Обсуждение: BUG #12756: performance issues with xml-data

The following bug has been logged on the website:

Bug reference:      12756
Logged by:          Thomas Fischer
Email address:      fischer@transporeon.com
PostgreSQL version: 9.3.6
Operating system:   Debian
Description:

When I do a select * of a table with some xml-data (about 50 MB) in a
text-field it will take ages to get a result, because wireshark is
recognizing some kind of packet defragmentation, so these packets have will
be sent over and over again.
If you are not able to reproduce this behaviour I can give you some example
data.

With regards
Thomas

fischer@transporeon.com writes:
> When I do a select * of a table with some xml-data (about 50 MB) in a
> text-field it will take ages to get a result, because wireshark is
> recognizing some kind of packet defragmentation, so these packets have will
> be sent over and over again.

If that is actually what's happening, you need to file a bug against your
kernel; such behavior is far outside Postgres' control.

            regards, tom lane