Koichi Suzuki escribió: > Hi, > > Does anyone know how to generate the following WAL records from psql? > > I'm now fixing pg_lesslog, which I reported a bug. Now code is > almost okay and I'd like to add test tools to show pg_lesslog can > handle all the WAL record correctly. > > XLOG_MULTIXACT_ZERO_OFF_PAGE > XLOG_MULTIXACT_ZERO_MEM_PAGE > XLOG_MULTIXACT_CREATE_ID
For these, you need to do SELECT FOR SHARE of a tuple in more than one concurrent session. I think HEAP_LOCK is SELECT FOR UPDATE. > XLOG_BTREE_DELETE_PAGE > XLOG_BTREE_DELETE_PAGE_META > XLOG_BTREE_DELETE_PAGE_HALF These are caused during vacuum of a btree. Create an index, populate it, then remove all items. Then vacuum twice. -- Alvaro Herrera http://www.CommandPrompt.com/ PostgreSQL Replication, Consulting, Custom Development, 24x7 support -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
