Sven Willenberger wrote: > OK, that I do see; I guess I never noticed it on the other (i386) > machine as the memory never exceeded the max amount allowed by the > tunables. That raises a question though: > > Using identical data and identical queries, why would the amd64 system > using postgresql 8.1.3 be using some 2/3s more memory to store the > query results before output than the i386 system using postgresql > 8.0.4? > > amd64 system: > PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU CMD > 8193 svenw 1 5 0 1516M 1475M ttyin 1 0:15 0.00% psql > > i386 system: > PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU CMD > 61263 svenw 1 5 0 972M 956M ttyin 2 0:27 0.00% psql > > These are the final stages after the file has flushed (this was run on > the prior month's data which had fewer results). This would either > point to an issue with a) amd64 memory allocation or b) palloc > interacting with 64bit memory or c) some other change. My suspicion is that it has to do with pointers being 8 bytes vs 4 bytes in amd64. -- Larry Rosenman Database Support Engineer PERVASIVE SOFTWARE. INC. 12365B RIATA TRACE PKWY 3015 AUSTIN TX 78727-6531 Tel: 512.231.6173 Fax: 512.231.6597 Email: Larry.Rosenman@xxxxxxxxxxxxx Web: www.pervasive.com
