RE: no. of users supported
- From: "Subbiah, Nagarajan" <Nagarajan.Subbiah@xxxxxxxx>
- To: 'oracle list' <oracle-l@xxxxxxxxxxxxx>
- Date: Thu, 29 Sep 2005 13:27:33 -0400
It also depends on the processor speed. WE used to have issues with 8 -
400MHZ CPU with less than 100 connection and mostly select queries. Assuming
your hit ratio is close to 100% and with the average run time of the all the
queries are less than 20 milliseconds, I don't see any issues with 2 - 1GHZ
processor supporting at least 50 users.
-----Original Message-----
From: Dennis Williams [mailto:oracledba.williams@xxxxxxxxx]
Sent: Thursday, September 29, 2005 1:00 PM
To: raja4list@xxxxxxxxx
Cc: Allan Nelson; oracle list
Subject: Re: no. of users supported
Raj,
> The database is a complete read activity. not much inserts.
In general you are correct that only selects will reduce the server load,
meaning the server should be able to support more users. But there are
several additional issues:
- Are the queries just retrieving a few rows through indexes, or are
full-table scans required?
- Do most of the queries go after the same data, so the popular block are
cached in memory, or even use Materialized Views? Or will the queries want
data all over the database? What is the I/O subsystem like? You may be
better off putting more money in the I/O subsystem than the server.
I have seen Solaris servers easily supporting the number of users you have
mentioned.
Dennis Williams
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