MySQL Forums :: General :: Finding loop in indexes
Finding loop in indexes
Posted by: Seema Bhatia ()
Date: December 11, 2012 05:45PM
A simple query
Update Table1 set col1 = 12 where col2='13' which is taking long long time like 4 or more minutes even though table has less than 100 rows.
Memory consumption - 99%
CPU - 20%
However, table has so many joins with other tables, indexes, foreign keys, etc. All tables are so interrelated like x is connected to y and then y connected to z and then z comes back to x.
So how could I check that it is forming a loop while doing update or some lock problems.
Update Table1 set col1 = 12 where col2='13' which is taking long long time like 4 or more minutes even though table has less than 100 rows.
Memory consumption - 99%
CPU - 20%
However, table has so many joins with other tables, indexes, foreign keys, etc. All tables are so interrelated like x is connected to y and then y connected to z and then z comes back to x.
So how could I check that it is forming a loop while doing update or some lock problems.
| Subject | Written By | Posted |
|---|---|---|
| Finding loop in indexes | Seema Bhatia | 12/11/2012 05:45PM |
| Re: Finding loop in indexes | Rick James | 12/12/2012 09:47PM |
| Re: Finding loop in indexes | Seema Bhatia | 12/12/2012 11:21PM |
| Re: Finding loop in indexes | Shane Bester | 01/02/2013 01:15PM |
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