Re: psql performance

I'm sshing into my redhat 8 server and running psql 7.4.7.

My client is fedora core 3. With konsole terminals I have the problem
but with xterm I don't.

I did a diff between the output of env of both of them and got:

-SSH_CLIENT=66.xxx.xxx.124 32943 22
-SSH_TTY=/dev/pts/5
+SSH_CLIENT=66.xxx.xxx.124 33110 22
+SSH_TTY=/dev/pts/6

(I sanatized my ip)

So the question what is the difference between konsole and xterm that is
causing cpu to be eating up on the server?

My ssh client:
[jks(at)jks-desktop ~]$ ssh -V
OpenSSH_3.9p1, OpenSSL 0.9.7a Feb 19 2003

server sshd:
sshd version OpenSSH_3.4p1

server:> rpm -qa | grep readline
readline-devel-4.3-3
readline-4.3-3

[jks(at)jks-desktop ~]$ rpm -qa | grep readline
readline-4.3-13
readline-devel-4.3-13

Tom Lane wrote:
> Joseph Shraibman <jks(at)selectacast(dot)net> writes:
>
>>It doesn't matter what the query is. The problem happens before it even
>>runs the query.
>
>
> Hmmm ... I see different misbehavior (psql seems to lock up entirely,
> it doesn't slow down or eat CPU). But it's still misbehavior.
>
> "psql -n" doesn't have a problem, which says that this is probably a
> readline bug rather than our own bug. I think it's probably context
> dependent too; I'm pretty sure I've pasted big queries into psql without
> a problem while working directly on my work machine, but right now I'm
> ssh'd into it from a laptop and I do see a problem.
>
> [ further experimentation... ] A local psql on the laptop doesn't
> show a problem either. Both this and the one on the work machine
> are 8.1devel using readline-4.2a, so it doesn't seem to be an issue
> of different software versions. Maybe readline doesn't like ssh?
>
> [ still further experimentation... ] No, because ssh'ing to my *other*
> work machine and running psql there doesn't show a problem either.
> Curiouser and curiouser. But it's clearly very context dependent.
>
> You should probably tell us *exactly* what you are running, in every bit
> of software between you and psql. My tests here are with (local) Mac OS
> X 10.3.8, Apple-supplied X server and xterm terminal, Apple-supplied ssh
> (seems to be 3.6.1p1), local psql is current PG sources + readline 4.2a.
> The remote that doesn't work nicely is HPUX 10.20, sshd is
> openssh-3.7.1p2, current psql sources, readline 4.2a. The remote that
> does work nicely is Fedora Core 3, sshd 3.9p1-8.0.1, current psql
> sources, readline 4.3-13. I'm not seeing a pattern ...
>
>
>>Incidentally when I did that I only got back one row. What's up with that?
>
>
> UNION eliminates duplicates.
>
> regards, tom lane
>
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