On 3/18/19 7:59 AM, Thomas Güttler wrote:


Am 18.03.19 um 15:49 schrieb Tom Lane:
Adrian Klaver <adrian.kla...@aklaver.com> writes:
On 3/18/19 7:33 AM, Thomas Güttler wrote:
If I used ascii data the tests took 52 seconds.
If I used random binary data the test took 250 seconds.

This doesn't seem terribly surprising in bytea_output = escape
mode.  Probably with bytea_output = hex the performance would
be less data-dependent.

Thank you for your fast reply.

I guess we will use a minio server to store the blobs.

According to this:

http://initd.org/psycopg/docs/usage.html?highlight=bytea#adapt-binary

psycopg2 will use 'hex' by default.

Have you tried the test outside Python/psycopg2 e.g in psql to see if the performance hit still exists?







--
Adrian Klaver
adrian.kla...@aklaver.com

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