PMM-8618 ship default PG queries in PMM (percona#46)

Author: adivinho

queries.yaml

@@ -1,5 +1,5 @@
 pg_replication:
-  query: "SELECT EXTRACT(EPOCH FROM (now() - pg_last_xact_replay_timestamp())) as lag"
+  query: "SELECT CASE WHEN NOT pg_is_in_recovery() THEN 0 ELSE GREATEST (0, EXTRACT(EPOCH FROM (now() - pg_last_xact_replay_timestamp()))) END AS lag"
   master: true
   metrics:
     - lag:
@@ -15,7 +15,32 @@ pg_postmaster:
         description: "Time at which postmaster started"
 
 pg_stat_user_tables:
-  query: "SELECT current_database() datname, schemaname, relname, seq_scan, seq_tup_read, idx_scan, idx_tup_fetch, n_tup_ins, n_tup_upd, n_tup_del, n_tup_hot_upd, n_live_tup, n_dead_tup, n_mod_since_analyze, COALESCE(last_vacuum, '1970-01-01Z'), COALESCE(last_vacuum, '1970-01-01Z') as last_vacuum, COALESCE(last_autovacuum, '1970-01-01Z') as last_autovacuum, COALESCE(last_analyze, '1970-01-01Z') as last_analyze, COALESCE(last_autoanalyze, '1970-01-01Z') as last_autoanalyze, vacuum_count, autovacuum_count, analyze_count, autoanalyze_count FROM pg_stat_user_tables"
+  query: |
+   SELECT
+     current_database() datname,
+     schemaname,
+     relname,
+     seq_scan,
+     seq_tup_read,
+     idx_scan,
+     idx_tup_fetch,
+     n_tup_ins,
+     n_tup_upd,
+     n_tup_del,
+     n_tup_hot_upd,
+     n_live_tup,
+     n_dead_tup,
+     n_mod_since_analyze,
+     COALESCE(last_vacuum, '1970-01-01Z') as last_vacuum,
+     COALESCE(last_autovacuum, '1970-01-01Z') as last_autovacuum,
+     COALESCE(last_analyze, '1970-01-01Z') as last_analyze,
+     COALESCE(last_autoanalyze, '1970-01-01Z') as last_autoanalyze,
+     vacuum_count,
+     autovacuum_count,
+     analyze_count,
+     autoanalyze_count
+   FROM
+     pg_stat_user_tables
   metrics:
     - datname:
         usage: "LABEL"
@@ -122,75 +147,84 @@ pg_statio_user_tables:
         description: "Number of buffer hits in this table's TOAST table indexes (if any)"
 
 pg_database:
-  query: "SELECT pg_database.datname, pg_database_size(pg_database.datname) as size FROM pg_database"
+  query: "SELECT pg_database.datname, pg_database_size(pg_database.datname) as size_bytes FROM pg_database"
   master: true
   cache_seconds: 30
   metrics:
     - datname:
         usage: "LABEL"
         description: "Name of the database"
-    - size:
+    - size_bytes:
         usage: "GAUGE"
         description: "Disk space used by the database"
 
-pg_stat_statements:
-  query: "SELECT
-             pg_get_userbyid(userid) as user,
-             pg_database.datname,
-             pg_stat_statements.queryid,
-             pg_stat_statements.query,
-             pg_stat_statements.calls,
-             pg_stat_statements.total_time as time_milliseconds,
-             pg_stat_statements.rows,
-             pg_stat_statements.shared_blks_hit,
-             pg_stat_statements.shared_blks_read,
-             pg_stat_statements.shared_blks_dirtied,
-             pg_stat_statements.shared_blks_written,
-             pg_stat_statements.local_blks_hit,
-             pg_stat_statements.local_blks_read,
-             pg_stat_statements.local_blks_dirtied,
-             pg_stat_statements.local_blks_written,
-             pg_stat_statements.temp_blks_read,
-             pg_stat_statements.temp_blks_written,
-             pg_stat_statements.blk_read_time,
-             pg_stat_statements.blk_write_time
-          FROM pg_stat_statements
-          JOIN pg_database
-          ON pg_database.oid = pg_stat_statements.dbid"
-  metrics:
-    - user:
-        usage: "LABEL"
-        description: "The user who executed the statement"
-    - datname:
-        usage: "LABEL"
-        description: "The database in which the statement was executed"
-    - queryid:
-        usage: "LABEL"
-        description: "Internal hash code, computed from the statement's parse tree"
-    - query:
-        usage: "LABEL"
-        description: "Processed query"
-    - calls:
-        usage: "COUNTER"
-        description: "Number of times executed"
-    - time_milliseconds:
-        usage: "COUNTER"
-        description: "Total time spent in the statement, in milliseconds"
-    - rows:
-        usage: "COUNTER"
-        description: "Total number of rows retrieved or affected by the statement"
-    - shared_blks_hit:
-        usage: "COUNTER"
-        description: "Total number of shared block cache hits by the statement"
-    - shared_blks_read:
-        usage: "COUNTER"
-        description: "Total number of shared blocks read by the statement"
-    - shared_blks_dirtied:
-        usage: "COUNTER"
-        description: "Total number of shared blocks dirtied by the statement"
-    - shared_blks_written:
-        usage: "COUNTER"
-        description: "Total number of shared blocks written by the statement"
-    - local_blks_hit:
-        usage: "COUNTER"
-        description: "Total number of local block cache hits by the statement"
+#pg_stat_statements:
+#  query: "SELECT t2.rolname, t3.datname, queryid, calls, total_time / 1000 as total_time_seconds, min_time / 1000 as min_time_seconds, max_time / 1000 as max_time_seconds, mean_time / 1000 as mean_time_seconds, stddev_time / 1000 as stddev_time_seconds, rows, shared_blks_hit, shared_blks_read, shared_blks_dirtied, shared_blks_written, local_blks_hit, local_blks_read, local_blks_dirtied, local_blks_written, temp_blks_read, temp_blks_written, blk_read_time / 1000 as blk_read_time_seconds, blk_write_time / 1000 as blk_write_time_seconds FROM pg_stat_statements t1 JOIN pg_roles t2 ON (t1.userid=t2.oid) JOIN pg_database t3 ON (t1.dbid=t3.oid) WHERE t2.rolname != 'rdsadmin'"
+#  master: true
+#  metrics:
+#    - rolname:
+#        usage: "LABEL"
+#        description: "Name of user"
+#    - datname:
+#        usage: "LABEL"
+#        description: "Name of database"
+#    - queryid:
+#        usage: "LABEL"
+#        description: "Query ID"
+#    - calls:
+#        usage: "COUNTER"
+#        description: "Number of times executed"
+#    - total_time_seconds:
+#        usage: "COUNTER"
+#        description: "Total time spent in the statement, in milliseconds"
+#    - min_time_seconds:
+#        usage: "GAUGE"
+#        description: "Minimum time spent in the statement, in milliseconds"
+#    - max_time_seconds:
+#        usage: "GAUGE"
+#        description: "Maximum time spent in the statement, in milliseconds"
+#    - mean_time_seconds:
+#        usage: "GAUGE"
+#        description: "Mean time spent in the statement, in milliseconds"
+#    - stddev_time_seconds:
+#        usage: "GAUGE"
+#        description: "Population standard deviation of time spent in the statement, in milliseconds"
+#    - rows:
+#        usage: "COUNTER"
+#        description: "Total number of rows retrieved or affected by the statement"
+#    - shared_blks_hit:
+#        usage: "COUNTER"
+#        description: "Total number of shared block cache hits by the statement"
+#    - shared_blks_read:
+#        usage: "COUNTER"
+#        description: "Total number of shared blocks read by the statement"
+#    - shared_blks_dirtied:
+#        usage: "COUNTER"
+#        description: "Total number of shared blocks dirtied by the statement"
+#    - shared_blks_written:
+#        usage: "COUNTER"
+#        description: "Total number of shared blocks written by the statement"
+#    - local_blks_hit:
+#        usage: "COUNTER"
+#        description: "Total number of local block cache hits by the statement"
+#    - local_blks_read:
+#        usage: "COUNTER"
+#        description: "Total number of local blocks read by the statement"
+#    - local_blks_dirtied:
+#        usage: "COUNTER"
+#        description: "Total number of local blocks dirtied by the statement"
+#    - local_blks_written:
+#        usage: "COUNTER"
+#        description: "Total number of local blocks written by the statement"
+#    - temp_blks_read:
+#        usage: "COUNTER"
+#        description: "Total number of temp blocks read by the statement"
+#    - temp_blks_written:
+#        usage: "COUNTER"
+#        description: "Total number of temp blocks written by the statement"
+#    - blk_read_time_seconds:
+#        usage: "COUNTER"
+#        description: "Total time the statement spent reading blocks, in milliseconds (if track_io_timing is enabled, otherwise zero)"
+#    - blk_write_time_seconds:
+#        usage: "COUNTER"
+#        description: "Total time the statement spent writing blocks, in milliseconds (if track_io_timing is enabled, otherwise zero)"