Want to win a PS4? Go Premium and enter to win our High-Tech Treats giveaway. Enter to Win

x
?
Solved

Oracle - Db links

Posted on 2006-11-23
8
Medium Priority
?
2,240 Views
Last Modified: 2008-01-09
Hi,

I have many dblinks to various databases. Each hour one db job is running which
    uses these dblinks. But sometimes happens that some changes are made (e.g. IP
    address change) and then the dblink is unusable. But the job is hanging with
    "SQL*Net message from dblink" wait event for a very long time.
    Is there some possibility to set some "dblink timeout" or to simply check the
    dblink status before?


Thanks
0
Comment
Question by:expertblr
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
8 Comments
 
LVL 3

Expert Comment

by:cdemir
ID: 18006167
i think the easiest way : "select * from dual@link_db"
0
 
LVL 13

Expert Comment

by:anand_2000v
ID: 18008060
select * from dba_db_links:

you can view the no of db links in the database,
Incase any changes in the ip address,you have to change the tns entry to refer the new ipaddress.

Once you change the ip address and you din change the tns entry then the db link will get invalid and the job will be hanging
0
 

Author Comment

by:expertblr
ID: 18043193
Thanks for reply. Its perfectly clear to me that when some IP address of any
    server is changed then the dblink is unusable until the IP in tnsnames is
    changed as well. I've just wanted to ask you if is there any possibility to
    somehow handle this problem directly in plsql code. Now we are facing the
    problem, that something has chaged (IP....) but we don't know it immediatelly.
    We can only see after some time, that the session is hanging with wait for
    dblink and it's going to hang probably forever. So I would need only either to
    perform some quick functionality check of particular dblink in the beginning of
    the code or to set some "dblink timeout".

Thanks..
0
Free learning courses: Active Directory Deep Dive

Get a firm grasp on your IT environment when you learn Active Directory best practices with Veeam! Watch all, or choose any amount, of this three-part webinar series to improve your skills. From the basics to virtualization and backup, we got you covered.

 

Author Comment

by:expertblr
ID: 18051488
can anyone suggest an answer to this??? Please.....
0
 

Author Comment

by:expertblr
ID: 18106751
please help me out!!
0
 
LVL 13

Accepted Solution

by:
anand_2000v earned 1000 total points
ID: 18120345
in the tnsnames.ora use the machine name not the ipaddress.
0
 
LVL 1

Expert Comment

by:Computer101
ID: 20296243
Forced accept.

Computer101
EE Admin
0

Featured Post

VIDEO: THE CONCERTO CLOUD FOR HEALTHCARE

Modern healthcare requires a modern cloud. View this brief video to understand how the Concerto Cloud for Healthcare can help your organization.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Background In several of the companies I have worked for, I noticed that corporate reporting is off loaded from the production database and done mainly on a clone database which needs to be kept up to date daily by various means, be it a logical…
This post first appeared at Oracleinaction  (http://oracleinaction.com/undo-and-redo-in-oracle/)by Anju Garg (Myself). I  will demonstrate that undo for DML’s is stored both in undo tablespace and online redo logs. Then, we will analyze the reaso…
This video shows how to Export data from an Oracle database using the Original Export Utility.  The corresponding Import utility, which works the same way is referenced, but not demonstrated.
This video shows how to copy an entire tablespace from one database to another database using Transportable Tablespace functionality.

610 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