Calls xargs with vacuumdb to do parallel (by table or by database) VACUUM

parallel_vacuum.sh

# Per database
psql -A0Xtc "SELECT datname FROM pg_database WHERE datname <> 'template0'" | xargs -P 12 -0 -I ? bash -c 'echo "`date`: started ?"; echo -e "SET vacuum_freeze_table_age TO 0;\\nVACUUM;" | psql -qX "?"; echo "`date`: finish ?"'

# Per table
psql -A0Xtc "SELECT oid::regclass::text FROM pg_class WHERE relkind IN ('r','m')" | xargs -P 12 -0 -I {} bash -c 'echo "`date`: started {}"; vacuumdb --analyze --table={} && echo "`date`: {}: OK" || echo "`date`: {}: FAILED!"'

# Vaccum (kind-of) freeze per table - prevents bug fixed on 9.3.2 (and some 9.1.x, 9.2.x)
psql -A0Xtc "SELECT replace(replace(oid::regclass::text, '\\', '\\\\'), '\"', '\\\"') FROM pg_class WHERE relkind IN ('r','m')" | xargs -P 12 -0 -I {} bash -o pipefail -c 'echo "`date`: started {}"; echo -e "SET vacuum_freeze_table_age TO 0;\\nVACUUM {};" | psql -qX && echo "`date`: {}: OK" || echo "`date`: {}: FAILED!"' | tee -a /tmp/vacuum.log