Subject | Re: [ib-support] Repost: How to improve RDB$RELATION_CONSTRAINTS readings? |
---|---|
Author | Doug Chamberlin |
Post date | 2002-02-10T16:06:50Z |
At 02/10/2002 10:05 AM (Sunday), mmenaz wrote:
the whole table is most likely in memory cache all of the time. Therefore,
the fact that it is scanned many times may not be a real performance
problem. It more likely indicates simply that the data in the table is used
many times in your stored procedure and trigger logic.
Are you seeing a performance problem that you think points to this table?
Or, are you just looking at the access count and wondering what the need
for it is?
>... but aI suspect that the row count for this table is relatively low (hundreds) so
>huge number of unindexed reading to RDB$RELATION_CONSTRAINTS (588 for a 10
>rows
>result dataset).
>What does it mean? How I can have better performance on
>RDB$RELATION_CONSTRAINTS reading? (I mean, can I add indexes? Indexing what?)
the whole table is most likely in memory cache all of the time. Therefore,
the fact that it is scanned many times may not be a real performance
problem. It more likely indicates simply that the data in the table is used
many times in your stored procedure and trigger logic.
Are you seeing a performance problem that you think points to this table?
Or, are you just looking at the access count and wondering what the need
for it is?