers claimed the high-
availability IP address) and so the trackers kept opening new
connections when mysql didn't respond as expected. My fault but good
to know that's what happens.
2) A syntax error result from mysql (while I was fiddling with
Store.pm) caused a fast retry loop and mogilefsd spun at 100% cpu
trying to read back its test-write files. Again my fault, but other
classes of sql error apart from syntax errors may lead to this behavior.
-Nathan / PBwiki
On Feb 7, 2007, at 12:01 PM, Carl Forsythe wrote:
> Hi all,
> On our trackers I see one mogilefsd process in top (the parent
> process) sitting at 100% cpu utilization, is this typical behavior
> for the parent mogilefsd? The tracker platform is CentOS 4.4 64 bit
> running on AMD Opteron processors.
More information about the mogilefs