| From: | Madhu Sudan <madhusudan0429(at)gmail(dot)com> |
|---|---|
| To: | pgsql-admin(at)lists(dot)postgresql(dot)org |
| Subject: | WAL restore is very slow |
| Date: | 2022-08-29 10:10:34 |
| Message-ID: | CABai+ZMELUgce33KXvMXmRcHfhRkdbmkfP6kWdq_kQC8KtU81A@mail.gmail.com |
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| Lists: | pgsql-admin |
Hi
We have PG-14 with a huge data set of 14 TB running on r5b.2xlarge. We have
set up WAL archiving and restoring them onto a replica server. The WAL
restore on the replica is very slow and we are not able to achieve the 4
hour delayed replica. It is always behind 30 hrs with the huge WAL
generation.
I have checked the following and they look fine
1. Bottlenecks on the replica server
2. Memory consumption and swap
3. EFS IO throughput
4.checkpoint_completion_target = 0.9
5. wal_buffers = 16MB
6. wal_log_hints = on
7. Verified logs and didn't find anything useful related to the issue
Can you please suggest how to improve the WAL restore performance
Thank you
Madhu Sudan
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