Performance Degradation/anomaly?

From: Ed <junior_peon_at_yahoo.com>
Date: Fri, 13 Apr 2001 10:37:14 -0700
Message-ID: <F001.002E9468.20010413100653@fatcity.com>

Greetings all,

This is more of a tuning question. We have a pl/sql procedure doing inserts and updates to a very large table. This procedure process different groups of same types of data sequentially. The difference between these groups is with the volume of raw data.

When the procedure gets to process a large dataset
(large volume), the performance slows significantly.
However, it will speed up when it gets to process a smaller dataset.

The clincher: If I was to terminate and re-start the procedure the performance picks up for the same large dataset. It behave as though the buffer is "full" and the re-start seems to clear the buffer or any "cow webs" from previous session.

The procedure has been tuned. The target table has recently been defragmented. No other processes running concurrently.

We suspect the database needs tuning but do not know how to proceed. What should we be looking for? I am hoping to get suggestions on what to do to tune the DB. Appreciate any feedback.

Thanks very much,
Ed

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Received on Fri Apr 13 2001 - 12:37:14 CDT