How to generate specific WAL records again for PostgreSQL 9.0?

Hi,

I've ported pg_lesslog to PostgreSQL 9.0 and I'm testing it.

I'm not successful to produce the following WAL records.

XLOG_HEAP_INIT_PAGE
XLOG_BTREE_REUSE_PAGE
XLOG_GIST_PAGE_DELETE
XLOG_RELMAP_UPDATE

Any suggestions are welcome.

Thank you very much;
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Koichi Suzuki