pg.ddx.io  pgsql-performance@postgresql.org mailing list archive  

help / color / mirror / Atom feed
From: Linos <info@linos.es>
To: Tom Lane <tgl@sss.pgh.pa.us>
To: Ross J. Reedstrom <reedstrm@rice.edu>
To: pgsql-performance@postgresql.org
Subject: Re: TCP network cost
Date: Sun, 01 Mar 2009 19:19:59 +0100
Message-ID: <49AAD1CF.6000908@linos.es> (raw)
In-Reply-To: <13505.1235931000@sss.pgh.pa.us>
References: <1ca1c1410902171013q478f2620n13fcd68cb8b3d911@mail.gmail.com>
	<20090217070403.GB2486@cooker>
	<3FAF940B-9B0B-4DBA-8728-6096022129DF@infogears.com>
	<alpine.DEB.1.10.0902170032440.25606@asgard.lang.hm>
	<20090217070403.GB2486@cooker>
	<3FAF940B-9B0B-4DBA-8728-6096022129DF@infogears.com>
	<20090217200416.GA23707@cooker>
	<87hc2r272g.fsf@oxford.xeocode.com>
	<20090223194212.GA14802@cooker>
	<27042.1235423820@sss.pgh.pa.us>
	<20090224170201.GA25420@cooker>
	<49AAC6AC.60309@linos.es>
	<13121.1235929398@sss.pgh.pa.us>
	<49AACC6F.7080809@linos.es>
	<13505.1235931000@sss.pgh.pa.us>

Tom Lane escribió:
> Linos <info@linos.es> writes:
>> Tom Lane escribió:
>>> Does that number include connection startup overhead?  (If it doesn't,
>>> it'd be pretty strange.)
> 
>> This difference it is from the runtime of the query, i get this with \timing 
>> parameter in psql,
> 
> That's just weird --- ssl off should be ssl off no matter which knob you
> use to turn it off.  Are you sure it's really off in the slow connections?
> 
> 			regards, tom lane

Maybe i am missing something, i use the same command to connect to it from 
localhost "psql -d database -h localhost" and in the pcap files i have captured 
the protocol it is clear (with "ssl = false" or "ssl = true" either), but in the 
debian machine with "ssl = true" in postgresql.conf you can see in the pcap file 
big time jumps between data packets, psql commandline enables automatically ssl 
if the server supports it? but if this is the case i should see encrypted 
traffic in pcap files, and the problem should be the same in Arch Linux, no? If 
you want that i make a local test explain me the steps and i will try here.

Regards,
Miguel Angel.



view thread (23+ messages)  latest in thread

Message-ID: <49AAD1CF.6000908@linos.es>
Permalink:  ../49AAD1CF.6000908@linos.es/
Also on:    postgresql.org/message-id/49AAD1CF.6000908@linos.es

 · 

reply
Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Reply to all the recipients using the --to and --cc options:
  reply via email

  To: pgsql-performance@postgresql.org
  Cc: info@linos.es, tgl@sss.pgh.pa.us, reedstrm@rice.edu
  Subject: Re: TCP network cost
  In-Reply-To: <49AAD1CF.6000908@linos.es>

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox