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RFC: HPUX IA64 Pgsql 8.0.0beta3 benchmark data

From: "Ed L(dot)" <pgsql(at)bluepolka(dot)net>
To: pgsql-general(at)postgresql(dot)org
Subject: RFC: HPUX IA64 Pgsql 8.0.0beta3 benchmark data
Date: 2004-09-30 21:20:15
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-general
Attached is a set of performance measurements attempting to compare 32-bit 
executables against 64-bit executables using PostgreSQL 8.0.0beta3 on an 
Itanium box running HPUX B.11.23 with 16GB of RAM, dbc_max_pct = 20% 
(meaning a 3.2GB kernel buffer cache), and shmmax = 8gb.  I haven't 
analyzed the data in much depth yet.

The test script (also attached) was run with the postgresql.conf 
settings (also attached), except that max_connections and shared_buffers 
were varied as noted across the tests.  I used pg_bench to measure TPS 
(only numbers excluding connection time are included), and varied the 
number of concurrent connections, transactions per connection.  I have a log 
that shows raw output from pgbench if anyone cares for it, ask and I'll 
post it (30KB gzipped).

My own early observations are that the optimal setting for shared_buffers 
for 32-bit in these tests is around 8192, while for 64-bit its more like 
40K.  64-bit 8.0.0beta3 seems roughly equivalent in performance at the 
smaller end of the loads I tested, while at the heavier loads, its 
performance exceeded the 32-bit performance by a factor of 2.  These 
observations and all the test data come without any warranty, either 
expressed or implied, whatsoever.

I'd be interested in any further analysis or observations.


Attachment: results.20040930024413.gz
Description: application/x-gzip (14.9 KB)
Description: application/x-gzip (913 bytes)
Attachment: postgresql.conf.gz
Description: application/x-gzip (3.8 KB)

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