system memory high

Daniel Bilsborough — Mon, 12 Nov 2007 21:37:53 GMT

Im using HPUX 11.23 on rx8640 and it seems to have very high usage of system memory (taken from glance mem report)

Sys Mem: 18.4gb
User Mem: 70.0gb
Phys Mem: 95.8gb
Buf Cache: 981mb
Free Mem: 6.5gb

The system has 3 cell boards and 1 NPAR running 4 SAP development instances and a standby DR instance that is not actively used.

I've downloaded the kmeminfo tool from WTEC and it broke it down into the following:

----------------------------------------------------------------------
Physical memory usage summary (in page/byte/percent):

Physical memory = 25115380 95.8g 100%
Free memory = 2897600 11.1g 12%
User processes = 18114738 69.1g 72% details with -user
System = 4024111 15.4g 16%
Kernel = 3772958 14.4g 15% kernel text and data
Dynamic Arenas = 2421606 9.2g 10% details with -arena
vx_inode_cache = 771293 2.9g 3%
VFD_BT_NODE = 262990 1.0g 1%
vx_global_pool = 253102 988.7m 1%
vx_buffer_cache = 156992 613.2m 1%
vx_rwsleeplock_ = 146926 573.9m 1%
Other arenas = 830303 3.2g 3% details with -arena

Looks like the kernel itself it taking up most of this space. Is there anyway to reduce the amount used?

Daniel.

Re: system memory high

whiteknight — Tue, 13 Nov 2007 00:42:32 GMT

Daniel,

Sys Mem: 18.4gb
User Mem: 70.0gb
Phys Mem: 95.8gb
Buf Cache: 981mb
Free Mem: 6.5gb

from your kmeminfo, your system is healthy. 16% is system memory is fine and normal.

You can decrease the vx_ninode to release more memory. See the article below
refer to:-
http://docs.hp.com/en/7779/commonMisconfig.pdf

WK

topic system memory high in Operating System - HP-UX

system memory high

Re: system memory high