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[+] add lag in milliseconds to replication metrics #607

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Feb 21, 2023
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[+] add lag in milliseconds to replication metrics #607

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3 changes: 3 additions & 0 deletions pgwatch2/metrics/replication/10/metric.sql
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,9 @@ select /* pgwatch2_generated */
coalesce(pg_wal_lsn_diff(case when pg_is_in_recovery() then pg_last_wal_receive_lsn() else pg_current_wal_lsn() end, write_lsn)::int8, 0) as write_lag_b,
coalesce(pg_wal_lsn_diff(case when pg_is_in_recovery() then pg_last_wal_receive_lsn() else pg_current_wal_lsn() end, flush_lsn)::int8, 0) as flush_lag_b,
coalesce(pg_wal_lsn_diff(case when pg_is_in_recovery() then pg_last_wal_receive_lsn() else pg_current_wal_lsn() end, replay_lsn)::int8, 0) as replay_lag_b,
(extract(epoch from write_lag) * 1000)::int8 as write_lag_ms,
(extract(epoch from flush_lag) * 1000)::int8 as flush_lag_ms,
(extract(epoch from replay_lag) * 1000)::int8 as replay_lag_ms,
state,
sync_state,
case when sync_state in ('sync', 'quorum') then 1 else 0 end as is_sync_int,
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3 changes: 3 additions & 0 deletions pgwatch2/sql/config_store/metric_definitions.sql
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Expand Up @@ -1652,6 +1652,9 @@ SELECT
coalesce(pg_wal_lsn_diff(case when pg_is_in_recovery() then pg_last_wal_receive_lsn() else pg_current_wal_lsn() end, write_lsn)::int8, 0) as write_lag_b,
coalesce(pg_wal_lsn_diff(case when pg_is_in_recovery() then pg_last_wal_receive_lsn() else pg_current_wal_lsn() end, flush_lsn)::int8, 0) as flush_lag_b,
coalesce(pg_wal_lsn_diff(case when pg_is_in_recovery() then pg_last_wal_receive_lsn() else pg_current_wal_lsn() end, replay_lsn)::int8, 0) as replay_lag_b,
(extract(epoch from write_lag) * 1000)::int8 as write_lag_ms,
(extract(epoch from flush_lag) * 1000)::int8 as flush_lag_ms,
(extract(epoch from replay_lag) * 1000)::int8 as replay_lag_ms,
state,
sync_state,
case when sync_state in ('sync', 'quorum') then 1 else 0 end as is_sync_int,
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