Zabbix/partitioning
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Enhance partitioning logic and update Zabbix config template

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This commit is contained in:
Maksym Buz
2026-04-02 17:02:18 +00:00
parent f83adeee8a
commit fb65b2f1e7
5 changed files with 81 additions and 14 deletions
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51
postgresql/procedures/01_maintenance.sql
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@@ -43,6 +43,8 @@ BEGIN
IF p_period = 'month' THEN
v_suffix := to_char(p_start_time, 'YYYYMM');
ELSIF p_period LIKE '%hour%' THEN
v_suffix := to_char(p_start_time, 'YYYYMMDDHH24');
ELSE
v_suffix := to_char(p_start_time, 'YYYYMMDD');
END IF;
@@ -91,26 +93,47 @@ BEGIN
BEGIN
IF length(v_suffix) = 6 THEN -- YYYYMM
v_partition_date := to_timestamp(v_suffix || '01', 'YYYYMMDD') AT TIME ZONE 'UTC';
-- For monthly, we check if the END of the month is older than retention?
-- Or just strict retention.
-- To be safe, adding 1 month to check vs cutoff.
IF extract(epoch from (v_partition_date + '1 month'::interval)) < v_cutoff_ts THEN
ELSIF length(v_suffix) = 8 THEN -- YYYYMMDD
v_partition_date := to_timestamp(v_suffix, 'YYYYMMDD') AT TIME ZONE 'UTC';
ELSIF length(v_suffix) = 10 THEN -- YYYYMMDDHH
v_partition_date := to_timestamp(v_suffix, 'YYYYMMDDHH24') AT TIME ZONE 'UTC';
ELSE
CONTINUE; -- Ignore non-matching suffix lengths
END IF;
EXCEPTION WHEN OTHERS THEN
-- Safely ignore parsing errors for oddly named partitions
CONTINUE;
END;
-- Now check retention and execute DROP TABLE (so dropping errors are correctly raised!)
IF length(v_suffix) = 6 THEN -- YYYYMM
IF extract(epoch from (v_partition_date + '1 month'::interval)) < v_cutoff_ts THEN
RAISE NOTICE 'Dropping old partition %', v_partition.partition_name;
EXECUTE format('DROP TABLE %I.%I', v_partition.partition_schema, v_partition.partition_name);
COMMIT; -- Release lock immediately
END IF;
ELSIF length(v_suffix) = 8 THEN -- YYYYMMDD
-- If period is weekly, the partition spans an entire week. Otherwise, it spans one day.
IF p_period = 'week' THEN
IF extract(epoch from (v_partition_date + '1 week'::interval)) < v_cutoff_ts THEN
RAISE NOTICE 'Dropping old partition %', v_partition.partition_name;
EXECUTE format('DROP TABLE %I.%I', v_partition.partition_schema, v_partition.partition_name);
COMMIT; -- Release lock immediately
END IF;
ELSIF length(v_suffix) = 8 THEN -- YYYYMMDD
v_partition_date := to_timestamp(v_suffix, 'YYYYMMDD') AT TIME ZONE 'UTC';
ELSE
IF extract(epoch from (v_partition_date + '1 day'::interval)) < v_cutoff_ts THEN
RAISE NOTICE 'Dropping old partition %', v_partition.partition_name;
EXECUTE format('DROP TABLE %I.%I', v_partition.partition_schema, v_partition.partition_name);
COMMIT; -- Release lock immediately
END IF;
END IF;
EXCEPTION WHEN OTHERS THEN
-- Ignore parsing errors for non-standard partitions
NULL;
END;
ELSIF length(v_suffix) = 10 THEN -- YYYYMMDDHH
IF extract(epoch from (v_partition_date + p_period::interval)) < v_cutoff_ts THEN
RAISE NOTICE 'Dropping old partition %', v_partition.partition_name;
EXECUTE format('DROP TABLE %I.%I', v_partition.partition_schema, v_partition.partition_name);
COMMIT; -- Release lock immediately
END IF;
END IF;
END LOOP;
END;
$$;
@@ -145,8 +168,14 @@ BEGIN
v_start_time := date_trunc('month', now() AT TIME ZONE 'UTC');
-- Approximate 30 days per month (2592000 seconds)
v_past_iterations := ceil(extract(epoch from p_keep_history) / 2592000)::integer;
ELSIF p_period LIKE '%hour%' THEN
v_period_interval := p_period::interval;
v_start_time := date_trunc('hour', now() AT TIME ZONE 'UTC');
v_past_iterations := ceil(extract(epoch from p_keep_history) / extract(epoch from v_period_interval))::integer;
ELSE
RETURN;
RAISE EXCEPTION 'Unsupported partitioning period: %', p_period;
END IF;
-- 1. Create Future Partitions (Current + Buffer)