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Sharing System Memory

Gamaliel
Frequent Advisor

Sharing System Memory

Hi Folks,

My server has 14 GB of physical Memory.

It's a database dedicated server.

It's running a Sybase ASE 15.0.1 database with 6 GB asigned.

The distribution of memory is:
5.3 GB System
1.4 GB Buffer
1.3 GB Free

I expected that I can give 10 GB to the database... so:
-) Have I misconfigured the server parameters so the system is wasting a lot of memory?
-) Is healthy to have the same amount of memory for the db and the system?

Best Regard from Mexico!
5 REPLIES
Dennis Handly
Acclaimed Contributor

Re: Sharing System Memory

What HP-UX version are you running? Are you up to date with your VM patches?

The system may be caching lots of data because you aren't making more demands on it?
Gamaliel
Frequent Advisor

Re: Sharing System Memory

Hi DH,

HP-UX 11.11

The database inside (within the 6 GB asigned) uses a cache area.
Dennis Handly
Acclaimed Contributor

Re: Sharing System Memory

>The database inside uses a cache area.

I was thinking about the buffer cache and other system caches.

>The distribution of memory is:

What tool did you use to get this?
John Guster
Trusted Contributor

Re: Sharing System Memory

please post the output of commands
1. /usr/sbin/kmtune|grep dbc
2. swapinfo -mat
Gamaliel
Frequent Advisor

Re: Sharing System Memory

Hi DH, JG,

The tool to mesure the memory is glance.

# kmtune|grep dbc
dbc_max_pct 10 - 10
dbc_min_pct 5 - 5
# swapinfo -mat
Mb Mb Mb PCT START/ Mb
TYPE AVAIL USED FREE USED LIMIT RESERVE PRI NAME
dev 4096 29 4067 1% 0 - 1 /dev/vg00/lvol2
dev 14000 29 13971 0% 0 - 1 /dev/vg00/lv_swap
reserve - 6037 -6037
total 18096 6095 12001 34% - 0 -