Ok found the cause, does seem FETCH support was added rrdcached in 1.5
and Nagle wasn't being disabled on the network socket so every request
was seeing a 0.1 second delay in completion.
PR to fix can be found here: https://github.com/oetiker/rrdtool-1.x/pull/706
Testing here showed this dropp
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 l
