postgres-github.git / summary / log / commit / refs

commit    98979578055ffba3bd520adcec00881f72fc2861
Author:   Michael Paquier <michael@paquier.xyz>
Date:     Mon Apr 06 23:24:32 2026 +0000

    Fix shared memory size of template code for custom fixed-sized pgstats
    
    On HEAD, the template code for custom fixed-sized pgstats is in the test
    module test_custom_stats.  On REL_18_STABLE, this code lives in the test
    module injection_points.
    
    Both cases were underestimating the size of the shared memory area
    required for the storage of the stats data, using a single entry rather
    than the whole area.  This underestimation meant that there was no
    memory allocated for the LWLock required for the stats, and even more.
    This problem would be also misleading for extension developers looking
    at this code.
    
    This issue has been noticed while digging into a different bug reported
    by Heikki Linnakangas, showing that the underestimation was causing
    failures in the TAP tests of the test modules for 32-bit builds.  The
    other issue reported, related to the memory allocation of custom
    fixed-sized pgstats, will be fixed in a follow-up commit.
    
    Discussion: https://postgr.es/m/adMk_lWbnz3HDOA8@paquier.xyz
    Backpatch-through: 18

[parent: dd78e69cfc33]