Comments for DBMSguy.com http://dbmsguy.com/blog Practical advice for the practical DBA Sun, 08 Jan 2012 04:00:11 +0000 hourly 1 http://wordpress.org/?v=3.3.1 Comment on A few interesting sql tutorial sites I have found by tellen http://dbmsguy.com/blog/2009/05/a-few-interesting-sites-i-found/#comment-635 tellen Sun, 08 Jan 2012 04:00:11 +0000 http://dbmsguy.com/blog/?p=70#comment-635 Another good SQL tutorial is at http://www.1keydata.com/sql/sql.html Another good SQL tutorial is at http://www.1keydata.com/sql/sql.html

]]> Comment on DB2 LUW V9.7 CUR_COMMIT database configuration option – buyer beware by Henrik Loeser http://dbmsguy.com/blog/2011/01/cur_commit_db_option/#comment-533 Henrik Loeser Thu, 20 Jan 2011 10:37:47 +0000 http://dbmsguy.com/blog/?p=309#comment-533 Were there many number of log read IOs or just log pages read (logical, still in buffer)? Increasing the LOGBUFSZ is the recommended best practice when using currently committed because the log buffer is utilized to resolve conflicts. From my perspective it is efficient, but the question is regarding the application and the database design: What is the structure of your transactions? How much data needs to be logged (grouping of columns)? How do you lock/access data, in which order? I consider the new mode cur_commit one of many ways to deal with deadlocks. But it is only for the symptoms, not the real cause behind deadlocks. Henrik Were there many number of log read IOs or just log pages read (logical, still in buffer)? Increasing the LOGBUFSZ is the recommended best practice when using currently committed because the log buffer is utilized to resolve conflicts. From my perspective it is efficient, but the question is regarding the application and the database design: What is the structure of your transactions? How much data needs to be logged (grouping of columns)? How do you lock/access data, in which order?

I consider the new mode cur_commit one of many ways to deal with deadlocks. But it is only for the symptoms, not the real cause behind deadlocks.

Henrik

]]> Comment on db2 batch scripts – tips and tricks – part 2 by Stefan M. Mihokovic http://dbmsguy.com/blog/2010/08/db2-batch-scripts-tips-and-tricks-part-2/#comment-262 Stefan M. Mihokovic Sun, 05 Sep 2010 08:28:28 +0000 http://dbmsguy.com/blog/?p=155#comment-262 Or we do it in such a way: SELECT COUNT( * ) FROM OLD TABLE( DELETE FROM test); Regards Stefan Or we do it in such a way:

SELECT COUNT( * ) FROM OLD TABLE( DELETE FROM test);

Regards Stefan

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