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Don't check status of logical replication slots

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We only want to check the status of physical replication slots
to determine whether a streaming replication standby has become
detached and there is therefore a risk of uncontrolled WAL buildup
on the local node.

It's not feasible to second-guess the state of logical replication
slots.
This commit is contained in:
Ian Barwick
2019-02-23 09:53:29 +09:00
parent 5abec2bb97
commit 71d151ca87
5 changed files with 39 additions and 19 deletions
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10
dbutils.c
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@@ -3982,7 +3982,8 @@ get_free_replication_slot_count(PGconn *conn)
appendPQExpBufferStr(&query,
" SELECT pg_catalog.current_setting('max_replication_slots')::INT - "
" pg_catalog.count(*) AS free_slots"
" FROM pg_catalog.pg_replication_slots");
" FROM pg_catalog.pg_replication_slots s"
" WHERE s.slot_type = 'physical'");
res = PQexec(conn, query.data);
@@ -4022,6 +4023,7 @@ get_inactive_replication_slots(PGconn *conn, KeyValueList *list)
" SELECT slot_name, slot_type "
" FROM pg_catalog.pg_replication_slots "
" WHERE active IS FALSE "
" AND slot_type = 'physical' "
" ORDER BY slot_name ");
res = PQexec(conn, query.data);
@@ -4952,9 +4954,9 @@ get_node_replication_stats(PGconn *conn, t_node_info *node_info)
{
appendPQExpBufferStr(&query,
" current_setting('max_replication_slots')::INT AS max_replication_slots, "
" (SELECT pg_catalog.count(*) FROM pg_catalog.pg_replication_slots) AS total_replication_slots, "
" (SELECT pg_catalog.count(*) FROM pg_catalog.pg_replication_slots WHERE active IS TRUE) AS active_replication_slots, "
" (SELECT pg_catalog.count(*) FROM pg_catalog.pg_replication_slots WHERE active IS FALSE) AS inactive_replication_slots, ");
" (SELECT pg_catalog.count(*) FROM pg_catalog.pg_replication_slots WHERE slot_type='physical') AS total_replication_slots, "
" (SELECT pg_catalog.count(*) FROM pg_catalog.pg_replication_slots WHERE active IS TRUE AND slot_type='physical') AS active_replication_slots, "
" (SELECT pg_catalog.count(*) FROM pg_catalog.pg_replication_slots WHERE active IS FALSE AND slot_type='physical') AS inactive_replication_slots, ");
}