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feat: introduce configurable future partition buffer and add monitoring for future partitions.

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This commit is contained in:
Maksym Buz
2026-02-19 17:27:31 +00:00
parent bd15e707cc
commit 99e25f2efb
5 changed files with 21 additions and 11 deletions
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1
postgresql/procedures/00_partitions_init.sql
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@@ -11,6 +11,7 @@ CREATE TABLE IF NOT EXISTS partitions.config (
table_name text NOT NULL,
period text NOT NULL CHECK (period IN ('day', 'week', 'month', 'year')),
keep_history interval NOT NULL,
future_partitions integer NOT NULL DEFAULT 5,
last_updated timestamp WITH TIME ZONE DEFAULT now(),
PRIMARY KEY (table_name)
);

9
postgresql/procedures/02_maintenance.sql
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@@ -105,7 +105,8 @@ $$;
CREATE OR REPLACE PROCEDURE partitions.maintain_table(
p_table_name text,
p_period text,
p_keep_history interval
p_keep_history interval,
p_future_partitions integer DEFAULT 5
) LANGUAGE plpgsql AS $$
DECLARE
v_start_time timestamp with time zone;
@@ -139,8 +140,8 @@ BEGIN
RETURN;
END IF;
-- 1. Create Future Partitions (Current + 3 ahead)
FOR i IN 0..3 LOOP
-- 1. Create Future Partitions (Current + Buffer)
FOR i IN 0..p_future_partitions LOOP
CALL partitions.create_partition(
p_table_name,
v_start_time + (i * v_period_interval),
@@ -176,7 +177,7 @@ DECLARE
v_row record;
BEGIN
FOR v_row IN SELECT * FROM partitions.config LOOP
CALL partitions.maintain_table(v_row.table_name, v_row.period, v_row.keep_history);
CALL partitions.maintain_table(v_row.table_name, v_row.period, v_row.keep_history, v_row.future_partitions);
END LOOP;
END;
$$;

4
postgresql/procedures/03_enable_partitioning.sql
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@@ -27,9 +27,9 @@ BEGIN
-- 3. Create initial partitions
RAISE NOTICE 'Creating initial partitions for %...', v_table;
CALL partitions.maintain_table(v_table, v_row.period, v_row.keep_history);
CALL partitions.maintain_table(v_table, v_row.period, v_row.keep_history, v_row.future_partitions);
-- 4. (Optional) Copy data?
-- Optional: Migrate existing data
-- EXECUTE format('INSERT INTO public.%I SELECT * FROM public.%I', v_table, v_old_table);
ELSIF EXISTS (SELECT 1 FROM pg_class WHERE relname = v_table AND relkind = 'p') THEN

6
postgresql/procedures/04_monitoring_view.sql
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@@ -10,6 +10,12 @@ SELECT
c.period,
c.keep_history,
count(child.relname) AS partition_count,
count(child.relname) FILTER (
WHERE
(c.period = 'day' AND child.relname > (parent.relname || '_p' || to_char(now(), 'YYYYMMDD')))
OR
(c.period = 'month' AND child.relname > (parent.relname || '_p' || to_char(now(), 'YYYYMM')))
) AS future_partitions,
pg_size_pretty(sum(pg_total_relation_size(child.oid))) AS total_size,
min(child.relname) AS oldest_partition,
max(child.relname) AS newest_partition,