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Message Posted: Thu, 01 Nov 2012 @ 22:14:16 GMT


     
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Subj:   Re: Cnsrun with dumplocklog
 
From:   Clark, Dave

Juan-

Even in a production environment, you can test Locking Logger without impacting your users. Here's a simple example of how to test the impact of a Teradata Database lock:

An EXCLUSIVE lock or a HUT lock can block an ACCESS lock...

A simple test:

Setup:

create database testdb as perm=1000000;
Create table testdb.testtbl (c1 int);
Grant all on testdb.testtbl to user1, user2;

user1 issues: locking table testdb.testtbl in exclusive mode bt;

user2 issues: sel * from testdb.testtbl;

[wait 5-minutes]

user1 issues: et;


In this scenario user2 will wait until user1 issues an et;...

If no other console utilities are active, dumplocklog will run in "screen 1" on the control node. You can monitor the results of the run by issuing: "cnsterm 1" from a command prompt on this node. This will take you to "screen 1" and you can monitor the response to your "cnsrun" input. To exit, enter "break-key".


-dave.clark



     
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