show all
name | setting | description
---------------------------------+--------------------------------+-------------------------------------------------------------------------------------------------------------------------------
add_missing_from | off | Automatically adds missing table references to FROM clauses.
allow_system_table_mods | off | Allows modifications of the structure of system tables.
archive_command | (disabled) | Sets the shell command that will be called to archive a WAL file.
archive_mode | off | Allows archiving of WAL files using archive_command.
archive_timeout | 0 | Forces a switch to the next xlog file if a new file has not been started within N seconds.
array_nulls | on | Enable input of NULL elements in arrays.
authentication_timeout | 1min | Sets the maximum allowed time to complete client authentication.
autovacuum | on | Starts the autovacuum subprocess.
autovacuum_analyze_scale_factor | 0.1 | Number of tuple inserts, updates or deletes prior to analyze as a fraction of reltuples.
autovacuum_analyze_threshold | 50 | Minimum number of tuple inserts, updates or deletes prior to analyze.
autovacuum_freeze_max_age | 200000000 | Age at which to autovacuum a table to prevent transaction ID wraparound.
autovacuum_max_workers | 3 | Sets the maximum number of simultaneously running autovacuum worker processes.
autovacuum_naptime | 1min | Time to sleep between autovacuum runs.
autovacuum_vacuum_cost_delay | 20ms | Vacuum cost delay in milliseconds, for autovacuum.
autovacuum_vacuum_cost_limit | -1 | Vacuum cost amount available before napping, for autovacuum.
autovacuum_vacuum_scale_factor | 0.2 | Number of tuple updates or deletes prior to vacuum as a fraction of reltuples.
autovacuum_vacuum_threshold | 50 | Minimum number of tuple updates or deletes prior to vacuum.
backslash_quote | safe_encoding | Sets whether "\'" is allowed in string literals.
bgwriter_delay | 200ms | Background writer sleep time between rounds.
bgwriter_lru_maxpages | 100 | Background writer maximum number of LRU pages to flush per round.
bgwriter_lru_multiplier | 2 | Background writer multiplier on average buffers to scan per round.
block_size | 8192 | Shows the size of a disk block.
bonjour_name | | Sets the Bonjour broadcast service name.
check_function_bodies | on | Check function bodies during CREATE FUNCTION.
checkpoint_completion_target | 0.5 | Time spent flushing dirty buffers during checkpoint, as fraction of checkpoint interval.
checkpoint_segments | 3 | Sets the maximum distance in log segments between automatic WAL checkpoints.
checkpoint_timeout | 5min | Sets the maximum time between automatic WAL checkpoints.
checkpoint_warning | 30s | Enables warnings if checkpoint segments are filled more frequently than this.
client_encoding | SQL_ASCII | Sets the client's character set encoding.
client_min_messages | error | Sets the message levels that are sent to the client.
commit_delay | 0 | Sets the delay in microseconds between transaction commit and flushing WAL to disk.
commit_siblings | 5 | Sets the minimum concurrent open transactions before performing commit_delay.
config_file | /var/lib/data/postgresql.conf | Sets the server's main configuration file.
constraint_exclusion | off | Enables the planner to use constraints to optimize queries.
cpu_index_tuple_cost | 0.005 | Sets the planner's estimate of the cost of processing each index entry during an index scan.
cpu_operator_cost | 0.0025 | Sets the planner's estimate of the cost of processing each operator or function call.
cpu_tuple_cost | 0.01 | Sets the planner's estimate of the cost of processing each tuple (row).
custom_variable_classes | | Sets the list of known custom variable classes.
data_directory | /var/lib/data | Sets the server's data directory.
DateStyle | ISO, MDY | Sets the display format for date and time values.
db_user_namespace | off | Enables per-database user names.
deadlock_timeout | 1s | Sets the time to wait on a lock before checking for deadlock.
debug_assertions | off | Turns on various assertion checks.
debug_pretty_print | off | Indents parse and plan tree displays.
debug_print_parse | off | Prints the parse tree to the server log.
debug_print_plan | off | Prints the execution plan to server log.
debug_print_rewritten | off | Prints the parse tree after rewriting to server log.
default_statistics_target | 10 | Sets the default statistics target.
default_tablespace | | Sets the default tablespace to create tables and indexes in.
default_text_search_config | pg_catalog.english | Sets default text search configuration.
default_transaction_isolation | read committed | Sets the transaction isolation level of each new transaction.
default_transaction_read_only | off | Sets the default read-only status of new transactions.
default_with_oids | off | Create new tables with OIDs by default.
dynamic_library_path | $libdir | Sets the path for dynamically loadable modules.
effective_cache_size | 128MB | Sets the planner's assumption about the size of the disk cache.
enable_bitmapscan | on | Enables the planner's use of bitmap-scan plans.
enable_hashagg | on | Enables the planner's use of hashed aggregation plans.
enable_hashjoin | on | Enables the planner's use of hash join plans.
enable_indexscan | on | Enables the planner's use of index-scan plans.
enable_mergejoin | on | Enables the planner's use of merge join plans.
enable_nestloop | on | Enables the planner's use of nested-loop join plans.
enable_seqscan | on | Enables the planner's use of sequential-scan plans.
enable_sort | on | Enables the planner's use of explicit sort steps.
enable_tidscan | on | Enables the planner's use of TID scan plans.
escape_string_warning | on | Warn about backslash escapes in ordinary string literals.
explain_pretty_print | on | Uses the indented output format for EXPLAIN VERBOSE.
external_pid_file | | Writes the postmaster PID to the specified file.
extra_float_digits | 0 | Sets the number of digits displayed for floating-point values.
from_collapse_limit | 8 | Sets the FROM-list size beyond which subqueries are not collapsed.
fsync | on | Forces synchronization of updates to disk.
full_page_writes | on | Writes full pages to WAL when first modified after a checkpoint.
geqo | on | Enables genetic query optimization.
geqo_effort | 5 | GEQO: effort is used to set the default for other GEQO parameters.
geqo_generations | 0 | GEQO: number of iterations of the algorithm.
geqo_pool_size | 0 | GEQO: number of individuals in the population.
geqo_selection_bias | 2 | GEQO: selective pressure within the population.
geqo_threshold | 12 | Sets the threshold of FROM items beyond which GEQO is used.
gin_fuzzy_search_limit | 0 | Sets the maximum allowed result for exact search by GIN.
hba_file | /var/lib/data/pg_hba.conf | Sets the server's "hba" configuration file.
ident_file | /var/lib/data/pg_ident.conf | Sets the server's "ident" configuration file.
ignore_system_indexes | off | Disables reading from system indexes.
integer_datetimes | off | Datetimes are integer based.
join_collapse_limit | 8 | Sets the FROM-list size beyond which JOIN constructs are not flattened.
krb_caseins_users | off | Sets whether Kerberos and GSSAPI user names should be treated as case-insensitive.
krb_realm | | Sets realm to match Kerberos and GSSAPI users against.
krb_server_hostname | | Sets the hostname of the Kerberos server.
krb_server_keyfile | | Sets the location of the Kerberos server key file.
krb_srvname | postgres | Sets the name of the Kerberos service.
lc_collate | C | Shows the collation order locale.
lc_ctype | C | Shows the character classification and case conversion locale.
lc_messages | C | Sets the language in which messages are displayed.
lc_monetary | C | Sets the locale for formatting monetary amounts.
lc_numeric | C | Sets the locale for formatting numbers.
lc_time | C | Sets the locale for formatting date and time values.
listen_addresses | * | Sets the host name or IP address(es) to listen to.
local_preload_libraries | | Lists shared libraries to preload into each backend.
log_autovacuum_min_duration | -1 | Sets the minimum execution time above which autovacuum actions will be logged.
log_checkpoints | off | Logs each checkpoint.
log_connections | off | Logs each successful connection.
log_destination | stderr | Sets the destination for server log output.
log_directory | pg_log | Sets the destination directory for log files.
log_disconnections | off | Logs end of a session, including duration.
log_duration | off | Logs the duration of each completed SQL statement.
log_error_verbosity | default | Sets the verbosity of logged messages.
log_executor_stats | off | Writes executor performance statistics to the server log.
log_filename | postgresql-%Y-%m-%d_%H%M%S.log | Sets the file name pattern for log files.
log_hostname | off | Logs the host name in the connection logs.
log_line_prefix | %t | Controls information prefixed to each log line.
log_lock_waits | off | Logs long lock waits.
log_min_duration_statement | -1 | Sets the minimum execution time above which statements will be logged.
log_min_error_statement | error | Causes all statements generating error at or above this level to be logged.
log_min_messages | info | Sets the message levels that are logged.
log_parser_stats | off | Writes parser performance statistics to the server log.
log_planner_stats | off | Writes planner performance statistics to the server log.
log_rotation_age | 1d | Automatic log file rotation will occur after N minutes.
log_rotation_size | 10MB | Automatic log file rotation will occur after N kilobytes.
log_statement | none | Sets the type of statements logged.
log_statement_stats | off | Writes cumulative performance statistics to the server log.
log_temp_files | -1 | Log the use of temporary files larger than this number of kilobytes.
log_timezone | PST8PDT | Sets the time zone to use in log messages.
log_truncate_on_rotation | off | Truncate existing log files of same name during log rotation.
logging_collector | off | Start a subprocess to capture stderr output and/or csvlogs into log files.
maintenance_work_mem | 16MB | Sets the maximum memory to be used for maintenance operations.
max_connections | 250 | Sets the maximum number of concurrent connections.
max_files_per_process | 1000 | Sets the maximum number of simultaneously open files for each server process.
max_fsm_pages | 153600 | Sets the maximum number of disk pages for which free space is tracked.
max_fsm_relations | 1000 | Sets the maximum number of tables and indexes for which free space is tracked.
max_function_args | 100 | Shows the maximum number of function arguments.
max_identifier_length | 63 | Shows the maximum identifier length.
max_index_keys | 32 | Shows the maximum number of index keys.
max_locks_per_transaction | 64 | Sets the maximum number of locks per transaction.
max_prepared_transactions | 5 | Sets the maximum number of simultaneously prepared transactions.
max_stack_depth | 2MB | Sets the maximum stack depth, in kilobytes.
password_encryption | on | Encrypt passwords.
port | 5432 | Sets the TCP port the server listens on.
post_auth_delay | 0 | Waits N seconds on connection startup after authentication.
pre_auth_delay | 0 | Waits N seconds on connection startup before authentication.
random_page_cost | 4 | Sets the planner's estimate of the cost of a nonsequentially fetched disk page.
regex_flavor | advanced | Sets the regular expression "flavor".
search_path | "$user",public | Sets the schema search order for names that are not schema-qualified.
seq_page_cost | 1 | Sets the planner's estimate of the cost of a sequentially fetched disk page.
server_encoding | SQL_ASCII | Sets the server (database) character set encoding.
server_version | 8.3.5 | Shows the server version.
server_version_num | 80305 | Shows the server version as an integer.
session_replication_role | origin | Sets the session's behavior for triggers and rewrite rules.
shared_buffers | 24MB | Sets the number of shared memory buffers used by the server.
shared_preload_libraries | | Lists shared libraries to preload into server.
silent_mode | off | Runs the server silently.
sql_inheritance | on | Causes subtables to be included by default in various commands.
ssl | off | Enables SSL connections.
standard_conforming_strings | off | Causes '...' strings to treat backslashes literally.
statement_timeout | 0 | Sets the maximum allowed duration of any statement.
superuser_reserved_connections | 3 | Sets the number of connection slots reserved for superusers.
synchronize_seqscans | on | Enable synchronized sequential scans.
synchronous_commit | on | Sets immediate fsync at commit.
syslog_facility | LOCAL0 | Sets the syslog "facility" to be used when syslog enabled.
syslog_ident | postgres | Sets the program name used to identify PostgreSQL messages in syslog.
tcp_keepalives_count | 0 | Maximum number of TCP keepalive retransmits.
tcp_keepalives_idle | 0 | Time between issuing TCP keepalives.
tcp_keepalives_interval | 0 | Time between TCP keepalive retransmits.
temp_buffers | 1024 | Sets the maximum number of temporary buffers used by each session.
temp_tablespaces | | Sets the tablespace(s) to use for temporary tables and sort files.
TimeZone | PST8PDT | Sets the time zone for displaying and interpreting time stamps.
timezone_abbreviations | Default | Selects a file of time zone abbreviations.
trace_notify | off | Generates debugging output for LISTEN and NOTIFY.
trace_sort | off | Emit information about resource usage in sorting.
track_activities | on | Collects information about executing commands.
track_counts | on | Collects statistics on database activity.
transaction_isolation | read committed | Sets the current transaction's isolation level.
transaction_read_only | off | Sets the current transaction's read-only status.
transform_null_equals | off | Treats "expr=NULL" as "expr IS NULL".
unix_socket_directory | | Sets the directory where the Unix-domain socket will be created.
unix_socket_group | | Sets the owning group of the Unix-domain socket.
unix_socket_permissions | 511 | Sets the access permissions of the Unix-domain socket.
update_process_title | on | Updates the process title to show the active SQL command.
vacuum_cost_delay | 0 | Vacuum cost delay in milliseconds.
vacuum_cost_limit | 200 | Vacuum cost amount available before napping.
vacuum_cost_page_dirty | 20 | Vacuum cost for a page dirtied by vacuum.
vacuum_cost_page_hit | 1 | Vacuum cost for a page found in the buffer cache.
vacuum_cost_page_miss | 10 | Vacuum cost for a page not found in the buffer cache.
vacuum_freeze_min_age | 100000000 | Minimum age at which VACUUM should freeze a table row.
wal_buffers | 64kB | Sets the number of disk-page buffers in shared memory for WAL.
wal_sync_method | fdatasync | Selects the method used for forcing WAL updates to disk.
wal_writer_delay | 200ms | WAL writer sleep time between WAL flushes.
work_mem | 1MB | Sets the maximum memory to be used for query workspaces.
xmlbinary | base64 | Sets how binary values are to be encoded in XML.
xmloption | content | Sets whether XML data in implicit parsing and serialization operations is to be considered as documents or content fragments.
zero_damaged_pages | off | Continues processing past damaged page headers.
(188 rows)