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base repository: postgresql-cfbot/postgresql
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base: cf/5612~1
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head repository: postgresql-cfbot/postgresql
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compare: cf/5612
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  • 2 commits
  • 1 file changed
  • 2 contributors

Commits on Apr 26, 2025

  1. Process sync requests incrementally in AbsorbSyncRequests 

    If the number of sync requests is big enough, the palloc() call in
AbsorbSyncRequests() will attempt to allocate more than 1 GB of memory,
resulting in failure. This can lead to an infinite loop in the checkpointer
process, as it repeatedly fails to absorb the pending requests.

To avoid this, we process requests incrementally in batches. This patch
introduces a bounded ring buffer for storing checkpointer sync requests,
ensuring that memory usage stays within a safe range and avoiding
excessive allocations.

Original author: Maxim Orlov <[email protected]>
Patch updated and revised by: Xuneng Zhou <[email protected]>
    Maxim Orlov authored and Commitfest Bot committed Apr 26, 2025
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  2. [CF 5612] v6 - Avoid infinite loop in checkpointer 

    This branch was automatically generated by a robot using patches from an
email thread registered at:

https://commitfest.postgresql.org/patch/5612

The branch will be overwritten each time a new patch version is posted to
the thread, and also periodically to check for bitrot caused by changes
on the master branch.

Patch(es): https://www.postgresql.org/message-id/CABPTF7VbszDaqyqS8WeyxJgyyjHvb9x1L3Ls7gSwr3KuiBr0wg@mail.gmail.com
Author(s): Maxim Orlov
    Commitfest Bot committed Apr 26, 2025
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    4ac1278 View commit details
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