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HP-UX 11.11 - large increase in system memory usage

 
Geoff Frost
Occasional Contributor

HP-UX 11.11 - large increase in system memory usage

Recently moved an application to an N4000 with 4GB memory running HP-UX 11.11 and have found that system memory grows from around 400MB at boot time to over 900MB. Buffer cache is limited to 10% (dbc_max_pct). Example of glance output -
B3692A GlancePlus C.03.20.00 10:26:18 uxd02 9000/800 Current Avg High
-------------------------------------------------------------------------------
CPU Util SSUUUUUUUUUUUUUUUUUUUU | 44% 16% 58%
Disk Util FFFFFFFFFFFFFFFF | 31% 50% 100%
Mem Util SSSSSSSSSSSUUUUUUUUUUUUUUUUUUUUUUUUUUUBBBBB | 86% 85% 86%
Swap Util UUUUUUURRRRRRRRRRRRRRRRRR | 50% 48% 50%
-------------------------------------------------------------------------------
MEMORY REPORT Users= 167
Event Current Cumulative Current Rate Cum Rate High Rate
--------------------------------------------------------------------------------
Page Faults 19 452358 4.2 104.4 3990.9
Page In 1 155389 0.2 35.8 2004.2
Page Out 0 0 0.0 0.0 0.0
KB Paged In 0kb 4.9mb 0.0 1.1 319.2
KB Paged Out 0kb 0kb 0.0 0.0 0.0
Reactivations 0 0 0.0 0.0 0.0
Deactivations 0 0 0.0 0.0 0.0
KB Deactivated 0kb 0kb 0.0 0.0 0.0
VM Reads 0 409 0.0 0.0 24.8
VM Writes 2 2994 0.4 0.6 7.1

Total VM : 2.56gb Sys Mem : 932.0mb User Mem: 2.14gb Phys Mem: 4.00gb
Active VM: 813.3mb Buf Cache: 409.6mb Free Mem: 562.1mb

When system boots, Sys Mem is around 400mb.

Any ideas on why Sys Mem grows so much?
(on the old server - K260 with 2GB memory, Sys Mem was always around 170mb)
1 REPLY 1
Marc Dijkstra
Trusted Contributor

Re: HP-UX 11.11 - large increase in system memory usage

My last response would not go thru.. try again.

Try:
UNIX95= ps -e -o ruser,vsz,pid,ppid,args|sort -rnk2|more

This gives the total mem usage/process
MND
"A computer lets you make more mistakes faster than any invention in human history - with the possible exceptions of handguns and tequila"