Why Select Count(*) from table - took over 20 minutes?

[Ozz Nixon <ozznixon@xxxxxxxxx>]

I am the only user on this system right now, and one table select count(*) took over 20 minutes:

wikitags exists and has 58,988,656 records.

Structure (in pascal) is:

   quer.SQL.Add('create table '+DBTags+' (');
   quer.SQL.Add('   pagename '+SQL_TITLE+'(100) not null,');
   quer.SQL.Add('   tagword '+SQL_TITLE+'(15) not null,');
   quer.SQL.Add('   soundex2 '+SQL_TITLE+'(4) not null,');
   quer.SQL.Add('   metaphone '+SQL_TITLE+'(15) not null,');
   quer.SQL.Add('   metaphone2 '+SQL_TITLE+'(22) not null,');
   quer.SQL.Add('   carverphone '+SQL_TITLE+'(22) not null,');
   quer.SQL.Add('   instances '+SQL_INT32+' not null,');
   if SQL_NAME_PRIMARY_KEYS then quer.SQL.Add('   constraint '+DBTags+'_PK');
   quer.SQL.Add('   primary key(pagename, tagword, instances)');
   quer.SQL.Add(')');

where SQL_TITLE = 'varchar', SQL_IN32 = 'int'

I have hung off indexes for each column, to resolve my previous "performance" issue from 3+ weeks ago. However, COUNT() is still dog slow - this table is a write once, read many... *never* update, nor delete.

Any suggestions?
-- 
Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-general