(2011/04/13 8:34), Tom Lane wrote:
> Greg Stark<gsstark@mit.edu> writes:
>> Doesn't pg_lesslog depend on this?
>
> One hopes not.
AFAIK it's safe because pg_lesslog removes full-page image only when it
has enough information for substitute incremental log.
For example of XLOG_HEAP_INSERT, pg_lesslog generates incremental logs
such as xl_heap_header and tuple image from the inserted tuple in the
full-page image, and replaces full-page image with them.
Regards,
--
Shigeru Hanada