I have an application that is prone to sudden, unscheduled high bursts of activity, and I am finding that the application design permits me to detect the activity bursts within an existing function. The bursts only affect 3 tables, but degradation becomes apparent after 2,000 updates, and significant after 8,000 updates.
I already know that a plain vacuum (without full, analyze, or free options) solves my problem. Since vacuum is classified in the documentation as an SQL command, I tried to call it using a trigger function on one the tables (they all have roughly the same insert / update rate). However, I just found out that vacuum cannot be called by a function. Vacuums done by a scheduler at 3AM in the morning are adequate to handle my non-peak needs otherwise. autovacuum sounds like it would do the trick, but I am on a WINDOWS 2003 environment, but I have Googled up messages that it still has various problems (in Windows) which won't be resolved until 8.1 is out. But I have a problem NOW, and the application is deployed around the world. QUESTION: Is there anyway anyone knows of to permit me to execute an operating system program (even vacuumdb) or possibly to add a C function to the library which would allow me to do this (I am not a C programmer, but have access to some persons who are)? Very important to me for performance reasons. Does anybody have some suggestions on the best path for me to take? ---------------------------(end of broadcast)--------------------------- TIP 5: don't forget to increase your free space map settings
