Hello,

> i have a table with only 1 record. i run updates like "update
> field=field+? where pk_id=?" on this record. the updates are
> executed by one process, and come in transactions which include
> about 1000 updates. while the first transaction takes about 1.5sec
> the 100. transactions takes up to 15sec. and it gets slower and
> slower. what could be the reason for this ? my first guess was the
> mga , but there are no concurrent transactions, since the statements
> are executed sequentially by just one process. does anybody know
> what is causing this decrease in performance?

Do you commit the transaction?

Do you have a read transaction opened?

Take a look at the transaction counters with "gstat" and post
them here.

With regards,

Martijn Tonies
Database Workbench - developer tool for InterBase, Firebird, MySQL & MS SQL
Server.
Upscene Productions
http://www.upscene.com