On Thu, 2005-07-14 at 15:08 +1000, Alison Winters wrote: > Hi, > > Our application requires a number of processes to select and update rows > from a very small (<10 rows) Postgres table on a regular and frequent > basis. These processes often run for weeks at a time, but over the
Are these long running transactions or is the process issuing many short transactions? If your transaction lasts a week, then a daily vacuum isn't really doing anything. I presume you also run ANALYZE in some shape or form periodically? > space of a few days we find that updates start getting painfully slow. > We are running a full vacuum/analyze and reindex on the table every day, If they're short transactions, run vacuum (not vacuum full) every 100 or so updates. This might even be once a minute. Analyze periodically as well. -- ---------------------------(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