On 2012-08-27 22:31, Skylar Thompson wrote:
Why exactly do you want to waste RAM on dead code/data? It served
its purpose, it should get out of the way and let something
productive use the RAM.
It can be a real problem for latency-sensitive applications that are
cohabiting on a system that's also doing heavy I/O. For instance,
IBM's TSM database process (often consuming 75% of the physical memory
of the machine for indices) often becomes paged out during heavy
I had forgotten about that. This is a really good example.
On a regular server (not a backup server), with the default swappiness value,
and a backup software that cycles between full and incremental, all our apps
were slow the morning after the full backup, same scenario every week.
swappiness = 0 solved this issue.
--
Yves. http://www.SollerS.ca/
http://ipv6.SollerS.ca
http://blog.zioup.org/
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