Recommended setup with large cache memory
Attila Nagy
bra at fsn.hu
Thu Sep 8 14:44:12 UTC 2005
Hello,
I would like to ask, what is the recommended setup, where large cache
memory is configured to the named process. In this case large means
about 1-1.5 GB.
The problem is that if I set a max-cache-size to a high value, the
purging of old records (default cleaning-interval every 60 minutes)
takes minutes even on a fast machine. (2.6 GHz Opteron).
During this time the server responds very slowly, if at all.
If I set cleaning-interval to 0 (or increase to days for example), the
used memory grows above the configured limit. I guess if it reaches the
physical limit, it will begin swapping, but I don't want to see it.
Wouldn't a simple LRU, or even a random drop method would better than
this regular pruning which bogs down the machine for minutes?
Will this change in 9.4?
Thanks,
--
Attila Nagy e-mail: Attila.Nagy at fsn.hu
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