From: Charles Gagnon (charlesg@unixrealm.com)
Date: Mon Dec 13 2004 - 11:27:15 EST
I have a homegrown Java app that needs access to a large amount of
data as fast as possible.
We tried storing everything to disk but we end-up building an IO
queue and after a while, the system was spending 50% of its time in
IO wait.
We decided going to memory would be faster. But the data we store
(in multiple little files) is larger then the memory portion
available to tmpfs (I currenlty have 4GB ram, 8GB swap but I could
add more and I need to store abotu 10GB of data) so I end up with:
WARNING: tmp_memalloc: tmpfs over memory limit
And my app bugs out.
I could change tmpfs:tmpfs_maxkmem in /etc/system but would I end
filling up the physical memory completly which would slow down the
system badly, no?
The data:
RAM 4GB
SWAP 8GB (but I could add as much as 73GB)
DATA ~ 8-10GB
What I would like to do is have say 25% of the physical memory
allocated to tmpfs BUT let tmpfs overflow into disk swap without
warning me. I can add as much swap as I want on there as I have the
drive capacity.
How would that be configured?
-- Charles Gagnon | My views are my views and they http://unixrealm.com | do not represent those of anybody charlesg at unixrealm.com | but me. The concept of bedtime is entirely in contradiction to the practice of modern-day computing. One of them has got to go! _______________________________________________ sunmanagers mailing list sunmanagers@sunmanagers.org http://www.sunmanagers.org/mailman/listinfo/sunmanagers
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