Solved

Slow speed in SQL Pervasive calls on certain router conditions

Posted on 2011-03-05
12
489 Views
Last Modified: 2012-06-22
I use Pervasive SQL (ODBC has Pervasive Engine loaded)
On certain locations (meaning different locations in the country,)  when connected on the router (by hub) it takes some 20 seconds before SQL  responds, if I disconnect network cable its fast!
0
Comment
Question by:BIAPRO
  • 8
  • 4
12 Comments
 
LVL 28

Expert Comment

by:Bill Bach
Comment Utility
Can we assume that the database is on the local system, with data on the local hard disk?
Otherwise, this makes little sense, as without the NIC cable, the call will fail.

Can you set yp Wireshark and get a network trace of the calls going out over the network?  I expect that you'll see a call going out that does not get a reply -- perhaps a DNS lookup, based on the time -- and if you know what is failing, you can figure out how to fix it.
0
 

Author Comment

by:BIAPRO
Comment Utility
Yes the database is local,  as I stated when not on the network conneted ist fast, i just have to disconnect every time my internet
will download wireshark and test it
0
 

Author Comment

by:BIAPRO
Comment Utility
when connected to the net and using a test call in the odbc to the database whiresharks generated the attached log.
my ip in this log is 192.168.1.36 for this workstation
the log itself does not (with my level of knowledge)  not tell me what makes the delay on the odbc / sql call

shark1.jpg
0
 

Author Comment

by:BIAPRO
Comment Utility
0
 

Author Comment

by:BIAPRO
Comment Utility
0
 
LVL 28

Accepted Solution

by:
Bill Bach earned 500 total points
Comment Utility
The problem seems to be the MDNS queries, which are issued, but no reply ever comes back.  Here's a starting point:
    http://laurachappell.blogspot.com/2009/06/iphone-youre-sexy-but-you-talk-too-much.html
But you can query mDNS in your favorite web search tool for more information.

These multi-cast DNS queries are being issued when you are connected to the network, but the system is waiting for a response.  You will probably find the system runs faster after you take some steps to disable it.
0
Highfive Gives IT Their Time Back

Highfive is so simple that setting up every meeting room takes just minutes and every employee will be able to start or join a call from any room with ease. Never be called into a meeting just to get it started again. This is how video conferencing should work!

 

Author Comment

by:BIAPRO
Comment Utility
hi Bill, it was searching and searching , I did discover 2 networkprinters wich were on usb anyway, so turned off their IP's, but more important to this problem I discovered this way that the pervasive engine was not only looking for Ms-TCP/IP mode but multi mode.
After turning all mode's off, and only left Ms-TCP/IP mode on did solve the problem
Thanks
0
 
LVL 28

Expert Comment

by:Bill Bach
Comment Utility
Can you post the exact steps you used to disable the other modes?  That will make this article a perfect reference for someone in the future.
0
 

Author Comment

by:BIAPRO
Comment Utility
this tab in pervasive settings

modes.jpg
0
 
LVL 28

Expert Comment

by:Bill Bach
Comment Utility
Wow!  I forgot all about those options from Pervasive.SQL 2000i!  In all of the newer engines, it is merely a checkbox for TCP.  I would guess, then, that you wouldn't have an issue with any of the newer engines.
0
 

Author Comment

by:BIAPRO
Comment Utility
I understand Bill,  but since I have a few (and coming) pervasive dos users (netware) in the process off stepping from total dos  tpo total windows (perv. v10 and up)  I must use 2000i since I was never able to get the Btrieve dos client working in Perv. v10+
and some programs are still not converted from dos to VB6 and can't miss them
0
 

Author Comment

by:BIAPRO
Comment Utility
this way I  can run on XP both VB6 and compiled dos on the same server
0

Featured Post

Maximize Your Threat Intelligence Reporting

Reporting is one of the most important and least talked about aspects of a world-class threat intelligence program. Here’s how to do it right.

Join & Write a Comment

This article describes some very basic things about SQL Server filegroups.
Shadow IT is coming out of the shadows as more businesses are choosing cloud-based applications. It is now a multi-cloud world for most organizations. Simultaneously, most businesses have yet to consolidate with one cloud provider or define an offic…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…

772 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

11 Experts available now in Live!

Get 1:1 Help Now