At Fri, 05 Mar 2021 16:51:17 +0900 (JST), Kyotaro Horiguchi <horikyota....@gmail.com> wrote in > The difference comes from the difference of shared_buffers. In the > "allows_streaming" case, PostgresNode::init() *reduces* the number > down to '1MB'(128 blocks) which leads to only 8 XLOGbuffers, which > will very soon be wrap-arounded, which leads to XLogWrite. > > When allows_streaming=0 case, the default size of shared_buffers is > 128MB (16384 blocks). WAL buffer (512) doesn't get wrap-arounded > during the test and no WAL buffer is written out in that case.
So I think we need to remove the shared_buffers setting for the allows_streamig case in PostgresNode.pm regards. -- Kyotaro Horiguchi NTT Open Source Software Center
