On Thu, Nov 17, 2005 at 06:47:09PM +0100, Guillaume Smet wrote: > queries are executed fast even if they are complicated but sometimes and > for half an hour, we have a general slow down. Is it exactly half an hour? What changes at the time that happens (i.e. what else happens on the machine?). Is this a time, for example, when logrotate is killing your I/O with file moves? A -- Andrew Sullivan | ajs@xxxxxxxxxxxxxxx I remember when computers were frustrating because they *did* exactly what you told them to. That actually seems sort of quaint now. --J.D. Baldwin ---------------------------(end of broadcast)--------------------------- TIP 9: In versions below 8.0, the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match