Re: minio server. Was: Performance of ByteA: ascii vs binary

On 3/18/19 7:59 AM, Thomas Güttler wrote:
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> Am 18.03.19 um 15:49 schrieb Tom Lane:
>> Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)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.
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> Thank you for your fast reply.
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> 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?

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--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com