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webdev/gist:5122033

Created March 9, 2013 01:28
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Asynchronous AOF fsync is taking too long (disk is busy?). Writing the AOF buffer without waiting for fsync to complete, this may slow down Redis.
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webdev commented Mar 9, 2013

It's hard to say what's going on on the system. If I change appendfsync to no, the system runs happily, but the moment I turn it to everysec fsync starts taking too long.

Also appendfsync no doesn't really mean never, it still fsync's but only once a minute or 30 seconds, as often as OS permits.

What could I be looking at iostat, iotop, any other recommendations? BTW, your quick response is HUGELY appreciated.

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webdev commented Mar 9, 2013

Grrrr.... after all hopeless attempts to identify the problem I contacted Rackspace and they said we had 2 noisy neighbors and kicked them out for us.

Frustrating, time to make redis a less SPOF component.

Thanks for responding!

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