[Bug] Failed to get the instance memory usage keep running

[Vonng]

Describe the bug

https://github.com/ApsaraDB/PolarDB-for-PostgreSQL/releases/tag/v15.12.3.0

install rpm/deb, init data dir and launch database server without any further configuration, it throws the following message every seconds

WARNING:  Failed to get the instance memory usage

To Reproduce
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2. xxx
3. xxx

Expected behavior
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Environment (please complete the following information):

• OS: el / debian / ubuntu
• Version [e.g. 22]

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[polardb-bot]

Hi @Vonng ~ Thanks for opening this issue! 🎉

Please make sure you have provided enough information for subsequent discussion.

We will get back to you as soon as possible. ❤️

[shawnwang-dev]

Describe the bug

https://github.com/ApsaraDB/PolarDB-for-PostgreSQL/releases/tag/v15.12.3.0

install rpm/deb, init data dir and launch database server without any further configuration, it throws the following message every seconds

WARNING:  Failed to get the instance memory usage

Hi @Vonng , thank you for your feedback. This warning is triggered by the database's failure to acquire cgroup data, which stems from PolarDB-PG's memory restriction mechanism designed to prevent OOM (Out of Memory) errors. To suppress such warning, you could disable this functionality by setting the parameter polar_resource_manager.enable_resource_manager to off. We will disable this parameter by default in subsequent releases.

[hegphegp]

in postgresql.conf file, config the parameter polar_resource_manager.enable_resource_manager to off

echo 'polar_resource_manager.enable_resource_manager=off' >> ${polardb_pg_data_path}/postgresql.conf