[rrd-users] major remote performance regression for rrdcached 1.5

Steven Hartland killing at multiplay.co.uk
Sun Apr 10 02:43:10 CEST 2016

We updated to rrdtool 1.5.5 from 1.4 the other day and since then have 
noticed dramatic slow down.

I just did some benchmarks and talking to rrdcached over a network 
socket (same host) to do 862 fetches took 91.388106 seconds e.g.
FETCH 351918.rrd AVERAGE 1460244557 1460244917

The same over local unix socket took 0.097147 seconds so it looks like 
there's been a major performance regression in 1.5 from 1.4?

When we initially updated the client before our rrdcached server we did 
see errors with:
rrdcached: Unknown command: FETCH

So I'm wondering if rrdcached FETCH is new 1.5 hence the issue.

Previously we were running: rrdtool 1.4.8

Anyone got any ideas?


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.oetiker.ch/pipermail/rrd-users/attachments/20160410/052f4530/attachment.html>

More information about the rrd-users mailing list