Quries about vmstat

[Dolphin]

Hi,

- How do determine when the system is not enough memory when vmstat is
run?

Or

What reading should I expect when vmstat is run to indicate memory is
not enough?

- Solaris 10 with 8GB memory in a V490 server with 2 x CPU.

- Where can I find any document about how to determine the resources
are bottle neck?

Thanks in advance.

[Chris Cox]

Dolphin wrote:
> Hi,
>
> - How do determine when the system is not enough memory when vmstat is
> run?

huge amounts of page outs... shoot, even moderate page outs are a sign that
you need to add memory (memory being relatively cheap nowadays)

[Mark Round]

> huge amounts of page outs... shoot, even moderate page outs are a sign that
> you need to add memory (memory being relatively cheap nowadays)

Yup, and in addition to high numbers in that field, look for anything
in the "sr" field. That indicates the system is busy looking for pages
it can swap out - you should never see this unless you are in dire
need of more memory.

-Mark

[John L]

"Chris Cox" <ccox_nop...@airmail.net> wrote in message news:8f2dnWOcJ6_XitHX...@posted.internetamerica...

Now that i/o goes through the virtual memory system, it is more likely
a sign that your nightly backup is running, or that your DBA has got
bored and is running yet another query necessitating umpteen full table
scans.

Use vmstat -p and don't worry if you see only filesystem paging.

--
John.