From: Bertus Bekker (BertusB@discovery.co.za)
Date: Thu Mar 25 2004 - 02:26:22 EST
We have experienced severe performance problems when upgrading from Solaris
8 to 9, to such an extent that we had to roll back.
Environment:
Sun Fire 15K, MPO capable expander boards
36 CPUs (32 * 1200 MHz, 4 * 1050 MHz)
144GB memory (9*16GB)
Solaris 8 (2/02 based) KP 27
CPU utilization High 90s during peak hours (<5% idle)
No memory contention
One other small domain on same 15K chassis.
EMC DMX2000 SRDF'd synchronously to EMC 8830
Approximately 3TB of Oracle database
EMC powerpath controls 6 channels
Veritas DB edition
No I/O bottlenecks on disk
Network connections across two 2222A 100 Mb/s cards (ce driver)
Load split between cards about 80/20. Busiest NIC 85% busy.
Oracle 8i 8.1.7 32 bit
2 Instances, each about 5000 connections
Online applications mainly created in Magic 8 (running on user's PCs)
A few Magic 5 users.
Batch applications mainly written in C (virtually no batch during peak
hours)
Many 'component servers' also running Magic applications to do background
processing during all hours
Typical end user response time 4 to 5 seconds
Change:
When we switch to Solaris 9 KP 11(built on a fresh install from 4/03 media),
CPU utilization never reaches 100%
End user response time goes up to 20 seconds
Oracle shows SQL*Net waits
(Oracle relinked, tried with and without MPO enabled, Solaris 8 TCP tuning
parameters tried, ce driver parameter changes tried)
Anyone out there with that has had a similar experience or that has some
idea of what the problem might be?
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