Fix memory leak and inefficiency in CREATE DATABASE ... STRATEGY WAL_LOG
RelationCopyStorageUsingBuffer() did not free the strategies used to access
the source / target relation. They memory was released at the end of the
transaction, but when using a template database with a lot of relations, the
temporary leak can become big prohibitively big.
RelationCopyStorageUsingBuffer() acquired the buffer for the target relation
with RBM_NORMAL, therefore requiring a read of a block guaranteed to be
zero. Use RBM_ZERO_AND_LOCK instead.
Reviewed-by: Robert Haas <robertmhaas@gmail.com>
Discussion: https://postgr.es/m/20230321070113.o2vqqxogjykwgfrr@awork3.anarazel.de
Backpatch: 15-, where STRATEGY WAL_LOG was introduced
Branch
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REL_15_STABLE
Details
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https://git.postgresql.org/pg/commitdiff/560bb56c6eba5da7917e67783d46f0d5ca30e89a
Modified Files
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src/backend/storage/buffer/bufmgr.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
