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