On Thu, 2007-04-26 at 00:13 +0200, Listmail wrote: > By the way, about indexes : > > When you have a small table (say, for a website, maybe a few > tens of > megabytes max...) reindexing it takes just a few seconds, maybe > 10-20 > seconds. > It could be interesting, performance-wise, to tell postgres > not to bother > about crash-survivability of indexes on this table. Like temporary > tables. > Write nothing to WAL. If it crashes, on recovery, postgres would > reindex > the table. > btree indexing is so fast on postgres that I'd definitely use > this > feature. > I'd rather trade a minute of recovery versus less disk IO for > index > update. > > You could even do that for whole tables (like, web sessions > table) which > hold "perishable" data... That optimisation on mine/Heikki's todo for the next release. In some cases it can speed up recovery, as well as mainline performance. -- Simon Riggs EnterpriseDB http://www.enterprisedb.com
