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[+] add sent_lag and confirmed_flush_lsn_lag fields to replication metrics #700

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Dec 28, 2023
Merged

[+] add sent_lag and confirmed_flush_lsn_lag fields to replication metrics #700

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15c6da2
Additional metrics based on stat_statements stats
Oct 13, 2023
7645403
updating the files in the `metric` folder
Oct 16, 2023
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1 change: 1 addition & 0 deletions pgwatch2/metrics/replication/10/metric.sql
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,7 @@ select /* pgwatch2_generated */
(extract(epoch from now()) * 1e9)::int8 as epoch_ns,
application_name as tag_application_name,
concat(coalesce(client_addr::text, client_hostname), '_', client_port::text) as tag_client_info,
coalesce(pg_wal_lsn_diff(case when pg_is_in_recovery() then pg_last_wal_receive_lsn() else pg_current_wal_lsn() end, sent_lsn)::int8, 0) as sent_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, 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,
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1 change: 1 addition & 0 deletions pgwatch2/metrics/replication_slots/10/metric_master.sql
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Expand Up @@ -5,6 +5,7 @@ select /* pgwatch2_generated */
active,
case when active then 0 else 1 end as non_active_int,
pg_wal_lsn_diff(pg_current_wal_lsn(), restart_lsn)::int8 as restart_lsn_lag_b,
pg_wal_lsn_diff(pg_current_wal_lsn(), confirmed_flush_lsn)::int8 as confirmed_flush_lsn_lag_b,
greatest(age(xmin), age(catalog_xmin))::int8 as xmin_age_tx
from
pg_replication_slots;
2 changes: 2 additions & 0 deletions pgwatch2/sql/config_store/metric_definitions.sql
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Expand Up @@ -1834,6 +1834,7 @@ SELECT
(extract(epoch from now()) * 1e9)::int8 as epoch_ns,
application_name as tag_application_name,
concat(coalesce(client_addr::text, client_hostname), '_', client_port::text) as tag_client_info,
coalesce(pg_wal_lsn_diff(case when pg_is_in_recovery() then pg_last_wal_receive_lsn() else pg_current_wal_lsn() end, sent_lsn)::int8, 0) as sent_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, 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,
Expand Down Expand Up @@ -6929,6 +6930,7 @@ select
active,
case when active then 0 else 1 end as non_active_int,
pg_wal_lsn_diff(pg_current_wal_lsn(), restart_lsn)::int8 as restart_lsn_lag_b,
pg_wal_lsn_diff(pg_current_wal_lsn(), confirmed_flush_lsn)::int8 as confirmed_flush_lsn_lag_b,
greatest(age(xmin), age(catalog_xmin))::int8 as xmin_age_tx
from
pg_replication_slots;
Expand Down