Re: cache limit

[William Lee Irwin III <wli@holomorphy.com>]

On Thu, Aug 21, 2003 at 09:49:45AM +0900, Takao Indoh wrote:
>>> Actually, in the system I constructed(RedHat AdvancedServer2.1, kernel
>>> 2.4.9based), the problem occurred due to pagecache. The system's maximum
>>> response time had to be less than 4 seconds, but owing to the pagecache,
>>> response time get uneven, and maximum time became 10 seconds.

On Thu, 21 Aug 2003 16:47:09 -0700, Mike Fedyk wrote:
>> Please try the 2.4.18 based redhat kernel, or the 2.4-aa kernel.

On Mon, Aug 25, 2003 at 11:45:58AM +0900, Takao Indoh wrote:
> I need a tuning parameter which can control pagecache
> like /proc/sys/vm/pagecache, which RedHat Linux has.
> The latest 2.4 or 2.5 standard kernel does not have such a parameter.
> 2.4.18 kernel or 2.4-aa kernel has a alternative method?

This is moderately misguided; essentially the only way userspace can
utilize RAM at all is via the pagecache. It's not useful to limit this;
you probably need inode-highmem or some such nonsense.


-- wli