Thomas: On Fri, Mar 22, 2019 at 11:22 AM Thomas Güttler <guettliml@xxxxxxxxxxxxxxxxxx> wrote: > Thank you for asking several times for a benchmark. > I wrote it now and it is visible: inserting random bytes into bytea is much slower, > if you use the psycopg2 defaults. > Here is the chart: > https://github.com/guettli/misc/blob/master/bench-bytea-inserts-postrgres.png > And here is the script which creates the chart: > https://github.com/guettli/misc/blob/master/bench-bytea-inserts-postrgres.py I'm not too sure, but I read ( in the code ) you are measuring a nearly not compressible urandom data againtst a highly compressible ( 'x'*i ) data, are you sure the difference is not due to data being compressed and generating much less disk usage in toast-tables/wal? Francisco Olarte.
