Обсуждение: Index relation size
Hi, I have table with size ~35 MB, it has several indexes and couple of them are well over 500 MB in size (they are indexes with 3-4 columns involved, with datatypes like varchar, int4 , timestamp, boolean). Database is VACUUMed nightly, version is 7.2.4 (cant upgrade to newest version at the moment). Are these index sizes indicating some problems with our Postgres server? Rigmor Ukuhe --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.779 / Virus Database: 526 - Release Date: 19.10.2004
Rigmor Ukuhe wrote:> Hi,>> I have table with size ~35 MB, it has several indexes and couple of them are> well over 500 MBin size (they are indexes with 3-4 columns involved, with> datatypes like varchar, int4 , timestamp, boolean).> Databaseis VACUUMed nightly, version is 7.2.4 (cant upgrade to newest> version at the moment). Are these> index sizes indicatingsome problems with our Postgres server? If you do not vacuum full, this is normal. Using a version > 7.4 then a normal vacuum "shall" be enough. Regards Gaetano Mendola
On Mon, 2004-10-25 at 05:02, Rigmor Ukuhe wrote: > Hi, > > I have table with size ~35 MB, it has several indexes and couple of them are > well over 500 MB in size (they are indexes with 3-4 columns involved, with > datatypes like varchar, int4 , timestamp, boolean). > Database is VACUUMed nightly, version is 7.2.4 (cant upgrade to newest > version at the moment). Are these > index sizes indicating some problems with our Postgres server? Assuming you aren't suffering from index bloat, which was a problem in 7.2, this may be normal. To see if you are, try "reindex indexname" and see if the index shrinks. Multicolumn indexes being bigger than their table because of the way they're put together, so it's likely that when you get done reindexing the index will still be bigger than the table.