Re: GIN logging GIN_SEGMENT_UNMODIFIED actions?

Hi!

On Mon, May 9, 2016 at 10:46 PM, Andres Freund <andres(at)anarazel(dot)de> wrote:

> trying to debug something I saw the following in pg_xlogdump output:
>
> rmgr: Gin len (rec/tot): 0/ 274, tx: 0, lsn:
> 1C/DF28AEB0, prev 1C/DF289858, desc: VACUUM_DATA_LEAF_PAGE 3 segments: 5
> unknown action 0 ???, blkref #0: rel 1663/16384/16435 blk 310982
>
> note the "segments: 5 unknown action 0 ???" bit. That doesn't seem
> right, given:
> #define GIN_SEGMENT_UNMODIFIED 0 /* no action (not used in
> WAL records) */
>

I've checked GIN code. Have no idea of how such wal record could be
generated...
The only idea I have is to add check that we're inserting valid WAL record
immediately before XLogInsert().

------
Alexander Korotkov
Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company