CPU Utilization by the mogilefsd process

Nathan Schmidt 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.
> Thanks,
> -Carl

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