[mythtv-users] linux updates suck
gull at gull.us
Mon Sep 10 17:29:30 UTC 2007
On Sep 10, 2007, at 10:19 AM, aaron wrote:
> I had been very hesitant to add paging space because the VMM would
> tend to favour caching the recording files and push useful things ---
> like Myth itself --- out to disk. It really slowed things down. I'm
> not sure whether there were changes made in Myth or the kernel, but it
> doesn't behave nearly as badly now.
This is one of the things they improved in the 2.6 kernels. They
also added a user-tunable knob, /proc/sys/vm/swappiness, so you can
tweak how aggressively stuff is paged out to make room for cache.
The range is from 0 to 100, with 0 being the least aggressive (cache
always loses.) The default on most distributions seems to be 60.
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