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authorAlexander Korotkov2025-07-27 12:10:01 +0000
committerAlexander Korotkov2025-07-27 12:10:02 +0000
commitbae50782170c9de8aa13700423923a5bb9d6b9e9 (patch)
tree5ea0341658ee3df7b9feddbf081a4de67198f502 /HISTORY
parent75f633f54aaae4d20ea0ade9a953afa73e3a66e8 (diff)
Limit checkpointer requests queue sizeREL_18_STABLE
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. This commit limits the checkpointer requests queue size to 10M items. In addition to preventing the palloc() failure, this change helps to avoid long queue processing time. Also, this commit is for backpathing only. The master branch receives a more invasive yet comprehensive fix for this problem. Discussion: https://postgr.es/m/db4534f83a22a29ab5ee2566ad86ca92%40postgrespro.ru Backpatch-through: 13
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