Re: MAssive Performance hit after AIX 4.3 -> 5.2 upgrade!!

In article <1136499339.337592.173490@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>, christiancolborn <christiancolborn@xxxxxxxxx> wrote:
> we recently upgraded a clients old 1-way 333mhz AIX box from
> 4.3 to 5.2... now the machine is suffering SERIOUS performance
> problems.... it has basically slowed down to about 1/5 of its previous

What command did you use to measure the slowdown?

What application does the machine run?

> perf. capacity. other than the os upgrade, another disk was added, and
> a datavg was separated out from the (previously solitary) rootvg. no
> other apps were added, and there is no additional workload. i have run

Is the problem constant, or does it only pop up a couple times a day, at
certain times of the hour or day?

> BTW... heres the results of 'vmstat -v' and 'vmstat 1 20':
> # vmstat 1 20

This tells us that your CPU and disk is *extremely* bored.

So, next thing I would look at is network traffic and configuration, and
also, memory usage.

Can you also do these commands and post output:

# ps -efl|grep <application name>

# lsps -a

# svmon -G

# netstat -v en0|grep Media
(and for any other Ethernet interfaces that is enabled)

# time dd if=/dev/rhdisk0 of=/dev/null bs=64k count=10000
# time dd if=/dev/rhdisk1 of=/dev/null bs=64k count=10000
# time dd if=/dev/rhdisk2 of=/dev/null bs=64k count=10000
(and for any other drives in the system, assuming it's a few.
Each dd will take about 45 seconds to run.)

# netstat -i 1
(and cancel it after running for 10 seconds)

# netstat -in

-Dan
.

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