Thomas Poty wrote: > This morning, when I arrived to my desk. PostgreSQL had crashed. > > I try to inspect the log file but its size about 27G and i cannot check it. Why? The interesting entries are probably towards the end of the file. > So, in order to try to reduce log i wonder which configuration about logging is a good compromise between quantity and quality. > > Here is my configuration,: > > select name,boot_val,reset_val from pg_settings where name ~ 'log'; > name | boot_val | reset_val > -----------------------------+--------------------------------+------------------------- > log_autovacuum_min_duration | -1 | -1 > log_checkpoints | off | off > log_connections | off | on > log_destination | stderr | stderr > log_directory | pg_log | pg_log > log_disconnections | off | on > log_duration | off | off > log_error_verbosity | default | default > log_executor_stats | off | off > log_file_mode | 384 | 384 > log_filename | postgresql-%Y-%m-%d_%H%M%S.log | postgresql-%Y-%m-%d.log > log_hostname | off | off > log_line_prefix | | %t [%p]: [%l] %u@%d > log_lock_waits | off | off You want "on". Locks that last more tham a second are a problem. > log_min_duration_statement | -1 | 1000 > log_min_error_statement | error | error > log_min_messages | warning | warning These two are what you want to change. Set log_min_messages and log_min_error_statement to 'log'. > log_parser_stats | off | off > log_planner_stats | off | off > log_replication_commands | off | off > log_rotation_age | 1440 | 1440 > log_rotation_size | 10240 | 10240 > log_statement | none | none > log_statement_stats | off | off > log_temp_files | -1 | -1 You should set this to some positive value to see if many of your statements need to write temporary files and increasing work_mem would be a good idea. > log_timezone | GMT | Europe/Luxembourg > log_truncate_on_rotation | off | off > logging_collector | off | on > syslog_facility | local0 | local0 > syslog_ident | postgres | postgres > wal_log_hints | off | off > (31 rows) Yours, Laurenz Albe
