Duane Murphy wrote: > We are trying to improve performance by avoiding the temp file creation. > > LOG: temporary file: path "base/pgsql_tmp/pgsql_tmp8068.125071", size > 58988604 > STATEMENT: SELECT iiid.installed_item__id, item_detail.id, > item_detail.model_id, item_detail.type > FROM installed_item__item_detail AS iiid > INNER JOIN item_detail ON iiid.item_detail__id = item_detail.id > INNER JOIN item ON (item.installed_item__id = iiid.installed_item__id ) > INNER JOIN model ON (item.id = model.item__id AND model.id = $1)
> What are the causes of temp file creation? Operations like hash and sort that need more space than work_mem promises. > What additional information can I gather in order have a better understanding > of how to improve this > query? It woul be really useful to see the result of "EXPLAIN (ANALYZE, BUFFERS) SELECT ..." for your query. But essentially the answer to avoid temporary files is always "increase work_mem". Yours, Laurenz Albe -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
