| From: | PG Bug reporting form <noreply(at)postgresql(dot)org> |
|---|---|
| To: | pgsql-bugs(at)lists(dot)postgresql(dot)org |
| Cc: | namdevrahul(at)gmail(dot)com |
| Subject: | BUG #16907: Performance issue after big table drop and recreate |
| Date: | 2021-03-01 12:15:41 |
| Message-ID: | 16907-5d18e09e080a1bba@postgresql.org |
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| Lists: | pgsql-bugs |
The following bug has been logged on the website:
Bug reference: 16907
Logged by: Rahul Namdeo
Email address: namdevrahul(at)gmail(dot)com
PostgreSQL version: 10.15
Operating system: NAME="Ubuntu" VERSION="18.04.3 LTS (Bionic Beaver)
Description:
1. Took pg_dump of 580 GB table with no data.
2. Rename the original table to TABLE1_original
3. Dropped the five indexes approx 1.2 TB on this table.
4. Did a pg_restore from the backup taken.
5. Created the indexes / constraints and provided all the grants as
required.
6 Run the Application process for report generation. It took 25 mins for
single day report which was expected behavior.
7. However after 3-4 days run the performance was degraded and the same
report now takes 2.5 Hours.
Any help will be appreciated. Kindly support.
NOTE: the Environment is on AWS Cloud Server is M5.4xLarge (16 Core 61 GB)
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