How to optimally configure memcache running on 16 cores 144G ram server?

Posted by Ivko Maksimovic on Server Fault See other posts from Server Fault or by Ivko Maksimovic
Published on 2012-09-14T04:15:08Z Indexed on 2012/09/14 15:40 UTC
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configuration

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memcached

Memcache is the only important app running on the server
Server has 16 cores and 144G RAM
Memcache is given 135G
Memcache runs at 32 threads
Gigabit network, test shows at least 300Mbit/s availability on network port
600 connections
3000 requests per second
Say that memcache (memory) usage is at 50% - it's definitely not full

As we increase number of requests towards server, requests slow down (from 8ms to 100ms per request) but server load remains 0.00. We suspect this can be solved by adjusting configuration but we don't understand many of the configuration parameters (besides, maybe, the number of threads).

Any ideas?

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