Bill Moran <[EMAIL PROTECTED]> writes:
> In response to David Brain <[EMAIL PROTECTED]>:
>> I am curious as to why 'top' gives such different output on the two
>> systems - the datasets are large and so I know I benefit from having
>> high shared_buffers and effective_cache_size settings.
> Have you done any actual queries on the new system? PG won't use the
> shm until it needs it -- and that doesn't occur until it gets a request
> for data via a query.
More accurately, top won't consider shared mem to be part of the process
address space until it's actually touched by that process.
regards, tom lane
---------------------------(end of broadcast)---------------------------
TIP 9: In versions below 8.0, the planner will ignore your desire to
choose an index scan if your joining column's datatypes do not
match
