An Inesrt on a partitioned table become very slow
| От | Tomer Praizler |
|---|---|
| Тема | An Inesrt on a partitioned table become very slow |
| Дата | |
| Msg-id | CAD=kdR9rs+3+NrfTAdA_8gaPfXQg5gt06F_Ddz4dY-WZcOLd5g@mail.gmail.com обсуждение исходный текст |
| Ответы |
Re: An Inesrt on a partitioned table become very slow
|
| Список | pgsql-novice |
Hey,
I use Postgres 10.1, and I have the following structure:
Parent table with columns:
range_value: double, timestamp: timestamp, device_id: integer, count:integer
which is partitioned with Partition key: LIST (range_value) which has a value of 1 - 26.
So basically it has 26 child partitions.
Each one of those partitions it partitioned by range. essentially a daily partition.
This is how the perant_table_with_range_value_1 is conofigured:
Partition of: perant_table FOR VALUES IN ('1')
Partition constraint: ((range_value IS NOT NULL) AND (range_value = ANY (ARRAY['0'::double precision])))
Partition key: RANGE ("timestamp")
At the moment I have 128 days of partitions in each one of the ranged partitioned.
Which means a total of 26 * 128 = 3328 total partitions.
My problem is that inserts became very slow.
I used to bulk insert 10000 rows in 6 seconds, now it takes 45 seconds.
Is this an expected behavior? is there something I missing?
Thank you!
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