From: Jonathan Williams (jonathw@shubertorg.com)
Date: Thu Jun 23 2005 - 12:32:37 EDT
I was told to send out the following:
We are running IDS 9.40.FC5 and have the following 3 Alpha Tru64 systems
with Unix 5.1B, Patch Kit 4.
Royale: GS1280
8 - 1.3 EV7 CPU's
8 - gigs of memory
Broadhurst: ES80
8 - 1.0 EV7 CPU's
8 - gigs of memory
Majestic: ES45
4 - 1.25 EV6 CPU's
8 - gigs of memory
We have a multi-tier in house application so the database never has more
than 95 connections.
We use processor affinity (1-7 for 8 cpu and 1-3 for 4 cpu).
The systems are connected with a gigabit switch (Cisco 4006).
When using different configurations, the resulting throughput speed makes no
sense to us.
1) Royale application server - Majestic db server - fastest combo
2) Broadhurst application server - Majestic db server - 2nd fastest
3) Royale application server AND db server - much slower than the previous 2
configurations
4) Broadhurst application server - Royale db server - slower than
configuration #3
At all times the systems are at least 50% idle and usually 75% idle when
volume is heavy and timing tests were done.
All timings done with the exact same physical disks (2 spindles in a SAN we
configure to the db server).
We would have thought that configuration 3 would be by far the fastest.
We notice 'delays' when it appears that IDS completely stops for 4 or 5
seconds with configuration 4, but only 1 second
with configuration 3. 'Delay' is defined as all our applications stop (even
dirty read only) like they are all waiting for the db. There are more
delays than checkpoints.
It appears to us that Royale runs slower and communicates slower than
Majestic when it is a db server but is much faster than Majestic as an
application server.
Does anyone have any ideas why our fastest, newest computer Royale would run
slower than the 4 cpu with slower CPU's?
Thanks in Advance
Jonathan Williams
UNIX Systems Admin.
The Shubert Organization, Inc.
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