[collectd] Preventing collectd high memory usage

[Vaughn Wernersbach]

Hi André Luiz da Silva!  Thanks for the suggestion.  I’ll keep switching to UDP in mind, though I’m inclined to stick with TCP if at all possible (largely to minimize the required changes to my environment).

All - Anyone have info on using CollectInternalStats?  Still need to know what value to set WriteQueueLimitHigh to and having collectd tell me definitely seems like the best bet.



Vaughn Wernersbach
BIDS Trading, L.P.

111 Broadway, Suite 1603 | New York, NY 10006
T: 212.618.2071 |  F: 212.618.2031  |  C: 732.397.8344  | E: vaughn.wernersbach at bidstrading.com<mailto:vaughn.wernersbach at bidstrading.com>

From: André Luiz da Silva [mailto:andresilvaluiz1 at gmail.com]
Sent: Monday, December 14, 2015 11:18 AM
To: Vaughn Wernersbach <Vaughn.Wernersbach at bidstrading.com>
Cc: collectd at verplant.org
Subject: Re: [collectd] Preventing collectd high memory usage


Hi, Wenersbach! Did you try to send your metrics over UDP instead of TCP? It's just a suggestion if you have a reliable network.



Regards.



Em 14/12/2015 1:54 PM, "Vaughn Wernersbach" <Vaughn.Wernersbach at bidstrading.com<mailto:Vaughn.Wernersbach at bidstrading.com>> escreveu:
Hi,

In order to limit high memory usage (one of my servers hit 94% for collectd) I’m interested in enabling the WriteQueueLimitHigh<https://collectd.org/documentation/manpages/collectd.conf.5.shtml#writequeuelimithigh_highnum> option, but I don’t know what value to use.  The docs suggest enabling CollectInternalStats<https://collectd.org/documentation/manpages/collectd.conf.5.shtml#collectinternalstats_false_true>, and that the “write_queue” plugin instance reports the info from CollectInternalStats that I’m looking for.  However, I don’t see any “write_queue” plugin nor do I see anything relevant being written by my existing write plugins (syslog and graphite) after enabling CollectInternalStats.


•         How do I obtain data written collected when setting CollectInternalStats to true?

•         Alternately, are there any guidelines for setting the values of WriteQueueLimitHigh?



Vaughn Wernersbach
BIDS Trading, L.P.

111 Broadway, Suite 1603 | New York, NY 10006
T: 212.618.2071 |  F: 212.618.2031  |  C: 732.397.8344  | E: vaughn.wernersbach at bidstrading.com<mailto:vaughn.wernersbach at bidstrading.com>


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