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  1. MariaDB Server
  2. MDEV-17159

Document what is included in core dumps

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    Description

      After the implementation of MDEV-10814, core dumps no longer contain the server's whole process address space in 10.3.7 and above. We should probably document what specifically is excluded. It could probably go in the following section of the documentation:

      https://mariadb.com/kb/en/library/enabling-core-dumps/#whats-included-in-core-dumps

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          Task - A task that needs to be done. MDEV-10814 Feature request: Optionally exclude large buffers from core dumps

          • Major - Major loss of function.
          • Closed

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            GeoffMontee Geoff Montee (Inactive) added a comment -

            It looks like danblack and marko worked on PR #364, so they might have input on this.

            https://github.com/MariaDB/server/pull/364

            Based on comments in the PR, it looks like the following might be excluded:

            • InnoDB buffer pool
            • InnoDB log buffer
            • Server recv buffer

            And it looks like this exclusion might only apply to non-debug builds.

            GeoffMontee Geoff Montee (Inactive) added a comment - It looks like danblack and marko worked on PR #364, so they might have input on this. https://github.com/MariaDB/server/pull/364 Based on comments in the PR, it looks like the following might be excluded: InnoDB buffer pool InnoDB log buffer Server recv buffer And it looks like this exclusion might only apply to non-debug builds.
            GeoffMontee Geoff Montee (Inactive) added a comment -

            It looks like the query cache is also excluded due to PR #366.

            https://github.com/MariaDB/server/pull/366

            GeoffMontee Geoff Montee (Inactive) added a comment - It looks like the query cache is also excluded due to PR #366. https://github.com/MariaDB/server/pull/366
            danblack Daniel Black added a comment -

            Correct. worth noting its Linux only when the running kernel version is 3.4+.

            danblack Daniel Black added a comment - Correct. worth noting its Linux only when the running kernel version is 3.4+.
            GeoffMontee Geoff Montee (Inactive) added a comment -

            I've added that info here:

            https://mariadb.com/kb/en/library/enabling-core-dumps/#whats-included-in-core-dumps

            GeoffMontee Geoff Montee (Inactive) added a comment - I've added that info here: https://mariadb.com/kb/en/library/enabling-core-dumps/#whats-included-in-core-dumps
            danblack Daniel Black added a comment -

            Looks good thanks. You saw the kernel notes I added on MDEV-10814 and MDEV-17985 that on specific unfixed kernel versions, can leave a warning in the log.

            danblack Daniel Black added a comment - Looks good thanks. You saw the kernel notes I added on MDEV-10814 and MDEV-17985 that on specific unfixed kernel versions, can leave a warning in the log.
            GeoffMontee Geoff Montee (Inactive) added a comment -

            I added some info about that too. Thanks!

            GeoffMontee Geoff Montee (Inactive) added a comment - I added some info about that too. Thanks!
            GeoffMontee Geoff Montee (Inactive) added a comment -

            I'll go ahead and close this, but if I missed anything in the doc edits, feel free to let me know.

            GeoffMontee Geoff Montee (Inactive) added a comment - I'll go ahead and close this, but if I missed anything in the doc edits, feel free to let me know.

            People

              greenman Ian Gilfillan
              GeoffMontee Geoff Montee (Inactive)
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