topas PgSp column vs. svmon output

[Jurjen Oskam]

Hi there,

I'm probably missing something *really* obvious, but I can't figure
out what the PgSp-column in topas means:

Name PID CPU% PgSp Owner
[...]
f60webm 4108444 3.7 21.2 oracle_p
[...]

Here, it shows "21.2" in the PgSp-column. Yet the
svmon output shows (taken immediately after quitting topas):

# svmon -P 4108444

-------------------------------------------------------------------------------
Pid Command Inuse Pin Pgsp Virtual 64-bit Mthrd LPage
4108444 f60webm 14610 3490 5379 34119 N N N
[...]

What does the "21.2" mean, and how does it relate to the svmon output?

Another process shows:

Name PID CPU% PgSp Owner
[...]
oracle 4796514 3.4 4.8 oracle_p
[...]

... and the svmon output of that process shows:

# svmon -P 4796514

-------------------------------------------------------------------------------
Pid Command Inuse Pin Pgsp Virtual 64-bit Mthrd LPage
4796514 oracle 164487 3495 78704 178909 Y N N
[...]


Here the topas PgSp number is less, but the svmon Pgsp number is higher. Is the
topas PgSp number some sort of relative number? If so, relative to what? Total
RAM in use, total virtual size? I've tried different things, but I can't deduce
anything consistent.

Thanks,

[Andreas Schulze]

Post by Jurjen Oskam
Hi there,
I'm probably missing something *really* obvious, but I can't figure
Name PID CPU% PgSp Owner
[...]
f60webm 4108444 3.7 21.2 oracle_p
[...]
Here, it shows "21.2" in the PgSp-column. Yet the
# svmon -P 4108444
--------------------------------------------------------------------------

-----

Post by Jurjen Oskam
Pid Command Inuse Pin Pgsp Virtual 64-bit Mthrd LPage
4108444 f60webm 14610 3490 5379 34119 N N

N

Post by Jurjen Oskam
[rest snipped...]

Hi Jurjen,

I think topas returns megabyte used while svmon returns number of 4K
blocks... However that does not help at all answering your question why
there are differences of size in your second example. Furthermore I am not
sure whether it does make a difference that your first example is 32 Bit
process while the second is 64 Bit (you said you tried different things so
you might have checked this yourself already). But what came to my mind
immediately when I read 'paging space' and 'topas" is that topas returns
wrong values for paging space on my 5.1 LPARs. Actually I stopped using
topas with 5L completely because it returned so much meaningless values that
I could not stand it. So I shall like to recommend that should you happen to
run 5.1 or 5.2 on this server try to check paging space size with probably
nmon and compare this to the svmon output. Just my 2 cent.

Regards,
Andreas