In Postgres RDS my tables take around 500MB, but it says I am using 17GB?

Why does it say I am using so much more space?

I did a bit of searching, and it might be the temporary files. Can you tell me how to clear them? I haven't found a way to connect to RDS to view or clear those files.

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数据库迁移与现代化分析

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PostgreSQL Amazon Relational Database Service 数据库

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rePost-User-6685172

已提问 1 年前248 查看次数

1 回答

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这些答案有用吗？为正确答案投票，以帮助社区从您的知识中受益。

I would look into VACUUM: https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Appendix.PostgreSQL.CommonDBATasks.Autovacuum.html. It is a PostgreSQL feature that cleans up space caused by deleted or updated rows.

As an example, you can try to run SQL query to see if your tables need vacuuming:

SELECT datname, age(datfrozenxid) FROM pg_database ORDER BY age(datfrozenxid) desc limit 20;

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Antonio_Lagrotteria

已回答 1 年前

rePost-User-6685172
1 年前
I ran VACUUM FULL and it says 0 rows were updated.

I am suspecting that the problem is with temporary files, as I had the flag remove_temp_files_after_crash switched off by default, so a lot of garbage accumulated over time. Is there a way to clear those temporary files? I believe this is a managed DB so I can't access the files directly...

In Postgres RDS my tables take around 500MB, but it says I am using 17GB?

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