On Tue, Dec 11, 2018 at 2:56 AM Ron <ronljohnsonjr@xxxxxxxxx> wrote: > 2018-12-07 06:21:55.504 EST 10.140.181.89(35868) CDS CDSLBXW 13748 SELECT > PostgreSQL JDBC Driver 53100 ERROR: could not write to tuplestore temporary > file: No space left on device > > I see this in the pg_log file, but #1 can't figure out what "tuplestore" is > (Google doesn't help), and #2 there's lots of space on all my file systems. > data/base, where pgsql_tmp lives, has 96GB free.) Maybe the setting log_temp_files could help you identify the query that is doing it? https://www.postgresql.org/docs/current/runtime-config-logging.html#GUC-LOG-TEMP-FILES -- Thomas Munro http://www.enterprisedb.com