diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/backend/replication/logical/reorderbuffer.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/src/backend/replication/logical/reorderbuffer.c b/src/backend/replication/logical/reorderbuffer.c index 264c253a878..64d9baa7982 100644 --- a/src/backend/replication/logical/reorderbuffer.c +++ b/src/backend/replication/logical/reorderbuffer.c @@ -328,9 +328,17 @@ ReorderBufferAllocate(void) SLAB_DEFAULT_BLOCK_SIZE, sizeof(ReorderBufferTXN)); + /* + * To minimize memory fragmentation caused by long-running transactions + * with changes spanning multiple memory blocks, we use a single + * fixed-size memory block for decoded tuple storage. The performance + * testing showed that the default memory block size maintains logical + * decoding performance without causing fragmentation due to concurrent + * transactions. + */ buffer->tup_context = GenerationContextCreate(new_ctx, "Tuples", - SLAB_LARGE_BLOCK_SIZE); + SLAB_DEFAULT_BLOCK_SIZE); hash_ctl.keysize = sizeof(TransactionId); hash_ctl.entrysize = sizeof(ReorderBufferTXNByIdEnt); |