netdata/health/health.d/postgres.conf

# you can disable an alarm notification by setting the 'to' line to: silent

 template: postgres_total_connection_utilization
       on: postgres.connections_utilization
    class: Utilization
     type: Database
component: PostgreSQL
    hosts: *
   lookup: average -1m unaligned of used
    units: %
    every: 1m
     warn: $this > (($status >= $WARNING)  ? (70) : (80))
     crit: $this > (($status == $CRITICAL) ? (80) : (90))
    delay: down 15m multiplier 1.5 max 1h
     info: average total connection utilization over the last minute
       to: dba

 template: postgres_acquired_locks_utilization
       on: postgres.locks_utilization
    class: Utilization
     type: Database
component: PostgreSQL
    hosts: *
   lookup: average -1m unaligned of used
    units: %
    every: 1m
     warn: $this > (($status >= $WARNING)  ? (15) : (20))
    delay: down 15m multiplier 1.5 max 1h
     info: average acquired locks utilization over the last minute
       to: dba

 template: postgres_txid_exhaustion_perc
       on: postgres.txid_exhaustion_perc
    class: Utilization
     type: Database
component: PostgreSQL
    hosts: *
     calc: $txid_exhaustion	
    units: %
    every: 1m
     warn: $this > 90
    delay: down 15m multiplier 1.5 max 1h
     info: percent towards TXID wraparound
       to: dba

# Database alarms

 template: postgres_db_cache_io_ratio
       on: postgres.db_cache_io_ratio
    class: Workload
     type: Database
component: PostgreSQL
    hosts: *
   lookup: average -1m unaligned of miss
     calc: 100 - $this
    units: %
    every: 1m
     warn: $this < (($status >= $WARNING)  ? (70) : (60))
     crit: $this < (($status == $CRITICAL) ? (60) : (50))
    delay: down 15m multiplier 1.5 max 1h
     info: average cache hit ratio in db ${label:database} over the last minute
       to: dba

 template: postgres_db_transactions_rollback_ratio	
       on: postgres.db_transactions_ratio
    class: Workload
     type: Database
component: PostgreSQL
    hosts: *
   lookup: average -5m unaligned of rollback
    units: %
    every: 1m
     warn: $this > (($status >= $WARNING)  ? (0) : (2))
    delay: down 15m multiplier 1.5 max 1h
     info: average aborted transactions percentage in db ${label:database} over the last five minutes
       to: dba

 template: postgres_db_deadlocks_rate
       on: postgres.db_deadlocks_rate
    class: Errors
     type: Database
component: PostgreSQL
    hosts: *
   lookup: sum -1m unaligned of deadlocks
    units: deadlocks
    every: 1m
     warn: $this > (($status >= $WARNING)  ? (0) : (10))
    delay: down 15m multiplier 1.5 max 1h
     info: number of deadlocks detected in db ${label:database} in the last minute
       to: dba

# Table alarms

 template: postgres_table_cache_io_ratio
       on: postgres.table_cache_io_ratio
    class: Workload
     type: Database
component: PostgreSQL
    hosts: *
   lookup: average -1m unaligned of miss
     calc: 100 - $this
    units: %
    every: 1m
     warn: $this < (($status >= $WARNING)  ? (70) : (60))
     crit: $this < (($status == $CRITICAL) ? (60) : (50))
    delay: down 15m multiplier 1.5 max 1h
     info: average cache hit ratio in db ${label:database} table ${label:table} over the last minute
       to: dba

 template: postgres_table_index_cache_io_ratio
       on: postgres.table_index_cache_io_ratio
    class: Workload
     type: Database
component: PostgreSQL
    hosts: *
   lookup: average -1m unaligned of miss
     calc: 100 - $this
    units: %
    every: 1m
     warn: $this < (($status >= $WARNING)  ? (70) : (60))
     crit: $this < (($status == $CRITICAL) ? (60) : (50))
    delay: down 15m multiplier 1.5 max 1h
     info: average index cache hit ratio in db ${label:database} table ${label:table} over the last minute
       to: dba

 template: postgres_table_toast_cache_io_ratio
       on: postgres.table_toast_cache_io_ratio
    class: Workload
     type: Database
component: PostgreSQL
    hosts: *
   lookup: average -1m unaligned of miss
     calc: 100 - $this
    units: %
    every: 1m
     warn: $this < (($status >= $WARNING)  ? (70) : (60))
     crit: $this < (($status == $CRITICAL) ? (60) : (50))
    delay: down 15m multiplier 1.5 max 1h
     info: average TOAST hit ratio in db ${label:database} table ${label:table} over the last minute
       to: dba

 template: postgres_table_toast_index_cache_io_ratio
       on: postgres.table_toast_index_cache_io_ratio
    class: Workload
     type: Database
component: PostgreSQL
    hosts: *
   lookup: average -1m unaligned of miss
     calc: 100 - $this
    units: %
    every: 1m
     warn: $this < (($status >= $WARNING)  ? (70) : (60))
     crit: $this < (($status == $CRITICAL) ? (60) : (50))
    delay: down 15m multiplier 1.5 max 1h
     info: average index TOAST hit ratio in db ${label:database} table ${label:table} over the last minute
       to: dba

 template: postgres_table_bloat_size_perc
       on: postgres.table_bloat_size_perc
    class: Errors
     type: Database
component: PostgreSQL
    hosts: *
     calc: ($table_size > (1024 * 1024 * 100)) ? ($bloat) : (0)
    units: %
    every: 1m
     warn: $this > (($status >= $WARNING)  ? (60) : (70))
     crit: $this > (($status == $CRITICAL) ? (70) : (80))
    delay: down 15m multiplier 1.5 max 1h
     info: bloat size percentage in db ${label:database} table ${label:table}
       to: dba

 template: postgres_table_last_autovacuum_time
       on: postgres.table_autovacuum_since_time
    class: Errors
     type: Database
component: PostgreSQL
    hosts: !*
     calc: $time
    units: seconds
    every: 1m
     warn: $this != nan AND $this > (60 * 60 * 24 * 7)
     info: time elapsed since db ${label:database} table ${label:table} was vacuumed by the autovacuum daemon
       to: dba

 template: postgres_table_last_autoanalyze_time
       on: postgres.table_autoanalyze_since_time
    class: Errors
     type: Database
component: PostgreSQL
    hosts: !*
     calc: $time
    units: seconds
    every: 1m
     warn: $this != nan AND $this > (60 * 60 * 24 * 7)
     info: time elapsed since db ${label:database} table ${label:table} was analyzed by the autovacuum daemon
       to: dba

# Index alarms

 template: postgres_index_bloat_size_perc
       on: postgres.index_bloat_size_perc
    class: Errors
     type: Database
component: PostgreSQL
    hosts: *
     calc: ($index_size > (1024 * 1024 * 10)) ? ($bloat) : (0)
    units: %
    every: 1m
     warn: $this > (($status >= $WARNING)  ? (60) : (70))
     crit: $this > (($status == $CRITICAL) ? (70) : (80))
    delay: down 15m multiplier 1.5 max 1h
     info: bloat size percentage in db ${label:database} table ${label:table} index ${label:index}
       to: dba