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Posted
Need help understanding optimizer behavior in 5.6  
1,341
Aaron Craven
06/22/2015 08:30AM
Re: Need help understanding optimizer behavior in 5.6  
682
Aaron Craven
06/22/2015 08:31AM
Re: Need help understanding optimizer behavior in 5.6  
607
Rick James
06/23/2015 07:00PM
Re: Need help understanding optimizer behavior in 5.6  
598
Aaron Craven
06/24/2015 06:22AM
Re: Need help understanding optimizer behavior in 5.6  
588
Rick James
06/25/2015 11:37PM
Re: Need help understanding optimizer behavior in 5.6  
593
Aaron Craven
06/26/2015 06:56AM
Re: Need help understanding optimizer behavior in 5.6  
585
Øystein Grøvlen
06/30/2015 05:46AM
Re: Need help understanding optimizer behavior in 5.6  
843
Aaron Craven
06/30/2015 08:06AM
Re: Need help understanding optimizer behavior in 5.6  
604
Aaron Craven
06/30/2015 08:16AM
Re: Need help understanding optimizer behavior in 5.6  
611
Øystein Grøvlen
07/01/2015 03:49AM
Re: Need help understanding optimizer behavior in 5.6  
589
Aaron Craven
07/01/2015 06:48AM
Re: Need help understanding optimizer behavior in 5.6  
638
Edwin Desouza
07/01/2015 03:05PM
Re: Need help understanding optimizer behavior in 5.6  
609
Aaron Craven
07/02/2015 07:48AM
MySQL 5.7: Optimizer Trace and EXPLAIN FORMAT=JSON  
1,342
Edwin Desouza
05/25/2015 10:41AM
foreign key creation in a huge database  
1,377
Raffael Vendrametto
03/05/2015 04:05PM
Please do NOT duplicate posts  
703
Peter Brawley
03/05/2015 05:42PM
Query Taking 2.5hrs on 5.6.20 version  
1,615
ch srinivas
03/04/2015 01:30AM
Re: Query Taking 2.5hrs on 5.6.20 version  
747
Peter Brawley
03/04/2015 12:15PM
Re: Query Taking 2.5hrs on 5.6.20 version  
685
Rick James
03/04/2015 08:18PM
Query optimisation advice  
1,588
Paul Feely
01/08/2015 11:02PM
Re: Query optimisation advice  
842
Rick James
01/10/2015 01:22AM
Re: Query optimisation advice  
804
Paul Feely
01/11/2015 05:50PM
Re: Query optimisation advice  
772
Rick James
01/12/2015 10:35PM
actual Size calculation of mysql table (engine innodb)  
1,557
Afaque Ahmad Siddiqui
12/10/2014 09:38AM
Re: actual Size calculation of mysql table (engine innodb)  
782
Rick James
12/12/2014 08:32PM
Re: actual Size calculation of mysql table (engine innodb)  
812
Rick James
12/12/2014 08:36PM
MySQL cash optimization  
1,714
Sasha Katsman
11/27/2014 06:33AM
Re: MySQL cash optimization  
938
Peter Brawley
11/27/2014 04:34PM
Re: MySQL cash optimization  
721
Sasha Katsman
12/09/2014 04:33AM
Re: MySQL cache optimization  
719
Peter Brawley
12/09/2014 12:28PM
how to tune for optimizer_search_depth?  
1,607
jongse park
12/03/2014 12:13AM
Re: how to tune for optimizer_search_depth?  
959
Rick James
12/03/2014 11:33PM
Re: how to tune for optimizer_search_depth?  
942
Øystein Grøvlen
12/08/2014 05:32AM
MySQL Optimizer Cost Model  
1,552
Edwin Desouza
10/24/2014 10:37AM
Need help to create index on join statments  
1,657
Neil Sorathia
10/08/2014 06:24PM
Re: Need help to create index on join statments  
789
Neil Sorathia
10/09/2014 09:46AM
Re: Need help to create index on join statments  
823
Rick James
10/11/2014 01:37PM
Better Performance for JOINs Not Using Indexes  
1,510
Edwin Desouza
10/03/2014 01:48PM
A Multi-Table Trick to Speed up Single-Table UPDATE/DELETE Statements  
1,671
Edwin Desouza
10/03/2014 01:47PM
MySQL 5.7: Optimizer Hints + Query Rewrite  
1,611
Edwin Desouza
10/01/2014 08:53AM
Intermediate Query Results  
1,978
Ashwini Singh
09/12/2014 08:37AM
Re: Intermediate Query Results  
913
Rick James
09/13/2014 09:23PM
Re: Intermediate Query Results  
1,088
Øystein Grøvlen
09/15/2014 05:42AM
All records scanning using "LIKe" and "IN" operaters  
1,758
ch srinivas
06/28/2014 01:43PM
Re: All records scanning using "LIKe" and "IN" operaters  
884
Peter Brawley
06/28/2014 02:22PM
Re: All records scanning using "LIKe" and "IN" operaters  
815
Øystein Grøvlen
08/28/2014 03:47PM
Help me to optimize my sql query  
1,537
GAURAV JAIN
08/21/2014 07:29AM
Re: Help me to optimize my sql query  
810
Rick James
08/22/2014 06:50AM
How could this SQL be optimized?  
1,782
feng guo
05/29/2014 11:26PM
Re: How could this SQL be optimized?  
889
Øystein Grøvlen
05/30/2014 02:41AM
Re: How could this SQL be optimized?  
954
feng guo
05/30/2014 02:46AM
Re: How could this SQL be optimized?  
777
Marion Gordon
08/21/2014 11:03PM
Re: How could this SQL be optimized?  
766
Øystein Grøvlen
08/22/2014 01:54AM
simple uses of order by datetime keep causing 'using filesort'  
1,760
park albert
08/19/2014 05:44PM
Re: simple uses of order by datetime keep causing 'using filesort'  
920
Rick James
08/20/2014 07:34PM
Expland and slow-query don't agree  
1,512
Aram Mirzadeh
08/03/2014 06:24AM
Re: Expland and slow-query don't agree  
769
Rick James
08/04/2014 01:23PM
Query not using index sporadically  
1,863
Vinay NP
06/13/2014 07:51AM
Re: Query not using index sporadically  
880
Rick James
06/18/2014 02:48PM
[HELP] Subquery Optimization  
1,768
Pinoy Central
05/28/2014 08:56PM
MySQL 5.7: Re-factoring internals of Prepared Statements  
1,424
Edwin Desouza
05/15/2014 12:29PM
BETWEEN a DATE and a hard place  
1,697
Gerald Bayles
04/16/2014 02:07PM
Re: BETWEEN a DATE and a hard place  
843
Rick James
04/18/2014 05:19PM
Re: BETWEEN a DATE and a hard place  
890
Gerald Bayles
04/21/2014 08:36AM
Re: BETWEEN a DATE and a hard place  
908
Rick James
04/24/2014 08:20PM
Re: BETWEEN a DATE and a hard place  
1,020
Gerald Bayles
04/25/2014 06:36AM
Re: BETWEEN a DATE and a hard place  
825
Rick James
04/26/2014 05:46AM
Re: BETWEEN a DATE and a hard place  
859
Gerald Bayles
04/28/2014 07:27AM
Re: BETWEEN a DATE and a hard place  
892
Gerald Bayles
05/01/2014 09:41AM
Re: BETWEEN a DATE and a hard place  
944
Rick James
05/02/2014 11:39AM
MySQL Optimizer: Features in MySQL 5.7  
1,466
Edwin Desouza
04/22/2014 10:03AM
Access mysql blob data from stored procedure  
2,104
Kalpesh g
04/15/2014 04:38AM
Re: Access mysql blob data from stored procedure  
891
Peter Brawley
04/15/2014 11:14AM
PARTITION table ADD INDEX ERROR 1041 (HY000) Out of memory  
2,274
Andre Mikulec
03/05/2014 05:38PM
Re: PARTITION table ADD INDEX ERROR 1041 (HY000) Out of memory  
1,092
Rick James
03/06/2014 11:21PM
Re: PARTITION table ADD INDEX ERROR 1041 (HY000) Out of memory  
1,014
Rick James
03/06/2014 11:23PM
Explain estimate completely wrong for range when partitioned by day  
2,500
Blake Harps
02/13/2014 01:23PM
Re: Explain estimate completely wrong for range when partitioned by day  
988
Øystein Grøvlen
02/14/2014 01:29AM
Re: Explain estimate completely wrong for range when partitioned by day  
1,104
Mattias Jonsson
02/14/2014 09:44AM
Re: Explain estimate completely wrong for range when partitioned by day  
1,036
Blake Harps
02/14/2014 03:07PM
Re: Explain estimate completely wrong for range when partitioned by day  
985
Blake Harps
02/14/2014 02:58PM
Re: Explain estimate completely wrong for range when partitioned by day  
969
Edwin Desouza
02/15/2014 12:39PM
Re: Explain estimate completely wrong for range when partitioned by day  
1,026
Rick James
02/15/2014 12:42PM
Re: Explain estimate completely wrong for range when partitioned by day  
998
Blake Harps
03/04/2014 12:27PM
Re: Explain estimate completely wrong for range when partitioned by day  
1,074
Mattias Jonsson
02/17/2014 04:29PM
Subquery with range uses filesort  
2,792
David Marcus
11/16/2013 02:42PM
Re: Subquery with range uses filesort  
1,122
Rick James
11/17/2013 07:42PM
Re: Subquery with range uses filesort  
1,061
David Marcus
11/17/2013 08:01PM
Re: Subquery with range uses filesort  
1,068
Rick James
11/18/2013 04:33PM
Re: Subquery with range uses filesort  
1,527
David Marcus
11/18/2013 07:54PM
Re: Subquery with range uses filesort  
1,153
Rick James
11/19/2013 04:10PM
Re: Subquery with range uses filesort  
1,158
David Marcus
11/19/2013 08:36PM
Re: Subquery with range uses filesort  
1,223
Rick James
11/21/2013 02:55PM
Re: Subquery with range uses filesort  
1,414
David Marcus
12/05/2013 03:46PM
Re: Subquery with range uses filesort  
1,041
Rick James
12/07/2013 02:10PM
Re: Subquery with range uses filesort  
1,068
David Marcus
12/09/2013 06:08PM
Re: Subquery with range uses filesort  
1,080
David Marcus
12/14/2013 09:51PM
Re: Subquery with range uses filesort  
1,040
David Marcus
12/14/2013 10:17PM
Re: Subquery with range uses filesort  
1,123
Rick James
12/15/2013 11:29PM
Re: Subquery with range uses filesort  
1,134
David Marcus
12/17/2013 06:58PM
Re: Subquery with range uses filesort  
1,052
Rick James
12/18/2013 05:49PM
Re: Subquery with range uses filesort  
1,081
David Marcus
12/18/2013 08:28PM
Re: Subquery with range uses filesort  
1,146
Rick James
12/19/2013 10:13PM
Re: Subquery with range uses filesort  
1,087
David Marcus
12/19/2013 10:28PM
Re: Subquery with range uses filesort  
998
Rick James
12/20/2013 07:06PM
Re: Subquery with range uses filesort  
1,083
David Marcus
12/21/2013 07:36AM
Re: Subquery with range uses filesort  
1,109
Rick James
12/22/2013 10:01AM
Re: Subquery with range uses filesort  
1,165
David Marcus
12/22/2013 10:45AM
Re: Subquery with range uses filesort  
1,028
David Marcus
12/25/2013 09:30PM
Optimizer executes inperformant subquery first  
2,496
Martin Kirchner
12/06/2013 07:12AM
Re: Optimizer executes inperformant subquery first  
992
Rick James
12/07/2013 02:30PM
Re: Optimizer executes inperformant subquery first  
1,257
Martin Kirchner
12/07/2013 03:49PM
Re: Optimizer executes inperformant subquery first  
1,396
Øystein Grøvlen
12/09/2013 09:48AM
Re: Optimizer executes inperformant subquery first  
1,117
Martin Kirchner
12/18/2013 03:04AM
Re: Optimizer executes inperformant subquery first  
1,119
Øystein Grøvlen
12/19/2013 02:45AM
Re: Optimizer executes inperformant subquery first  
992
Martin Kirchner
12/20/2013 02:24AM
Re: Optimizer executes inperformant subquery first  
969
Øystein Grøvlen
12/23/2013 08:07AM
Re: Optimizer executes inperformant subquery first  
1,005
Rick James
12/23/2013 01:11PM
Re: Optimizer executes inperformant subquery first  
1,117
Martin Kirchner
12/18/2013 05:16AM
Re: Optimizer executes inperformant subquery first  
1,094
Rick James
12/18/2013 06:49PM
Re: Optimizer executes inperformant subquery first  
1,034
Øystein Grøvlen
12/19/2013 02:49AM
my.cnf  
1,902
Juan Medina
10/27/2013 02:08PM
Re: my.cnf  
937
Rick James
10/29/2013 07:12PM
my.cnf optimization please help  
2,750
Ivan Kratunkov
10/28/2013 03:39AM
Re: my.cnf optimization please help  
1,053
Rick James
10/29/2013 07:10PM
MySQL Optimizer: Features in MySQL 5.7  
1,572
Edwin Desouza
10/18/2013 09:33AM
I need help in optimzing a order by clause in a join query  
1,766
George Maharis
10/08/2013 12:09PM
Re: I need help in optimzing a order by clause in a join query  
966
Rick James
10/10/2013 09:34PM
Re: I need help in optimzing a order by clause in a join query  
960
George Maharis
10/12/2013 02:07PM
Re: I need help in optimzing a order by clause in a join query  
958
Rick James
10/16/2013 08:36PM
MySQL My.cnf Config Help  
1,932
Mathieu Louis
10/03/2013 09:32PM
Very slow dependent subquery  
2,095
patrick canarelli
09/18/2013 03:06AM
Re: Very slow dependent subquery  
1,219
Øystein Grøvlen
09/18/2013 07:06AM
Re: Very slow dependent subquery  
1,100
patrick canarelli
09/18/2013 07:51AM
Re: Very slow dependent subquery  
1,119
Øystein Grøvlen
09/18/2013 02:57PM
Re: Very slow dependent subquery  
1,026
Peter Brawley
09/18/2013 02:13PM
Re: Very slow dependent subquery  
1,021
patrick canarelli
09/18/2013 03:10PM
Re: Very slow dependent subquery  
1,022
Rick James
09/24/2013 10:04PM
Re: Very slow dependent subquery  
1,229
patrick canarelli
09/25/2013 12:53AM
big database +1 million rows/days  
2,299
khaoula el hammoumi
09/11/2013 04:06AM
Re: big database +1 million rows/days  
1,006
khaoula el hammoumi
09/12/2013 01:37AM
Re: big database +1 million rows/days  
997
Rick James
09/13/2013 10:59PM
Optimize query join with 25,000 records  
1,859
Andrea Presazzi
08/26/2013 02:27AM
Re: Optimize query join with 25,000 records  
950
Rick James
08/31/2013 04:19PM
Index not used for JOIN on compound key plus WHERE range filter  
2,719
Chad B
08/15/2013 09:24AM
Re: Index not used for JOIN on compound key plus WHERE range filter  
1,264
Chad B
08/15/2013 10:44AM
Re: Index not used for JOIN on compound key plus WHERE range filter  
1,098
Rick James
08/31/2013 04:13PM
query index not used  
1,571
Adrian Petre
08/15/2013 05:23AM
Re: query index not used  
885
Rick James
08/31/2013 03:41PM
optimize request with order by and limit  
2,107
yassine laouija
07/18/2013 05:26AM
Re: optimize request with order by and limit  
1,158
Rick James
07/20/2013 10:25PM
Re: optimize request with order by and limit  
990
yassine laouija
07/22/2013 09:46AM
Re: optimize request with order by and limit  
898
Rick James
07/23/2013 08:58AM
Re: optimize request with order by and limit  
949
yassine laouija
07/26/2013 04:07AM
Re: optimize request with order by and limit  
976
Rick James
07/26/2013 11:53PM
Re: optimize request with order by and limit  
975
yassine laouija
07/29/2013 04:40AM
Re: optimize request with order by and limit  
970
Rick James
08/01/2013 10:39PM
providing a single line for multiple records from a table  
1,736
raja chacham
07/23/2013 09:56AM
Re: providing a single line for multiple records from a table  
851
Rick James
07/24/2013 09:08AM
Optimize Inner Join With WHERE BETWEEN dates  
2,831
Anthony Galano
05/21/2013 07:32PM
Re: Optimize Inner Join With WHERE BETWEEN dates  
1,290
Rick James
05/22/2013 06:41PM
Re: Optimize Inner Join With WHERE BETWEEN dates  
1,209
Anthony Galano
05/24/2013 12:40PM
Re: Optimize Inner Join With WHERE BETWEEN dates  
1,165
Rick James
05/25/2013 11:43AM
Re: Optimize Inner Join With WHERE BETWEEN dates  
1,049
Anthony Galano
05/30/2013 05:30PM
Re: Optimize Inner Join With WHERE BETWEEN dates  
1,109
Rick James
06/02/2013 01:15PM
Re: Optimize Inner Join With WHERE BETWEEN dates  
1,169
Anthony Galano
06/03/2013 05:02PM
Re: Optimize Inner Join With WHERE BETWEEN dates  
2,150
Rick James
06/04/2013 11:49PM
Query optimization  
2,165
Jan Kowalski
05/10/2013 05:35AM
Re: Query optimization  
1,087
Rick James
05/12/2013 08:42PM
Re: Query optimization  
1,036
Jan Kowalski
05/15/2013 06:45AM
Re: Query optimization  
1,030
Jan Kowalski
05/15/2013 08:35AM
Re: Query optimization  
1,082
Rick James
05/16/2013 08:18AM
Re: Query optimization  
1,021
Jan Kowalski
05/17/2013 03:52AM
Re: Query optimization  
1,016
Rick James
05/17/2013 11:47PM
Re: Query optimization  
945
Jan Kowalski
05/21/2013 08:51AM
Re: Query optimization  
1,025
Jan Kowalski
05/22/2013 08:08AM
MySQL Optimizer: When is a Subquery Executed?  
1,602
Edwin Desouza
05/02/2013 10:05AM
Index optimized left join with group by  
2,525
Michal Kurgan
03/11/2013 05:41PM
Re: Index optimized left join with group by  
1,059
Øystein Grøvlen
03/12/2013 04:16AM
Select last row that is less than or equal to a date  
5,349
David Marcus
01/23/2013 06:35PM
Re: Select last row that is less than or equal to a date  
1,422
Rick James
01/24/2013 10:27PM
Re: Select last row that is less than or equal to a date  
1,417
David Marcus
01/26/2013 09:35AM
Re: Select last row that is less than or equal to a date  
1,254
Rick James
01/27/2013 10:19AM
Re: Select last row that is less than or equal to a date  
1,240
David Marcus
01/27/2013 12:00PM
Re: Select last row that is less than or equal to a date  
1,167
Rick James
01/29/2013 12:51AM
Re: Select last row that is less than or equal to a date  
1,141
David Marcus
01/29/2013 06:28PM
Re: Select last row that is less than or equal to a date  
1,575
Øystein Grøvlen
01/30/2013 04:50AM
Re: Select last row that is less than or equal to a date  
1,254
David Marcus
01/30/2013 05:50PM
Re: Select last row that is less than or equal to a date  
1,181
Øystein Grøvlen
02/01/2013 06:03AM
Re: Select last row that is less than or equal to a date  
1,249
David Marcus
02/02/2013 07:14AM
Re: Select last row that is less than or equal to a date  
1,220
Øystein Grøvlen
02/02/2013 01:49PM
Re: Select last row that is less than or equal to a date  
1,241
David Marcus
02/02/2013 02:25PM
Re: Select last row that is less than or equal to a date  
1,123
Øystein Grøvlen
02/03/2013 05:58AM
Re: Select last row that is less than or equal to a date  
1,175
David Marcus
02/03/2013 10:04AM
Re: Select last row that is less than or equal to a date  
1,236
Rick James
02/03/2013 10:43AM
Re: Select last row that is less than or equal to a date  
1,701
David Marcus
02/03/2013 12:33PM
Re: Select last row that is less than or equal to a date  
1,229
Rick James
02/03/2013 02:59PM
Re: Select last row that is less than or equal to a date  
1,272
David Marcus
02/03/2013 03:35PM
Re: Select last row that is less than or equal to a date  
1,261
Rick James
02/03/2013 04:02PM
Re: Select last row that is less than or equal to a date  
1,297
David Marcus
02/03/2013 04:15PM
Very slow query, help please  
2,192
Jaume Roca
01/29/2013 10:18AM
Re: Very slow query, help please  
1,173
Øystein Grøvlen
01/30/2013 05:12AM
Re: Very slow query, help please  
1,179
Rick James
01/30/2013 08:38AM
Re: Very slow query, help please  
1,265
Jaume Roca
01/30/2013 09:05AM
MySQL 5.6: IN Subqueries Are Optimized away  
1,708
Edwin Desouza
01/29/2013 01:08PM
CPU load very very high !!!!, Please assist !!  
6,747
Sayed Ali
01/22/2013 06:49AM
Re: CPU load very very high !!!!, Please assist !!  
2,382
Rick James
01/22/2013 11:32PM
New EXPLAIN Features in MySQL 5.6 – FORMAT=JSON actually adds more information!  
1,808
Edwin Desouza
01/22/2013 05:58PM
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