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I'm using docker-compose to run my database container that has fairly small memory limit (using mem_limit setting).

Will the docker host disk cache be used (no mem limit) by the postgres container, or should I make sure the container has enough free memory for disk caching?

Using Debian 4.9.246-2 linux host

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  • This is not a dba question. The answer would presumably be the same whether you had a bitcoin miner or Duke Nukem running inside the container rather than a database.
    – jjanes
    Aug 4, 2021 at 14:09
  • @jjanes the answer is the same, but my use case is running a database. I think this info should be valuable for a db admin managing a docker db instance.
    – cdalxndr
    Aug 4, 2021 at 14:27
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    Sure, and maybe you will get lucky here, but I think you are more likely to find the correct info from a docker expert than a database expert.
    – jjanes
    Aug 5, 2021 at 1:35

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