Suya Huang <[email protected]> writes:
> Thank you Tom very much, thatâs the piece of information I miss.
> So, should I expect that the nested loop join would be much faster if I cache
> both tables (use pg_prewarm) into memory as it waives the disk read?
pg_prewarm is not going to magically fix things if your table is bigger
than RAM, which it apparently is.
regards, tom lane
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