+ linkend="monitoring-stats-funcs-table">. The per-database access
+ functions take a database OID as argument to identify which
+ database to report on. The per-table and per-index functions take
+ a table or index OID. The functions for function-call statistics
+ take a function OID. (Note that only tables, indexes, and functions
+ in the current database can be seen with these functions.) The
+ per-server-process access functions take a server process
+ number, which ranges from one to the number of currently active
+ server processes.
+
+
+
pg_stat_activity view
|
datid
oid
- The oid of the database the backend is connected to.
+ The oid of the database the backend is connected to.
+ This value can also be returned by directly calling
+ the pg_stat_get_backend_dbid .
|
datname
|
pid
integer
- The process ID of the backend.
+ The process ID of the backend.
+ This value can also be returned by directly calling
+ the pg_stat_get_backend_pid .
|
usesysid
oid
- The id of the user logged into the backend.
+ The id of the user logged into the backend.
+ This value can also be returned by directly calling
+ the pg_stat_get_backend_userid .
|
usename
If this field is not set, it indicates that the client is either connected
via a Unix socket on the server machine or is an internal process such
as autovacuum.
+ This value can also be returned by directly calling
+ the pg_stat_get_backend_client_addr .
|
The remote TCP port that the client is using for communication
to the backend, or NULL if a unix socket is used.
+ This value can also be returned by directly calling
+ the pg_stat_get_backend_client_port .
|
The time when this process was started, i.e. when the
client connected to the server.
+ This value can also be returned by directly calling
+ the pg_stat_get_backend_start .
|
The time when the current transaction was started. If the client is
using autocommit for transactions, this value is equal to the
query_start column.
+ This value can also be returned by directly calling
+ the pg_stat_get_backend_xact_start .
|
The time when the currently active query started, or if
state is idle, when the last query
was started.
+ This value can also be returned by directly calling
+ the pg_stat_get_backend_activity_start .
|
boolean
Boolean indicating if a backend is currently waiting on a lock.
+ This value can also be returned by directly calling
+ the pg_stat_get_backend_waiting .
|
per server process, showing information related to each connection to
the server.
+ All functions used in the view are indexed by backend id number. The
+ function pg_stat_get_backend_idset provides a
+ convenient way to generate one row for each active server process. For
+ example, to show the
PIDs and current queries of all server processes: +
+SELECT pg_stat_get_backend_pid(s.backendid) AS pid,
+ pg_stat_get_backend_activity(s.backendid) AS query
+ FROM (SELECT pg_stat_get_backend_idset() AS backendid) AS s;
+
+
pg_stat_bgwriter view
|
checkpoints_timed
bigint
- Number of scheduled checkpoints
+ Number of scheduled checkpoints.
+ This value can also be returned by directly calling
+ the pg_stat_get_bgwriter_timed_checkpoints function.
|
checkpoints_requested
bigint
- Number of requested checkpoints
+ Number of requested checkpoints.
+ This value can also be returned by directly calling
+ the pg_stat_get_bgwriter_requested_checkpoints function.
|
buffers_checkpoint
bigint
- Number of buffers written during checkpoints
+ Number of buffers written during checkpoints.
+ This value can also be returned by directly calling
+ the pg_stat_get_bgwriter_buf_written_checkpoints function.
|
buffers_clean
bigint
- Number of buffers written by the background writer
+ Number of buffers written by the background writer.
+ This value can also be returned by directly calling
+ the pg_stat_get_bgwriter_buf_written_clean function.
|
maxwritten_clean
bigint
Number of times the background writer stopped a cleaning
- scan because it had written too many buffers
+ scan because it had written too many buffers.
+ This value can also be returned by directly calling
+ the pg_stat_get_bgwriter_maxwritten_clean function.
|
buffers_backend
bigint
- Number of buffers written directly by a backend
+ Number of buffers written directly by a backend.
+ This value can also be returned by directly calling
+ the pg_stat_get_buf_written_backend function.
|
buffers_backend_fsync
|
buffers_alloc
bigint
- Number of buffers allocated
+ Number of buffers allocated.
+ This value can also be returned by directly calling
+ the pg_stat_get_buf_alloc function.
|
stats_reset
bigint
- The last time these statistics were reset
+ The last time these statistics were reset.
+ This value can also be returned by directly calling
+ the pg_stat_get_bgwriter_stat_reset_time function.
The number of backends currently connected to this database.
This is the only column in this view that returns a value for the
current state, all other columns return the accumulated values since
- the last reset.
+ the last reset. This value can also be returned by directly calling
+ the pg_stat_get_db_numbackends function.
|
xact_commit
bigint
- The number of transactions in this database that has committed
+ The number of transactions in this database that has committed.
+ This value can also be returned by directly calling
+ the pg_stat_get_db_xact_commit function.
|
xact_rollback
bigint
- The number of transactions in this database that has rolled back
+ The number of transactions in this database that has rolled back.
+ This value can also be returned by directly calling
+ the pg_stat_get_db_xact_rollback function.
|
blks_read
bigint
- The number of disk blocks read in this database
+ The number of disk blocks read in this database.
+ This value can also be returned by directly calling
+ the pg_stat_get_db_blocks_fetched and
+ pg_stat_get_db_blocks_hit functions and
+ subtracting the results.
|
blks_hits
bigint
The number of disk blocks read from the buffer cache
(this only includes hits in the PostgreSQL buffer cache, and not
- the operating system filesystem cache)
+ the operating system filesystem cache).
+ This value can also be returned by directly calling
+ the pg_stat_get_db_blocks_hit function.
|
tup_returned
bigint
- The number of rows returned by queries in this database
+ The number of rows returned by queries in this database.
+ This value can also be returned by directly calling
+ the pg_stat_get_db_tuples_returned function.
|
tup_fetched
bigint
- The number of rows fetched by queries in this database
+ The number of rows fetched by queries in this database.
+ This value can also be returned by directly calling
+ the pg_stat_get_db_tuples_fetched function.
|
tup_inserted
bigint
- The number of rows inserted by queries in this database
+ The number of rows inserted by queries in this database.
+ This value can also be returned by directly calling
+ the pg_stat_get_db_tuples_inserted function.
|
tup_updated
bigint
- The number of rows updated by queries in this database
+ The number of rows updated by queries in this database.
+ This value can also be returned by directly calling
+ the pg_stat_get_db_tuples_updated function.
|
tup_deleted
bigint
- The number of rows deleted by queries in this database
+ The number of rows deleted by queries in this database.
+ This value can also be returned by directly calling
+ the pg_stat_get_db_tuples_deleted function.
|
conflicts
The number of queries canceled due to conflict with recovery
(on standby servers) in this database. (See
- for more details)
+ for more details).
+ This value can also be returned by directly calling
+ the pg_stat_get_db_conflict_all function.
|
All temporary files are counted, regardless of why the temporary file
was created (sorting or hash) or file size, and regardless of the
setting.
+ This value can also be returned by directly calling
+ the pg_stat_get_db_temp_files function.
|
the database. All temporary files are counted, regardless of why
the temporary file was created (sorting or hash) or file size, and
regardless of the setting.
+ This value can also be returned by directly calling
+ the pg_stat_get_db_temp_bytes function.
|
deadlocks
bigint
- Number of deadlocks detected in the database
+ Number of deadlocks detected in the database.
+ This value can also be returned by directly calling
+ the pg_stat_get_db_deadlocks function.
|
stats_reset
timestamptz
- The last time the statistics were reset
+ The last time the statistics were reset.
+ This value can also be returned by directly calling
+ the pg_stat_get_reset_time function.
confl_tablespace
bigint
The number of queries that have been canceled due to
- dropped tablespaces
+ dropped tablespaces. This value can also be returned by directly calling
+ the pg_stat_get_db_conflict_tablespace function.
|
confl_lock
bigint
The number of queries that have been canceled due to
- lock timeouts
+ lock timeouts. This value can also be returned by directly calling
+ the pg_stat_get_db_conflict_lock function.
|
confl_snapshot
bigint
The number of queries that have been canceled due to
- old snapshots
+ old snapshots. This value can also be returned by directly calling
+ the pg_stat_get_db_conflict_snapshot function.
|
confl_bufferpin
bigint
The number of queries that have been canceled due to
- pinned buffers
+ pinned buffers. This value can also be returned by directly calling
+ the pg_stat_get_db_conflict_bufferpin function.
|
confl_deadlock
bigint
The number of queries that have been canceled due to
- deadlocks
+ deadlocks. This value can also be returned by directly calling
+ the pg_stat_get_db_conflict_startup_deadlock
+ function.
|
seq_scan
bigint
- The number of sequential scans initiated on this table
+ The number of sequential scans initiated on this table.
+ This value can also be returned by directly calling
+ the pg_stat_get_numscans function.
|
seq_tup_read
bigint
- The number of live rows fetch by sequential scans
+ The number of live rows fetch by sequential scans.
+ This value can also be returned by directly calling
+ the pg_stat_get_tuples_returned function.
|
idx_scan
|
idx_tup_fetch
bigint
- The number of live rows fetch by index scans
+ The number of live rows fetch by index scans.
|
n_tup_ins
bigint
- The number of rows inserted
+ The number of rows inserted.
+ This value can also be returned by directly calling
+ the pg_stat_get_tuples_inserted function.
|
n_tup_upd
bigint
- The number of rows updated
+ The number of rows updated.
+ This value can also be returned by directly calling
+ the pg_stat_get_tuples_updated function.
|
n_tup_del
bigint
- The number of rows deleted
+ The number of rows deleted.
+ This value can also be returned by directly calling
+ the pg_stat_get_tuples_deleted function.
|
n_tup_hot_upd
bigint
- The number of rows HOT (i.e., no separate index update) updated
+ The number of rows HOT (i.e., no separate index update) updated.
+ This value can also be returned by directly calling
+ the pg_stat_get_tuples_hot_updated function.
|
n_live_tup
bigint
- The number of live rows
+ The number of live rows.
+ This value can also be returned by directly calling
+ the pg_stat_get_live_tuples function.
|
n_dead_tup
bigint
- The number of dead rows
+ The number of dead rows.
+ This value can also be returned by directly calling
+ the pg_stat_get_dead_tuples function.
|
last_vacuum
timestamp with time zone
- The last time the table was manually non-FULL vacuumed
+ The last time the table was manually non-FULL vacuumed.
+ This value can also be returned by directly calling
+ the pg_stat_get_last_vacuum_time function.
|
last_autovacuum
timestamp with time zone
- The last time the table was vacuumed by the autovacuum daemon
+ The last time the table was vacuumed by the autovacuum daemon.
+ This value can also be returned by directly calling
+ the pg_stat_get_last_autovacuum_time function.
|
last_analyze
timestamp with time zone
- The last time the table was manually analyzed
+ The last time the table was manually analyzed.
+ This value can also be returned by directly calling
+ the pg_stat_get_last_analyze_time function.
|
last_autoanalyze
timestamp with time zone
- The last time the table was analyzed by the autovacuum daemon
+ The last time the table was analyzed by the autovacuum daemon.
+ This value can also be returned by directly calling
+ the pg_stat_get_last_autoanalyze_time function.
|
vacuum_count
bigint
- The number of times this table has been manually non-FULL vacuumed
+ The number of times this table has been manually non-FULL vacuumed.
+ This value can also be returned by directly calling
+ the pg_stat_get_vacuum_count function.
|
autovacuum_count
bigint
- The number of times this table has been vacuumed by the autovacuum daemon
+ The number of times this table has been vacuumed by the autovacuum daemon.
+ This value can also be returned by directly calling
+ the pg_stat_get_autovacuum_count function.
|
analyze_count
bigint
- The number of times this table has been manually analyzed
+ The number of times this table has been manually analyzed.
+ This value can also be returned by directly calling
+ the pg_stat_get_analyze_count function.
|
autoanalyze_count
bigint
- The number of times this table has been analyzed by the autovacuum daemon
+ The number of times this table has been analyzed by the autovacuum daemon.
+ This value can also be returned by directly calling
+ the pg_stat_get_autoanalyze_count function.
|
idx_scan
bigint
- Number of index scans initiated on this index
+ Number of index scans initiated on this index.
+ This value can also be returned by directly calling
+ the pg_stat_get_numscans function.
|
idx_tup_read
bigint
- Number of index entries returned by scans on this index
+ Number of index entries returned by scans on this index.
+ This value can also be returned by directly calling
+ the pg_stat_get_tuples_returned function.
|
idx_tup_fetch
bigint
- Number of live table rows fetched by simple index scans using this index
+ Number of live table rows fetched by simple index scans using this index.
+ This value can also be returned by directly calling
+ the pg_stat_get_tuples_fetched function.
|
heap_blks_read
name
- Number of disk blocks read from this table
+ Number of disk blocks read from this table.
+ This value can also be returned by directly calling
+ the pg_stat_get_blocks_fetched and
+ pg_stat_get_blocks_hit functions and
+ subtracting the results.
|
heap_blks_hit
name
- Number of buffer hits in this table
+ Number of buffer hits in this table.
+ This value can also be returned by directly calling
+ the pg_stat_get_blocks_hit function.
|
idx_blks_read
|
idx_blks_hit
name
- Number of buffer hits in all indexes of this table
+ Number of buffer hits in all indexes of this table.
|
toast_blks_read
|
idx_blks_read
name
- Number of disk blocks read from the index
+ Number of disk blocks read from the index.
+ This value can also be returned by directly calling
+ the pg_stat_get_blocks_fetched and
+ pg_stat_get_blocks_hit functions and
+ subtracting the results.
|
idx_blks_hit
name
- Number of buffer hits in the index
+ Number of buffer hits in the index.
+ This value can also be returned by directly calling
+ the pg_stat_get_blocks_hit function.
|
calls
bigint
- Number of times the function has been called
+ Number of times the function has been called.
+ This value can also be returned by directly calling
+ the pg_stat_get_function_calls function.
|
total_time
bigint
Total time spent in this functions and all other functions
- called by it, in milliseconds.
+ called by it, in milliseconds.
+ This value can also be returned by directly calling
+ the pg_stat_get_function_time function.
|
self_time
bigint
Total time spent in this functions itself but not including
- other functions called by it, in milliseconds.
+ other functions called by it, in milliseconds.
+ This value can also be returned by directly calling
+ the pg_stat_get_function_self_time function.
-
<span class="marked">Statistics Acces</span>s Functions
+
<span class="marked">Other Statistic</span>s Functions
- Other ways of looking at the statistics can be set up by writing
- queries that use the same underlying statistics access functions as
- these standard views do. These functions are listed in
- linkend="monitoring-stats-funcs-table">. The per-database access
- functions take a database OID as argument to identify which
- database to report on. The per-table and per-index functions take
- a table or index OID. The functions for function-call statistics
- take a function OID. (Note that only tables, indexes, and functions
- in the current database can be seen with these functions.) The
- per-server-process access functions take a server process
- number, which ranges from one to the number of currently active
- server processes.
-
-
<span class="marked">Statistics Acces</span>s Functions
+
<span class="marked">Other Statistic</span>s Functions
- |
- pg_stat_get_db_numbackends (oid )
- integer
-
- Number of active server processes for database
-
-
-
- |
- pg_stat_get_db_xact_commit (oid )
- bigint
-
- Number of transactions committed in database
-
-
-
- |
- pg_stat_get_db_xact_rollback (oid )
- bigint
-
- Number of transactions rolled back in database
-
-
-
- |
- pg_stat_get_db_blocks_fetched (oid )
- bigint
-
- Number of disk block fetch requests for database
-
-
-
- |
- pg_stat_get_db_blocks_hit (oid )
- bigint
-
- Number of disk block fetch requests found in cache for database
-
-
-
- |
- pg_stat_get_db_tuples_returned (oid )
- bigint
-
- Number of tuples returned for database
-
-
-
- |
- pg_stat_get_db_tuples_fetched (oid )
- bigint
-
- Number of tuples fetched for database
-
-
-
- |
- pg_stat_get_db_tuples_inserted (oid )
- bigint
-
- Number of tuples inserted in database
-
-
-
- |
- pg_stat_get_db_tuples_updated (oid )
- bigint
-
- Number of tuples updated in database
-
-
-
- |
- pg_stat_get_db_tuples_deleted (oid )
- bigint
-
- Number of tuples deleted in database
-
-
-
- |
- pg_stat_get_db_conflict_tablespace (oid )
- bigint
-
- Number of queries canceled because of recovery conflict with dropped tablespaces in database
-
-
-
- |
- pg_stat_get_db_conflict_lock (oid )
- bigint
-
- Number of queries canceled because of recovery conflict with locks in database
-
-
-
- |
- pg_stat_get_db_conflict_snapshot (oid )
- bigint
-
- Number of queries canceled because of recovery conflict with old snapshots in database
-
-
-
- |
- pg_stat_get_db_conflict_bufferpin (oid )
- bigint
-
- Number of queries canceled because of recovery conflict with pinned buffers in database
-
-
-
- |
- pg_stat_get_db_conflict_startup_deadlock (oid )
- bigint
-
- Number of queries canceled because of recovery conflict with deadlocks in database
-
-
-
- |
- pg_stat_get_db_stat_reset_time (oid )
- timestamptz
-
- Time of the last statistics reset for the database. Initialized to the
- system time during the first connection to each database. The reset time
- is updated when you call pg_stat_reset on the
- database, as well as upon execution of
- pg_stat_reset_single_table_counters against any
- table or index in it.
-
-
-
- |
- pg_stat_get_db_temp_bytes (oid )
- bigint
-
- Amount of data written to temporary files by queries in the database.
- All temporary files are counted, regardless of why the temporary file
- was created (sorting or hash), and regardless of the
- setting.
-
-
-
- |
- pg_stat_get_db_temp_files (oid )
- bigint
-
- Number of temporary files written by queries in the database. All temporary
- files are counted, regardless of why the temporary file was created
- (sorting or hash) or file size, and regardless of the
- setting.
-
-
-
- |
- pg_stat_get_db_deadlocks (oid )
- bigint
-
- Number of deadlocks detected in the database
-
-
-
- |
- pg_stat_get_numscans (oid )
- bigint
-
- Number of sequential scans done when argument is a table,
- or number of index scans done when argument is an index
-
-
-
- |
- pg_stat_get_tuples_returned (oid )
- bigint
-
- Number of rows read by sequential scans when argument is a table,
- or number of index entries returned when argument is an index
-
-
-
- |
- pg_stat_get_tuples_fetched (oid )
- bigint
-
- Number of table rows fetched by bitmap scans when argument is a table,
- or table rows fetched by simple index scans using the index
- when argument is an index
-
-
-
- |
- pg_stat_get_tuples_inserted (oid )
- bigint
-
- Number of rows inserted into table
-
-
-
- |
- pg_stat_get_tuples_updated (oid )
- bigint
-
- Number of rows updated in table (includes HOT updates)
-
-
-
- |
- pg_stat_get_tuples_deleted (oid )
- bigint
-
- Number of rows deleted from table
-
-
-
- |
- pg_stat_get_tuples_hot_updated (oid )
- bigint
-
- Number of rows HOT-updated in table
-
-
-
- |
- pg_stat_get_live_tuples (oid )
- bigint
-
- Number of live rows in table
-
-
-
- |
- pg_stat_get_dead_tuples (oid )
- bigint
-
- Number of dead rows in table
-
-
-
- |
- pg_stat_get_blocks_fetched (oid )
- bigint
-
- Number of disk block fetch requests for table or index
-
-
-
- |
- pg_stat_get_blocks_hit (oid )
- bigint
-
- Number of disk block requests found in cache for table or index
-
-
-
- |
- pg_stat_get_last_vacuum_time (oid )
- timestamptz
-
- Time of the last non-FULL vacuum initiated by the user on this table
-
-
-
- |
- pg_stat_get_last_autovacuum_time (oid )
- timestamptz
-
- Time of the last vacuum initiated by the autovacuum daemon on this table
-
-
-
- |
- pg_stat_get_last_analyze_time (oid )
- timestamptz
-
- Time of the last analyze initiated by the user on this table
-
-
-
- |
- pg_stat_get_last_autoanalyze_time (oid )
- timestamptz
-
- Time of the last analyze initiated by the autovacuum daemon on this
- table
-
-
-
- |
- pg_stat_get_vacuum_count (oid )
- bigint
-
- The number of times this table has been non-FULL vacuumed manually
-
-
-
- |
- pg_stat_get_autovacuum_count (oid )
- bigint
-
- The number of times this table has been vacuumed by the autovacuum daemon
-
-
-
- |
- pg_stat_get_analyze_count (oid )
- bigint
-
- The number of times this table has been analyzed manually
-
-
-
- |
- pg_stat_get_autoanalyze_count (oid )
- bigint
-
- The number of times this table has been analyzed by the autovacuum daemon
-
-
-
- |
- pg_stat_get_xact_numscans (oid )
- bigint
-
- Number of sequential scans done when argument is a table,
- or number of index scans done when argument is an index, in the current transaction
-
-
-
- |
- pg_stat_get_xact_tuples_returned (oid )
- bigint
-
- Number of rows read by sequential scans when argument is a table,
- or number of index entries returned when argument is an index, in the current transaction
-
-
-
- |
- pg_stat_get_xact_tuples_fetched (oid )
- bigint
-
- Number of table rows fetched by bitmap scans when argument is a table,
- or table rows fetched by simple index scans using the index
- when argument is an index, in the current transaction
-
-
-
- |
- pg_stat_get_xact_tuples_inserted (oid )
- bigint
-
- Number of rows inserted into table, in the current transaction
-
-
-
- |
- pg_stat_get_xact_tuples_updated (oid )
- bigint
-
- Number of rows updated in table (includes HOT updates), in the current transaction
-
-
-
- |
- pg_stat_get_xact_tuples_deleted (oid )
- bigint
-
- Number of rows deleted from table, in the current transaction
-
-
-
- |
- pg_stat_get_xact_tuples_hot_updated (oid )
- bigint
-
- Number of rows HOT-updated in table, in the current transaction
-
-
-
- |
- pg_stat_get_xact_blocks_fetched (oid )
- bigint
-
- Number of disk block fetch requests for table or index, in the current transaction
-
-
-
- |
- pg_stat_get_xact_blocks_hit (oid )
- bigint
-
- Number of disk block requests found in cache for table or index, in the current transaction
-
-
|
- |
- pg_stat_get_function_calls (oid )
- bigint
-
- Number of times the function has been called
-
-
-
- |
- pg_stat_get_function_time (oid )
- bigint
-
- Total wall clock time spent in the function, in microseconds. Includes
- the time spent in functions called by this one.
-
-
-
- |
- pg_stat_get_function_self_time (oid )
- bigint
-
- Time spent in only this function. Time spent in called functions
- is excluded.
-
-
-
- |
- pg_stat_get_xact_function_calls (oid )
- bigint
-
- Number of times the function has been called, in the current transaction.
-
-
-
- |
- pg_stat_get_xact_function_time (oid )
- bigint
-
- Total wall clock time spent in the function, in microseconds, in the
- current transaction. Includes the time spent in functions called by
- this one.
-
-
-
- |
- pg_stat_get_xact_function_self_time (oid )
- bigint
-
- Time spent in only this function, in the current transaction. Time
- spent in called functions is excluded.
-
-
-
|
pg_stat_get_backend_idset()
setof integer
- |
- pg_stat_get_backend_pid (integer )
- integer
-
- Process ID of the given server process
-
-
-
- |
- pg_stat_get_backend_dbid (integer )
- oid
-
- Database ID of the given server process
-
-
-
- |
- pg_stat_get_backend_userid (integer )
- oid
-
- User ID of the given server process
-
-
-
- |
- pg_stat_get_backend_activity (integer )
- text
-
- Active command of the given server process, but only if the
- current user is a superuser or the same user as that of
- the session being queried (and
- track_activities is on)
-
-
-
- |
- pg_stat_get_backend_waiting (integer )
- boolean
-
- True if the given server process is waiting for a lock,
- but only if the current user is a superuser or the same user as that of
- the session being queried (and
- track_activities is on)
-
-
-
- |
- pg_stat_get_backend_activity_start (integer )
- timestamp with time zone
-
- The time at which the given server process' currently
- executing query was started, but only if the
- current user is a superuser or the same user as that of
- the session being queried (and
- track_activities is on)
-
-
-
- |
- pg_stat_get_backend_xact_start (integer )
- timestamp with time zone
-
- The time at which the given server process' currently
- executing transaction was started, but only if the
- current user is a superuser or the same user as that of
- the session being queried (and
- track_activities is on)
-
-
-
- |
- pg_stat_get_backend_start (integer )
- timestamp with time zone
-
- The time at which the given server process was started, or
- null if the current user is not a superuser nor the same user
- as that of the session being queried
-
-
-
- |
- pg_stat_get_backend_client_addr (integer )
- inet
-
- The IP address of the client connected to the given
- server process; null if the connection is over a Unix domain
- socket, also null if the current user is not a superuser nor
- the same user as that of the session being queried
-
-
-
- |
- pg_stat_get_backend_client_port (integer )
- integer
-
- The TCP port number of the client connected to the given
- server process; -1 if the connection is over a Unix domain
- socket, null if the current user is not a superuser nor the
- same user as that of the session being queried
-
-
-
- |
- pg_stat_get_bgwriter_timed_checkpoints()
- bigint
-
- Number of times the background writer has started timed checkpoints
- (because the checkpoint_timeout time has expired)
-
-
-
- |
- pg_stat_get_bgwriter_requested_checkpoints()
- bigint
-
- Number of times the background writer has started checkpoints based
- on requests from backends because the checkpoint_segments
- has been exceeded or because the CHECKPOINT
- command has been issued
-
-
-
- |
- pg_stat_get_bgwriter_buf_written_checkpoints()
- bigint
-
- Number of buffers written by the background writer during checkpoints
-
-
-
- |
- pg_stat_get_bgwriter_buf_written_clean()
- bigint
-
- Number of buffers written by the background writer for routine cleaning of
- dirty pages
-
-
-
- |
- pg_stat_get_bgwriter_maxwritten_clean()
- bigint
-
- Number of times the background writer has stopped its cleaning scan because
- it has written more buffers than specified in the
- bgwriter_lru_maxpages parameter
-
-
-
- |
- pg_stat_get_bgwriter_stat_reset_time()
- timestamptz
-
- Time of the last statistics reset for the background writer, updated
- when executing pg_stat_reset_shared('bgwriter')
- on the database cluster.
-
-
-
- |
- pg_stat_get_buf_written_backend()
- bigint
-
- Number of buffers written by backends because they needed
- to allocate a new buffer
-
-
-
- |
- pg_stat_get_buf_alloc()
- bigint
-
- Total number of buffer allocations
-
-
|
pg_stat_get_wal_senders()
-
- pg_stat_get_blocks_fetched minus
- pg_stat_get_blocks_hit gives the number of kernel
- read() calls issued for the table, index, or
- database; the number of actual physical reads is usually
- lower due to kernel-level buffering. The *_blks_read
- statistics columns use this subtraction, i.e., fetched minus hit.
-
-
-
- All functions to access information about backends are indexed by backend id
- number, except pg_stat_get_activity which is indexed by PID.
- The function pg_stat_get_backend_idset provides
- a convenient way to generate one row for each active server process. For
- example, to show the
PIDs and current queries of all server processes: -
-SELECT pg_stat_get_backend_pid(s.backendid) AS pid,
- pg_stat_get_backend_activity(s.backendid) AS query
- FROM (SELECT pg_stat_get_backend_idset() AS backendid) AS s;
-
-
-
projects / postgresql.git / commitdiff