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Commit8a50352

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pg_buffercache: Allow huge allocations.
Otherwise, users who have configured shared_buffers >= 256GB won'tbe able to use this module. There probably aren't many of those, butit doesn't hurt anything to fix it so that it works.Backpatch to 9.4, where MemoryContextAllocHuge was introduced. Thesame problem exists in older branches, but there's no easy way tofix it there.KaiGai Kohei
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‎contrib/pg_buffercache/pg_buffercache_pages.c

Lines changed: 3 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -124,7 +124,9 @@ pg_buffercache_pages(PG_FUNCTION_ARGS)
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fctx->tupdesc=BlessTupleDesc(tupledesc);
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/* Allocate NBuffers worth of BufferCachePagesRec records. */
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fctx->record= (BufferCachePagesRec*)palloc(sizeof(BufferCachePagesRec)*NBuffers);
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fctx->record= (BufferCachePagesRec*)
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MemoryContextAllocHuge(CurrentMemoryContext,
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sizeof(BufferCachePagesRec)*NBuffers);
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/* Set max calls and remember the user function context. */
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funcctx->max_calls=NBuffers;

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