Move I/O before the index_update_stats() buffer lock region. Commit a07e03fd8fa7daf4d1356f7cb501ffe784ea6257 enlarged the work done here under the pg_class heap buffer lock. Two preexisting actions are best done before holding that lock. Both RelationGetNumberOfBlocks() and visibilitymap_count() do I/O, and the latter might exclusive-lock a visibility map buffer. Moving these reduces contention and risk of undetected LWLock deadlock. Back-patch to v12, like that commit.
Discussion: https://postgr.es/m/20241031200139...@rfd.leadboat.com Branch ------ REL_17_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/0bcb9d07940c790912b0aff781ef605ec22e1a2d Modified Files -------------- src/backend/catalog/index.c | 62 +++++++++++++++++++++++++++++---------------- 1 file changed, 40 insertions(+), 22 deletions(-)
