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Tuning the unified buffer cache

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Tuning the unified buffer cache

Subject: Tuning the unified buffer cache
From: Joel Reymont <email@hidden>
Date: Sun, 2 Mar 2008 03:04:19 +0000

Folks,

I'm working with expensive software to parse a 5-300Gb csv file and write out each column as a separate binary file. I'm running 10.5.2.

I find that I cannot process my huge files without running 'purge' a few times throughout processing to clear the cache and return occupied memory. Otherwise, the cache takes over memory and heavy swapping starts.

I understand that a 'no cache' option is available in the open call but I don't have access to the source code of the software I'm working with.

Is there a command line tool or a set of system calls I can use to limit the size of the cache to a certain amount of memory?

Would setting kern.maxvnodes with syscntl help here?

	Thanks, Joel

--
http://wagerlabs.com

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