postgres.yaml

pg_stat_bgwriter:
  query: "SELECT checkpoints_timed, checkpoints_req, checkpoint_write_time / 1000 as checkpoint_write_time_seconds,
                 checkpoint_sync_time / 1000 as checkpoint_sync_time_seconds, buffers_checkpoint, buffers_clean,
                 maxwritten_clean, buffers_backend, buffers_backend_fsync, buffers_alloc, stats_reset
            FROM pg_stat_bgwriter"
  metrics:
    - checkpoints_timed:     
        usage: "COUNTER"
        description: "Number of scheduled checkpoints that have been performed"
    - checkpoints_req:       
        usage: "COUNTER"
        description: "Number of requested checkpoints that have been performed"
    - checkpoint_write_time_seconds: 
        usage: "COUNTER"
        description: "Total amount of time that has been spent in the portion of checkpoint processing where files are written to disk"
    - checkpoint_sync_time_seconds:  
        usage: "COUNTER"
        description: "Total amount of time that has been spent in the portion of checkpoint processing where files are synchronized to disk"
    - buffers_checkpoint:    
        usage: "COUNTER"
        description: "Number of buffers written during checkpoints"
    - buffers_clean:         
        usage: "COUNTER"
        description: "Number of buffers written by the background writer"
    - maxwritten_clean:      
        usage: "COUNTER"
        description: "Number of times the background writer stopped a cleaning scan because it had written too many buffers"
    - buffers_backend:       
        usage: "COUNTER"
        description: "Number of buffers written directly by a backend"
    - buffers_backend_fsync: 
        usage: "COUNTER"
        description: "Number of times a backend had to execute its own fsync call (normally the background writer handles those even when the backend does its own write)"
    - buffers_alloc:         
        usage: "COUNTER"
        description: "Number of buffers allocated"
    - stats_reset:           
        usage: "GAUGE"
        description: "Time at which these statistics were last reset"

pg_stat_database:
  query: "SELECT datid, datname, numbackends, xact_commit, xact_rollback, blks_read, blks_hit, tup_returned,
                 tup_fetched, tup_inserted, tup_updated, tup_deleted, conflicts, temp_files, temp_bytes,
                 deadlocks, blk_read_time, blk_write_time, stats_reset
            FROM pg_stat_database"
  metrics:
    - datid:          
        usage: "LABEL"
        description: "OID of this database"
    - datname:        
        usage: "LABEL"
        description: "Name of this database"
    - numbackends:    
        usage: "GAUGE"
        description: "Number of backends currently connected to this database. This is the only column in this view that returns a value reflecting current state; all other columns return the accumulated values since the last reset."
    - xact_commit:    
        usage: "COUNTER"
        description: "Number of transactions in this database that have been committed"
    - xact_rollback:  
        usage: "COUNTER"
        description: "Number of transactions in this database that have been rolled back"
    - blks_read:      
        usage: "COUNTER"
        description: "Number of disk blocks read in this database"
    - blks_hit:       
        usage: "COUNTER"
        description: "Number of times disk blocks were found already in the buffer cache, so that a read was not necessary (this only includes hits in the PostgreSQL buffer cache, not the operating system's file system cache)"
    - tup_returned:   
        usage: "COUNTER"
        description: "Number of rows returned by queries in this database"
    - tup_fetched:    
        usage: "COUNTER"
        description: "Number of rows fetched by queries in this database"
    - tup_inserted:   
        usage: "COUNTER"
        description: "Number of rows inserted by queries in this database"
    - tup_updated:    
        usage: "COUNTER"
        description: "Number of rows updated by queries in this database"
    - tup_deleted:    
        usage: "COUNTER"
        description: "Number of rows deleted by queries in this database"
    - conflicts:      
        usage: "COUNTER"
        description: "Number of queries canceled due to conflicts with recovery in this database. (Conflicts occur only on standby servers; see pg_stat_database_conflicts for details.)"
    - temp_files:     
        usage: "COUNTER"
        description: "Number of temporary files created by queries in this database. All temporary files are counted, regardless of why the temporary file was created (e.g., sorting or hashing), and regardless of the log_temp_files setting."
    - temp_bytes:     
        usage: "COUNTER"
        description: "Total amount of data written to temporary files by queries in this database. All temporary files are counted, regardless of why the temporary file was created, and regardless of the log_temp_files setting."
    - deadlocks:      
        usage: "COUNTER"
        description: "Number of deadlocks detected in this database"
    - blk_read_time:  
        usage: "COUNTER"
        description: "Time spent reading data file blocks by backends in this database, in milliseconds"
    - blk_write_time: 
        usage: "COUNTER"
        description: "Time spent writing data file blocks by backends in this database, in milliseconds"
    - stats_reset:    
        usage: "GAUGE"
        description: "Time at which these statistics were last reset"

pg_stat_database_conflicts:
  query: "SELECT datid, datname, confl_tablespace, confl_lock, confl_snapshot, confl_bufferpin, confl_deadlock FROM pg_stat_database_conflicts"
  metrics:
    - datid:            
        usage: "LABEL"
        description: "OID of a database"
    - datname:          
        usage: "LABEL"
        description: "Name of this database"
    - confl_tablespace: 
        usage: "COUNTER"
        description: "Number of queries in this database that have been canceled due to dropped tablespaces"
    - confl_lock:       
        usage: "COUNTER"
        description: "Number of queries in this database that have been canceled due to lock timeouts"
    - confl_snapshot:   
        usage: "COUNTER"
        description: "Number of queries in this database that have been canceled due to old snapshots"
    - confl_bufferpin:  
        usage: "COUNTER"
        description: "Number of queries in this database that have been canceled due to pinned buffers"
    - confl_deadlock:   
        usage: "COUNTER"
        description: "Number of queries in this database that have been canceled due to deadlocks"

pg_locks: 
  query: "SELECT pg_database.datname,tmp.mode,COALESCE(count,0) as count
            FROM (VALUES ('accesssharelock'),('rowsharelock'),('rowexclusivelock'),('shareupdateexclusivelock'),
                         ('sharelock'),('sharerowexclusivelock'),('exclusivelock'),('accessexclusivelock'))
                  AS tmp(mode)
            CROSS JOIN pg_database
            LEFT JOIN (SELECT database, lower(mode) AS mode,count(*) AS count
                         FROM pg_locks
                        WHERE database IS NOT NULL
                        GROUP BY database, lower(mode)) AS tmp2
              ON tmp.mode = tmp2.mode AND pg_database.oid = tmp2.database
            ORDER BY 1"
  metrics:
    - datname: 
        usage: "LABEL"
        description: "Name of this database"
    - mode:    
        usage: "LABEL"
        description: "Type of Lock"
    - count:   
        usage: "GAUGE"
        description: "Number of locks"

# pg_xlog_location_diff is gone in recent PG versions, need to figure out the
# right modern equiv, and if there isn't a common way to do it, how to manage
# multiple versions.

#pg_stat_replication:
#  query: "SELECT client_addr, state,
#                 pg_xlog_location_diff(pg_current_xlog_location(), replay_location)::float
#            FROM pg_stat_replication"
#  metrics:
#    - client_addr:
#        usage: "LABEL"
#        description: "IP address of the client connected to this WAL sender. If this field is null, it indicates that the client is connected via a Unix socket on the server machine."
#    - state:
#        usage: "LABEL"
#        description: "Current WAL sender state"
#    - pg_xlog_location_diff:
#        usage: "GAUGE"
#        description: "Lag in bytes between master and slave"

pg_stat_activity:
  query: "SELECT pg_database.datname,
                 tmp.state,
                 COALESCE(count,0) as count, 
                 COALESCE(max_tx_duration,0) as max_tx_duration
             FROM
                 (VALUES ('active'),('idle'),('idle in transaction'),('idle in transaction (aborted)'),('fastpath function call'),('disabled')) as tmp(state)
                 CROSS JOIN pg_database
                 LEFT JOIN (SELECT datname, state, count(*) AS count, MAX(EXTRACT(EPOCH FROM now() - xact_start))::float AS max_tx_duration
                              FROM pg_stat_activity GROUP BY datname,state) as tmp2 
                   ON tmp.state = tmp2.state AND pg_database.datname = tmp2.datname"
  metrics:
    - datname:         
        usage: "LABEL"
        description: "Name of this database"
    - state:           
        usage: "LABEL"
        description: "connection state"
    - count:           
        usage: "GAUGE"
        description: "number of connections in this state"
    - max_tx_duration: 
        usage: "GAUGE"
        description: "max duration in seconds any active transaction has been running"

pg_replication:
  query: "SELECT EXTRACT(EPOCH FROM (now() - pg_last_xact_replay_timestamp()))::INT as lag"
  metrics:
    - lag:
        usage: "GAUGE"
        description: "Replication lag behind master in seconds"

pg_postmaster:
  query: "SELECT pg_postmaster_start_time as start_time_seconds from pg_postmaster_start_time()"
  metrics:
    - start_time_seconds:
        usage: "GAUGE"
        description: "Time at which postmaster started"

pg_settings_shared_buffers:
  query: "SELECT 8192*setting::int as bytes from pg_settings where name = 'shared_buffers'"
  metrics:
    - bytes:
        usage: "GAUGE"
        description: "Size of shared_buffers"

pg_settings_checkpoint:
  query: "select (select setting::int from pg_settings where name = 'checkpoint_segments') as segments,
          (select setting::int from pg_settings where name = 'checkpoint_timeout') as timeout_seconds,
          (select setting::float from pg_settings where name = 'checkpoint_completion_target') as completion_target"
  metrics:
    - segments:
        usage: "GAUGE"
        description: "Number of checkpoint segments"
    - timeout_seconds:
        usage: "GAUGE"
        description: "Checkpoint timeout in seconds"
    - completion_target:
        usage: "GAUGE"
        description: "Checkpoint completion target, ranging from 0 to 1"

pg_stat_user_tables:
  metrics:
    - schemaname:
        usage: "LABEL"
        description: "Name of the schema that this table is in"
    - relname:
        usage: "LABEL"
        description: "Name of this table"
    - seq_scan:
        usage: "COUNTER"
        description: "Number of sequential scans initiated on this table"
    - seq_tup_read:
        usage: "COUNTER"
        description: "Number of live rows fetched by sequential scans"
    - idx_scan:
        usage: "COUNTER"
        description: "Number of index scans initiated on this table"
    - idx_tup_fetch:
        usage: "COUNTER"
        description: "Number of live rows fetched by index scans"
    - n_tup_ins:
        usage: "COUNTER"
        description: "Number of rows inserted"
    - n_tup_upd:
        usage: "COUNTER"
        description: "Number of rows updated"
    - n_tup_del:
        usage: "COUNTER"
        description: "Number of rows deleted"
    - n_tup_hot_upd:
        usage: "COUNTER"
        description: "Number of rows HOT updated (i.e., with no separate index update required)"
    - n_live_tup:
        usage: "GAUGE"
        description: "Estimated number of live rows"
    - n_dead_tup:
        usage: "GAUGE"
        description: "Estimated number of dead rows"
    - n_mod_since_analyze:
        usage: "GAUGE"
        description: "Estimated number of rows changed since last analyze"
    - last_vacuum:
        usage: "GAUGE"
        description: "Last time at which this table was manually vacuumed (not counting VACUUM FULL)"
    - last_autovacuum:
        usage: "GAUGE"
        description: "Last time at which this table was vacuumed by the autovacuum daemon"
    - last_analyze:
        usage: "GAUGE"
        description: "Last time at which this table was manually analyzed"
    - last_autoanalyze:
        usage: "GAUGE"
        description: "Last time at which this table was analyzed by the autovacuum daemon"
    - vacuum_count:
        usage: "COUNTER"
        description: "Number of times this table has been manually vacuumed (not counting VACUUM FULL)"
    - autovacuum_count:
        usage: "COUNTER"
        description: "Number of times this table has been vacuumed by the autovacuum daemon"
    - analyze_count:
        usage: "COUNTER"
        description: "Number of times this table has been manually analyzed"
    - autoanalyze_count:
        usage: "COUNTER"
        description: "Number of times this table has been analyzed by the autovacuum daemon"