SUMMARY: Server paging heavily - suggestions to fix?

From: Alan Bradley - CPX WC (AlanB@ComparexAfrica.co.za)
Date: Wed Jan 22 2003 - 01:57:38 EST


Hi All,

Apologies for the late summary.

Thanks to all who responded.

Basically even though the paging is high all other indicators are that the
server is running well. I have made some changes to the autoup and maxpgio
entries in /etc/system.
I am now waiting to see the effect.

Regards

-----Original Message-----
From: Alan Bradley - CPX WC [mailto:AlanB@comparexafrica.co.za]
Sent: Wednesday, January 08, 2003 2:58 PM
To: 'sunmanagers@sunmanagers.org'
Subject: Server paging heavily - suggestions to fix?

Hi All,

I have a server that is showing a lot of paging activity, but no swapping
activity.
The server is running multiple Oracle 8 databases.

The CPU usage never seems to get over +/- 70%.

The "other" indicators, e.g. I/O ,etc. seem to be high but okay.
I would appreciate any suggestions on what to look for or possible ways to
improve the paging problem.

Below is a sample output of running vmstat -p on the server:

/etc# vmstat -p

     memory page executable anonymous
filesystem
   swap free re mf fr de sr epi epo epf api apo apf fpi fpo
fpf

 9393784 1367696 1855 5458 0 0 0 0 0 0 0 0 0 8292 0
0
 9393528 1373968 1918 5297 0 0 0 0 0 0 0 0 0 10736 0
0
 9393512 1383744 1909 5449 0 0 0 0 0 0 0 0 0 10940 0
0
 9393648 1396600 1990 5185 0 0 0 0 0 0 0 0 0 11932 0
0
 9393848 1408800 2118 5232 0 0 0 0 0 0 0 0 0 12920 0
0
 9393744 1417152 2229 5336 0 0 0 0 0 0 0 0 0 13468 0
0
 9390224 1421416 1742 5467 4 0 0 0 0 0 0 0 0 9648 4
4

Below is a sample output of sar -p and also sar -w on the server:

/etc# sar -p

SunOS rhino 5.8 sun4u 01/08/03

00:00:00 atch/s pgin/s ppgin/s pflt/s vflt/s slock/s
12:00:00 665.67 12.27 89.99 2810.04 6024.73 0.00
12:20:00 646.26 15.81 79.31 2751.65 5909.94 0.00
12:40:00 679.39 3.85 72.49 2780.76 5966.14 0.00
13:00:00 603.40 0.66 5.54 2833.28 6063.48 0.00
13:20:00 1686.37 217.06 629.50 2731.26 5859.58 0.00
13:40:00 671.53 2.59 62.89 2846.79 6096.48 0.00
14:00:00 602.37 1.20 2.88 2842.18 6081.61 0.00
14:20:00 640.91 5.10 35.43 2846.30 6101.56 0.00
14:40:00 656.55 5.52 79.51 2716.22 5830.64 0.00

/etc# sar -w

SunOS rhino 5.8 sun4u 01/08/03

00:00:00 swpin/s bswin/s swpot/s bswot/s pswch/s
12:00:00 0.00 0.0 0.00 0.0 970
12:20:00 0.00 0.0 0.00 0.0 1288
12:40:00 0.00 0.0 0.00 0.0 1124
13:00:00 0.00 0.0 0.00 0.0 922
13:20:00 0.00 0.0 0.00 0.0 1267
13:40:00 0.00 0.0 0.00 0.0 839
14:00:00 0.00 0.0 0.00 0.0 831
14:20:00 0.00 0.0 0.00 0.0 886
14:40:00 0.00 0.0 0.00 0.0 863

Regards,
Alan.
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