On Sat, 2007-03-31 at 17:45 +0530, Pavan Deolasee wrote: > > Isn't CREATE INDEX CONCURRENTLY prone deadlock conditions ? > I saw one with VACUUM today. But I think it can happen with other > commands like VACUUM FULL, CLUSTER, CREATE INDEX > CONCURRENTLY and so on. These commands conflict on the > ShareUpdateExclusiveLock held by CIC and hence would wait for > CIC to release the lock. At the same time, CIC would wait for these > transactions to complete. > > We know that these commands are run in a separate transaction > and do not do any index fetches or inserts/updates. So in principle > CIC need not wait for these transactions to complete in any > of its waits. May be we can skip waits on the transactions that > are running one of these commands.
Yes, because I proposed it already. :-) "utility transactions" in - Latest plans for Utilities with HOT -- Simon Riggs EnterpriseDB http://www.enterprisedb.com ---------------------------(end of broadcast)--------------------------- TIP 5: don't forget to increase your free space map settings
