Hello all,
I have a problem with growing WAL-files populating a temporary table.
After running the following script 8192 times (each in separate connection)
I can see 3*16 MB WAL files.
CREATE TEMP TABLE IF NOT EXISTS positiontemporarytable (pos_instrument_id
> integer, pos_code varchar(40));
> BEGIN TRANSACTION ISOLATION LEVEL SERIALIZABLE;
> prepare pos_insert (integer, varchar(40)) as insert into
> "positiontemporarytable" values($1, $2);
> execute pos_insert ('76','27958');
> execute pos_insert ('71','9406:58');
>
......
<about 8000 same 'executes' commands>
>
......
execute pos_insert ('74','19406:58');
COMMIT;
It was tested via pgbench:
> pgbench -l -t 8192 -C -f /db/postgres/report_test.sql db_test
and simple bash script:
> for i in {1..8192}
> do
> echo $i
> psql -f /db/postgres/report_test.sql db_test
> done
Results are the same. Server version 9.3.5 (it seems 9.2.4 and 9.2.9 also
affected by this).
As metioned, for example, in Robert Haas blog
http://rhaas.blogspot.ru/2010/05/global-temporary-and-unlogged-tables.html
> 3. They are not WAL-logged.
Whats wrong with it in my case?
--
Regards, Andrey Lizenko
