From: Dermot Paikkos (dermot@sciencephoto.com)
Date: Wed Mar 03 2004 - 09:10:24 EST
Hi Managers,
SYS: DS10, Tru64 5.1 advfs 1280MB RAM
I am trying to fine tune the memory usage on our system and have hit
something that doesn't seem correct. The problem original stemmed
from the memory error when using ImageMagick.
I have recently increased the RAM on our server so was surprised to
find that the performance of IM was not boosted. vmstat (-P) shows a
lot of pages allocated to the unified buffer cache:
free pages = 8296
active pages = 7675
inactive pages = 7974
wired pages = 15303
ubc pages = 119873
==================
Total = 159121
I read that I can check the efficiency of the UBC by doing dbx -k
/vmunix and checking the hits and misses with a pd
ufs_getapage_stats. But when I try this I am getting a zero for all
struct {
read_looks = 0
read_hits = 0
read_miss = 0
alloc_error = 0
alloc_in_cache = 0
The ufs seems to indicate that this would only work with a ufs file
system and we are using advfs. Should I be using a different command
in dbx? Does the ubc pages above seems high? What is the best way to
reduce this if I should?
Thanx.
Dp.
~~
Dermot Paikkos * dermot@sciencephoto.com
Network Administrator @ Science Photo Library
Phone: 0207 432 1100 * Fax: 0207 286 8668
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