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[AIX 5.3] P520 Upgrade gives Paging Faults?

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ROOTVG > Hardware > Power5 > [AIX 5.3] P520 Upgrade gives Paging Faults?

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	Author	Topic: [AIX 5.3] P520 Upgrade gives Paging Faults? (Read 567 times)
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Michael

Administrator
Hero Member

Posts: 526

Re: [AIX 5.3] P520 Upgrade gives Paging Faults?

« Reply #1 on: August 15, 2008, 12:15:03 PM »

A page fault is not an error. Page fault is the term used to indicate that a page was desired that was not in memory. AIX 5.3 uses a bit more memory, and 64bit mode uses more memory still. Not a lot, but it might change your statistics a bit.

However, based on the amount of free memory, I suspect it is just your application's loading memory overtime.


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Maarten Visser

New Member

Posts: 3

[AIX 5.3] P520 Upgrade gives Paging Faults?

« on: August 12, 2008, 08:11:46 AM »

I upgraded 2 of our Production Machines from AIX 5.2 to AIX 5.3 (numerous of reasons it just had to go after 1,5 year).
It isn't really a verry big deal but it get's my attention now that i get a lot of Paging Faults at "topas" and vmstat.
I just want to know if my values are a reason to concern or that it's normal behaviour.

For explanation:

System Model: IBM,9111-520
Processor Type: PowerPC_POWER5
Number Of Processors: 2
Processor Clock Speed: 1499 MHz
CPU Type: 64-bit
Kernel Type: 64-bit
Memory Size: 15808 MB
Good Memory Size: 15808 MB
Platform Firmware level: SF240_338
Running Oracle 9.2.0.7 with 15 Databases.

vmstat output:
kthr memory page faults cpu
----- ----------- ------------------------ ------------ -----------
r b avm fre re pi po fr sr cy in sy cs us sy id wa
0 0 1960455 135771 0 0 0 0 0 0 359 5165 1674 3 8 88 1
1 0 1960455 135771 0 0 0 0 0 0 1573 20354 5944 16 35 48 0
1 0 1960455 135771 0 0 0 0 0 0 384 6090 1867 10 10 80 1
0 0 1960451 135775 0 0 0 0 0 0 624 9166 2713 4 15 79 2
1 0 1960455 135771 0 0 0 0 0 0 984 14998 4375 8 22 68 1
0 0 1960458 135768 0 0 0 0 0 0 83 1156 620 1 1 98 0
1 0 1960455 135771 0 0 0 0 0 0 167 2082 940 11 2 84 3

Topas:
Paging:
Faults 8466
..
...
PgOut 86
Sios 189

Can someone tell me that these vlaues are ok? Roll Eyes