Oleg Bartunov <oleg@sai.msu.su> writes: > I see that pgsql_tmp/ contains files, looks like clustered table. > What postmaster is doing if disk usage doesn't changed ?
Most likely doing a disk-based merge sort ...
regards, tom lane
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TIP 9: the planner will ignore your desire to choose an index scan if your
joining column's datatypes do not match
