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Re: [Question #202826]: Carbon-cache holding back data

To: graphite-dev@xxxxxxxxxxxxxxxxxxx
From: Todd Dombrowski <question202826@xxxxxxxxxxxxxxxxxxxxx>
Date: Tue, 17 Jul 2012 23:35:59 -0000
Reply-to: question202826@xxxxxxxxxxxxxxxxxxxxx
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Question #202826 on Graphite changed:
https://answers.launchpad.net/graphite/+question/202826

Todd Dombrowski posted a new comment:
We are seeing the same issue with a new installation of 0.9.10, with a
similar setup:

carbon-relay > consistent-hashing back to 3 carbon-cache instances

We have MAX_UPDATES_PER_SECOND set pretty low (100) so our disks can
keep up without blocking procs, and see 3-6 PointsPerUpdate at the cache
level which corresponds directly with missing metrics in graphs. Seems
we don't always get the data from cache.

Some system details:

CentOS 5.4, Python 2.4

Django==1.3.1
MySQL-python==1.2.3
Twisted==11.1.0
django-tagging==0.3.1
hashlib==20081119
pysqlite==2.6.3
python-memcached==1.48
simplejson==2.0.9
txAMQP==0.6.1
whisper==0.9.10
zope.interface==3.6.7

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