We'd like to seek out your expertise on postgresql regarding this error that we're getting in an analytical database.
Some specs: proc: Intel Xeon X5650 @ 2.67Ghz dual procs 6-core, hyperthreading on. memory: 48GB OS: Oracle Enterprise Linux 6.3postgresql version: 9.1.9 shared_buffers: 18GB We're doing a grouping query like this: create table test as select col1, max(col2), max(col3), max(col4), max(col5) from view where ... and ... and ... group by col1; The view queries another view that does a lot of UNION ALLs of tables. This particular case I'm dealing with about 60 tables unioned together. The resulting error is: ERROR: out of memory DETAIL: Failed on request of size ??? The issue seems a straight match with this link I found online: http://stackoverflow.com/questions/11878035/postgresql-9-1-out-of-memory-during-create-table-as-select After doing a lot of googling, I've tried setting FETCH_COUNT on psql AND/OR setting work_mem. I'm just not able to work around this issue, unless if I take most of the MAX() functions out but just one. Would anyone give me some hints on how to resolve this issue? Brian
