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authorRobert Haas2025-06-06 12:18:22 +0000
committerRobert Haas2025-06-06 12:18:22 +0000
commitd59ff3be24a336ab080c66fa6ceafbf52e7be1c1 (patch)
tree923e84830c12a827a8975129f95082a082d70961
parent74637fb797778e7ee1111c6f0c40f95680d21768 (diff)
pg_prewarm: Allow autoprewarm to use more than 1GB to dump blocks.
Reported-by: Daria Shanina <[email protected]> Author: Daria Shanina <[email protected]> Author: Robert Haas <[email protected]> Backpatch-through: 13
-rw-r--r--contrib/pg_prewarm/autoprewarm.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/contrib/pg_prewarm/autoprewarm.c b/contrib/pg_prewarm/autoprewarm.c
index c0c4f5d9ca7..c308286f94d 100644
--- a/contrib/pg_prewarm/autoprewarm.c
+++ b/contrib/pg_prewarm/autoprewarm.c
@@ -609,8 +609,15 @@ apw_dump_now(bool is_bgworker, bool dump_unlogged)
return 0;
}
- block_info_array =
- (BlockInfoRecord *) palloc(sizeof(BlockInfoRecord) * NBuffers);
+ /*
+ * With sufficiently large shared_buffers, allocation will exceed 1GB, so
+ * allow for a huge allocation to prevent outright failure.
+ *
+ * (In the future, it might be a good idea to redesign this to use a more
+ * memory-efficient data structure.)
+ */
+ block_info_array = (BlockInfoRecord *)
+ palloc_extended((sizeof(BlockInfoRecord) * NBuffers), MCXT_ALLOC_HUGE);
for (num_blocks = 0, i = 0; i < NBuffers; i++)
{