On Mon, 2009-12-14 at 16:39 -0500, Tom Lane wrote: > Simon Riggs <si...@2ndquadrant.com> writes: > > What is the best way of restricting the hash table to a maximum size? > > There is nothing in dynahash that will enforce a maximum size against > calling code that's not cooperating; and I'll resist any attempt to > add such a thing, because it would create a serialization point across > the whole hashtable.
No problem, just checking with you where you'd like stuff put. > If you know that you need at most N entries in the hash table, you can > preallocate that many at startup (note the second arg to ShmemInitHash) > and be safe. If your calling code might go past that, you'll need to > fix the calling code. It's easy enough to count em on the way in and count em on the way out. -- Simon Riggs www.2ndQuadrant.com -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
