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Need help understanding optimizer behavior in 5.6  
1,644
Aaron Craven
06/22/2015 08:30AM
Re: Need help understanding optimizer behavior in 5.6  
826
Aaron Craven
06/22/2015 08:31AM
Re: Need help understanding optimizer behavior in 5.6  
793
Rick James
06/23/2015 07:00PM
Re: Need help understanding optimizer behavior in 5.6  
786
Aaron Craven
06/24/2015 06:22AM
Re: Need help understanding optimizer behavior in 5.6  
718
Rick James
06/25/2015 11:37PM
Re: Need help understanding optimizer behavior in 5.6  
740
Aaron Craven
06/26/2015 06:56AM
Re: Need help understanding optimizer behavior in 5.6  
759
Øystein Grøvlen
06/30/2015 05:46AM
Re: Need help understanding optimizer behavior in 5.6  
1,180
Aaron Craven
06/30/2015 08:06AM
Re: Need help understanding optimizer behavior in 5.6  
772
Aaron Craven
06/30/2015 08:16AM
Re: Need help understanding optimizer behavior in 5.6  
861
Øystein Grøvlen
07/01/2015 03:49AM
Re: Need help understanding optimizer behavior in 5.6  
887
Aaron Craven
07/01/2015 06:48AM
Re: Need help understanding optimizer behavior in 5.6  
809
Edwin Desouza
07/01/2015 03:05PM
Re: Need help understanding optimizer behavior in 5.6  
791
Aaron Craven
07/02/2015 07:48AM
MySQL 5.7: Optimizer Trace and EXPLAIN FORMAT=JSON  
1,634
Edwin Desouza
05/25/2015 10:41AM
foreign key creation in a huge database  
1,634
Raffael Vendrametto
03/05/2015 04:05PM
Please do NOT duplicate posts  
831
Peter Brawley
03/05/2015 05:42PM
Query Taking 2.5hrs on 5.6.20 version  
2,008
ch srinivas
03/04/2015 01:30AM
Re: Query Taking 2.5hrs on 5.6.20 version  
916
Peter Brawley
03/04/2015 12:15PM
Re: Query Taking 2.5hrs on 5.6.20 version  
852
Rick James
03/04/2015 08:18PM
Query optimisation advice  
1,875
Paul Feely
01/08/2015 11:02PM
Re: Query optimisation advice  
972
Rick James
01/10/2015 01:22AM
Re: Query optimisation advice  
908
Paul Feely
01/11/2015 05:50PM
Re: Query optimisation advice  
951
Rick James
01/12/2015 10:35PM
actual Size calculation of mysql table (engine innodb)  
1,798
Afaque Ahmad Siddiqui
12/10/2014 09:38AM
Re: actual Size calculation of mysql table (engine innodb)  
955
Rick James
12/12/2014 08:32PM
Re: actual Size calculation of mysql table (engine innodb)  
1,002
Rick James
12/12/2014 08:36PM
MySQL cash optimization  
1,982
Sasha Katsman
11/27/2014 06:33AM
Re: MySQL cash optimization  
1,185
Peter Brawley
11/27/2014 04:34PM
Re: MySQL cash optimization  
874
Sasha Katsman
12/09/2014 04:33AM
Re: MySQL cache optimization  
819
Peter Brawley
12/09/2014 12:28PM
how to tune for optimizer_search_depth?  
1,959
jongse park
12/03/2014 12:13AM
Re: how to tune for optimizer_search_depth?  
1,293
Rick James
12/03/2014 11:33PM
Re: how to tune for optimizer_search_depth?  
1,243
Øystein Grøvlen
12/08/2014 05:32AM
MySQL Optimizer Cost Model  
1,738
Edwin Desouza
10/24/2014 10:37AM
Need help to create index on join statments  
1,888
Neil Sorathia
10/08/2014 06:24PM
Re: Need help to create index on join statments  
892
Neil Sorathia
10/09/2014 09:46AM
Re: Need help to create index on join statments  
1,001
Rick James
10/11/2014 01:37PM
Better Performance for JOINs Not Using Indexes  
1,633
Edwin Desouza
10/03/2014 01:48PM
A Multi-Table Trick to Speed up Single-Table UPDATE/DELETE Statements  
1,870
Edwin Desouza
10/03/2014 01:47PM
MySQL 5.7: Optimizer Hints + Query Rewrite  
1,820
Edwin Desouza
10/01/2014 08:53AM
Intermediate Query Results  
2,600
Ashwini Singh
09/12/2014 08:37AM
Re: Intermediate Query Results  
1,268
Rick James
09/13/2014 09:23PM
Re: Intermediate Query Results  
1,306
Øystein Grøvlen
09/15/2014 05:42AM
All records scanning using "LIKe" and "IN" operaters  
2,101
ch srinivas
06/28/2014 01:43PM
Re: All records scanning using "LIKe" and "IN" operaters  
1,040
Peter Brawley
06/28/2014 02:22PM
Re: All records scanning using "LIKe" and "IN" operaters  
989
Øystein Grøvlen
08/28/2014 03:47PM
Help me to optimize my sql query  
1,965
GAURAV JAIN
08/21/2014 07:29AM
Re: Help me to optimize my sql query  
981
Rick James
08/22/2014 06:50AM
How could this SQL be optimized?  
2,013
feng guo
05/29/2014 11:26PM
Re: How could this SQL be optimized?  
1,001
Øystein Grøvlen
05/30/2014 02:41AM
Re: How could this SQL be optimized?  
1,077
feng guo
05/30/2014 02:46AM
Re: How could this SQL be optimized?  
928
Marion Gordon
08/21/2014 11:03PM
Re: How could this SQL be optimized?  
949
Øystein Grøvlen
08/22/2014 01:54AM
simple uses of order by datetime keep causing 'using filesort'  
2,041
park albert
08/19/2014 05:44PM
Re: simple uses of order by datetime keep causing 'using filesort'  
1,101
Rick James
08/20/2014 07:34PM
Expland and slow-query don't agree  
1,766
Aram Mirzadeh
08/03/2014 06:24AM
Re: Expland and slow-query don't agree  
875
Rick James
08/04/2014 01:23PM
Query not using index sporadically  
2,118
Vinay NP
06/13/2014 07:51AM
Re: Query not using index sporadically  
975
Rick James
06/18/2014 02:48PM
[HELP] Subquery Optimization  
2,024
Pinoy Central
05/28/2014 08:56PM
MySQL 5.7: Re-factoring internals of Prepared Statements  
1,569
Edwin Desouza
05/15/2014 12:29PM
BETWEEN a DATE and a hard place  
1,861
Gerald Bayles
04/16/2014 02:07PM
Re: BETWEEN a DATE and a hard place  
953
Rick James
04/18/2014 05:19PM
Re: BETWEEN a DATE and a hard place  
1,016
Gerald Bayles
04/21/2014 08:36AM
Re: BETWEEN a DATE and a hard place  
1,003
Rick James
04/24/2014 08:20PM
Re: BETWEEN a DATE and a hard place  
1,140
Gerald Bayles
04/25/2014 06:36AM
Re: BETWEEN a DATE and a hard place  
944
Rick James
04/26/2014 05:46AM
Re: BETWEEN a DATE and a hard place  
982
Gerald Bayles
04/28/2014 07:27AM
Re: BETWEEN a DATE and a hard place  
1,034
Gerald Bayles
05/01/2014 09:41AM
Re: BETWEEN a DATE and a hard place  
1,087
Rick James
05/02/2014 11:39AM
MySQL Optimizer: Features in MySQL 5.7  
1,648
Edwin Desouza
04/22/2014 10:03AM
Access mysql blob data from stored procedure  
2,569
Kalpesh g
04/15/2014 04:38AM
Re: Access mysql blob data from stored procedure  
1,082
Peter Brawley
04/15/2014 11:14AM
PARTITION table ADD INDEX ERROR 1041 (HY000) Out of memory  
2,858
Andre Mikulec
03/05/2014 05:38PM
Re: PARTITION table ADD INDEX ERROR 1041 (HY000) Out of memory  
1,303
Rick James
03/06/2014 11:21PM
Re: PARTITION table ADD INDEX ERROR 1041 (HY000) Out of memory  
1,207
Rick James
03/06/2014 11:23PM
Explain estimate completely wrong for range when partitioned by day  
2,915
Blake Harps
02/13/2014 01:23PM
Re: Explain estimate completely wrong for range when partitioned by day  
1,200
Øystein Grøvlen
02/14/2014 01:29AM
Re: Explain estimate completely wrong for range when partitioned by day  
1,273
Mattias Jonsson
02/14/2014 09:44AM
Re: Explain estimate completely wrong for range when partitioned by day  
1,245
Blake Harps
02/14/2014 03:07PM
Re: Explain estimate completely wrong for range when partitioned by day  
1,169
Blake Harps
02/14/2014 02:58PM
Re: Explain estimate completely wrong for range when partitioned by day  
1,085
Edwin Desouza
02/15/2014 12:39PM
Re: Explain estimate completely wrong for range when partitioned by day  
1,165
Rick James
02/15/2014 12:42PM
Re: Explain estimate completely wrong for range when partitioned by day  
1,138
Blake Harps
03/04/2014 12:27PM
Re: Explain estimate completely wrong for range when partitioned by day  
1,229
Mattias Jonsson
02/17/2014 04:29PM
Subquery with range uses filesort  
3,345
David Marcus
11/16/2013 02:42PM
Re: Subquery with range uses filesort  
1,263
Rick James
11/17/2013 07:42PM
Re: Subquery with range uses filesort  
1,249
David Marcus
11/17/2013 08:01PM
Re: Subquery with range uses filesort  
1,224
Rick James
11/18/2013 04:33PM
Re: Subquery with range uses filesort  
1,744
David Marcus
11/18/2013 07:54PM
Re: Subquery with range uses filesort  
1,411
Rick James
11/19/2013 04:10PM
Re: Subquery with range uses filesort  
1,293
David Marcus
11/19/2013 08:36PM
Re: Subquery with range uses filesort  
1,403
Rick James
11/21/2013 02:55PM
Re: Subquery with range uses filesort  
1,607
David Marcus
12/05/2013 03:46PM
Re: Subquery with range uses filesort  
1,221
Rick James
12/07/2013 02:10PM
Re: Subquery with range uses filesort  
1,237
David Marcus
12/09/2013 06:08PM
Re: Subquery with range uses filesort  
1,238
David Marcus
12/14/2013 09:51PM
Re: Subquery with range uses filesort  
1,215
David Marcus
12/14/2013 10:17PM
Re: Subquery with range uses filesort  
1,303
Rick James
12/15/2013 11:29PM
Re: Subquery with range uses filesort  
1,304
David Marcus
12/17/2013 06:58PM
Re: Subquery with range uses filesort  
1,230
Rick James
12/18/2013 05:49PM
Re: Subquery with range uses filesort  
1,260
David Marcus
12/18/2013 08:28PM
Re: Subquery with range uses filesort  
1,339
Rick James
12/19/2013 10:13PM
Re: Subquery with range uses filesort  
1,307
David Marcus
12/19/2013 10:28PM
Re: Subquery with range uses filesort  
1,169
Rick James
12/20/2013 07:06PM
Re: Subquery with range uses filesort  
1,271
David Marcus
12/21/2013 07:36AM
Re: Subquery with range uses filesort  
1,298
Rick James
12/22/2013 10:01AM
Re: Subquery with range uses filesort  
1,343
David Marcus
12/22/2013 10:45AM
Re: Subquery with range uses filesort  
1,202
David Marcus
12/25/2013 09:30PM
Optimizer executes inperformant subquery first  
3,020
Martin Kirchner
12/06/2013 07:12AM
Re: Optimizer executes inperformant subquery first  
1,173
Rick James
12/07/2013 02:30PM
Re: Optimizer executes inperformant subquery first  
1,427
Martin Kirchner
12/07/2013 03:49PM
Re: Optimizer executes inperformant subquery first  
1,529
Øystein Grøvlen
12/09/2013 09:48AM
Re: Optimizer executes inperformant subquery first  
1,362
Martin Kirchner
12/18/2013 03:04AM
Re: Optimizer executes inperformant subquery first  
1,233
Øystein Grøvlen
12/19/2013 02:45AM
Re: Optimizer executes inperformant subquery first  
1,140
Martin Kirchner
12/20/2013 02:24AM
Re: Optimizer executes inperformant subquery first  
1,097
Øystein Grøvlen
12/23/2013 08:07AM
Re: Optimizer executes inperformant subquery first  
1,104
Rick James
12/23/2013 01:11PM
Re: Optimizer executes inperformant subquery first  
1,216
Martin Kirchner
12/18/2013 05:16AM
Re: Optimizer executes inperformant subquery first  
1,236
Rick James
12/18/2013 06:49PM
Re: Optimizer executes inperformant subquery first  
1,154
Øystein Grøvlen
12/19/2013 02:49AM
my.cnf  
2,078
Juan Medina
10/27/2013 02:08PM
Re: my.cnf  
1,032
Rick James
10/29/2013 07:12PM
my.cnf optimization please help  
3,339
Ivan Kratunkov
10/28/2013 03:39AM
Re: my.cnf optimization please help  
1,189
Rick James
10/29/2013 07:10PM
MySQL Optimizer: Features in MySQL 5.7  
1,733
Edwin Desouza
10/18/2013 09:33AM
I need help in optimzing a order by clause in a join query  
1,981
George Maharis
10/08/2013 12:09PM
Re: I need help in optimzing a order by clause in a join query  
1,066
Rick James
10/10/2013 09:34PM
Re: I need help in optimzing a order by clause in a join query  
1,039
George Maharis
10/12/2013 02:07PM
Re: I need help in optimzing a order by clause in a join query  
1,061
Rick James
10/16/2013 08:36PM
MySQL My.cnf Config Help  
2,183
Mathieu Louis
10/03/2013 09:32PM
Very slow dependent subquery  
2,291
patrick canarelli
09/18/2013 03:06AM
Re: Very slow dependent subquery  
1,368
Øystein Grøvlen
09/18/2013 07:06AM
Re: Very slow dependent subquery  
1,301
patrick canarelli
09/18/2013 07:51AM
Re: Very slow dependent subquery  
1,272
Øystein Grøvlen
09/18/2013 02:57PM
Re: Very slow dependent subquery  
1,180
Peter Brawley
09/18/2013 02:13PM
Re: Very slow dependent subquery  
1,132
patrick canarelli
09/18/2013 03:10PM
Re: Very slow dependent subquery  
1,137
Rick James
09/24/2013 10:04PM
Re: Very slow dependent subquery  
1,421
patrick canarelli
09/25/2013 12:53AM
big database +1 million rows/days  
2,625
khaoula el hammoumi
09/11/2013 04:06AM
Re: big database +1 million rows/days  
1,100
khaoula el hammoumi
09/12/2013 01:37AM
Re: big database +1 million rows/days  
1,084
Rick James
09/13/2013 10:59PM
Optimize query join with 25,000 records  
2,122
Andrea Presazzi
08/26/2013 02:27AM
Re: Optimize query join with 25,000 records  
1,066
Rick James
08/31/2013 04:19PM
Index not used for JOIN on compound key plus WHERE range filter  
3,289
Chad B
08/15/2013 09:24AM
Re: Index not used for JOIN on compound key plus WHERE range filter  
1,521
Chad B
08/15/2013 10:44AM
Re: Index not used for JOIN on compound key plus WHERE range filter  
1,275
Rick James
08/31/2013 04:13PM
query index not used  
1,715
Adrian Petre
08/15/2013 05:23AM
Re: query index not used  
962
Rick James
08/31/2013 03:41PM
optimize request with order by and limit  
2,349
yassine laouija
07/18/2013 05:26AM
Re: optimize request with order by and limit  
1,246
Rick James
07/20/2013 10:25PM
Re: optimize request with order by and limit  
1,062
yassine laouija
07/22/2013 09:46AM
Re: optimize request with order by and limit  
998
Rick James
07/23/2013 08:58AM
Re: optimize request with order by and limit  
1,044
yassine laouija
07/26/2013 04:07AM
Re: optimize request with order by and limit  
1,056
Rick James
07/26/2013 11:53PM
Re: optimize request with order by and limit  
1,139
yassine laouija
07/29/2013 04:40AM
Re: optimize request with order by and limit  
1,051
Rick James
08/01/2013 10:39PM
providing a single line for multiple records from a table  
1,938
raja chacham
07/23/2013 09:56AM
Re: providing a single line for multiple records from a table  
951
Rick James
07/24/2013 09:08AM
Optimize Inner Join With WHERE BETWEEN dates  
3,429
Anthony Galano
05/21/2013 07:32PM
Re: Optimize Inner Join With WHERE BETWEEN dates  
1,464
Rick James
05/22/2013 06:41PM
Re: Optimize Inner Join With WHERE BETWEEN dates  
1,391
Anthony Galano
05/24/2013 12:40PM
Re: Optimize Inner Join With WHERE BETWEEN dates  
1,286
Rick James
05/25/2013 11:43AM
Re: Optimize Inner Join With WHERE BETWEEN dates  
1,235
Anthony Galano
05/30/2013 05:30PM
Re: Optimize Inner Join With WHERE BETWEEN dates  
1,249
Rick James
06/02/2013 01:15PM
Re: Optimize Inner Join With WHERE BETWEEN dates  
1,404
Anthony Galano
06/03/2013 05:02PM
Re: Optimize Inner Join With WHERE BETWEEN dates  
2,554
Rick James
06/04/2013 11:49PM
Query optimization  
2,386
Jan Kowalski
05/10/2013 05:35AM
Re: Query optimization  
1,169
Rick James
05/12/2013 08:42PM
Re: Query optimization  
1,128
Jan Kowalski
05/15/2013 06:45AM
Re: Query optimization  
1,138
Jan Kowalski
05/15/2013 08:35AM
Re: Query optimization  
1,235
Rick James
05/16/2013 08:18AM
Re: Query optimization  
1,163
Jan Kowalski
05/17/2013 03:52AM
Re: Query optimization  
1,144
Rick James
05/17/2013 11:47PM
Re: Query optimization  
1,051
Jan Kowalski
05/21/2013 08:51AM
Re: Query optimization  
1,139
Jan Kowalski
05/22/2013 08:08AM
MySQL Optimizer: When is a Subquery Executed?  
1,793
Edwin Desouza
05/02/2013 10:05AM
Index optimized left join with group by  
2,913
Michal Kurgan
03/11/2013 05:41PM
Re: Index optimized left join with group by  
1,146
Øystein Grøvlen
03/12/2013 04:16AM
Select last row that is less than or equal to a date  
5,960
David Marcus
01/23/2013 06:35PM
Re: Select last row that is less than or equal to a date  
1,591
Rick James
01/24/2013 10:27PM
Re: Select last row that is less than or equal to a date  
1,616
David Marcus
01/26/2013 09:35AM
Re: Select last row that is less than or equal to a date  
1,400
Rick James
01/27/2013 10:19AM
Re: Select last row that is less than or equal to a date  
1,531
David Marcus
01/27/2013 12:00PM
Re: Select last row that is less than or equal to a date  
1,322
Rick James
01/29/2013 12:51AM
Re: Select last row that is less than or equal to a date  
1,341
David Marcus
01/29/2013 06:28PM
Re: Select last row that is less than or equal to a date  
1,762
Øystein Grøvlen
01/30/2013 04:50AM
Re: Select last row that is less than or equal to a date  
1,428
David Marcus
01/30/2013 05:50PM
Re: Select last row that is less than or equal to a date  
1,367
Øystein Grøvlen
02/01/2013 06:03AM
Re: Select last row that is less than or equal to a date  
1,453
David Marcus
02/02/2013 07:14AM
Re: Select last row that is less than or equal to a date  
1,382
Øystein Grøvlen
02/02/2013 01:49PM
Re: Select last row that is less than or equal to a date  
1,409
David Marcus
02/02/2013 02:25PM
Re: Select last row that is less than or equal to a date  
1,303
Øystein Grøvlen
02/03/2013 05:58AM
Re: Select last row that is less than or equal to a date  
1,315
David Marcus
02/03/2013 10:04AM
Re: Select last row that is less than or equal to a date  
1,404
Rick James
02/03/2013 10:43AM
Re: Select last row that is less than or equal to a date  
1,909
David Marcus
02/03/2013 12:33PM
Re: Select last row that is less than or equal to a date  
1,395
Rick James
02/03/2013 02:59PM
Re: Select last row that is less than or equal to a date  
1,477
David Marcus
02/03/2013 03:35PM
Re: Select last row that is less than or equal to a date  
1,418
Rick James
02/03/2013 04:02PM
Re: Select last row that is less than or equal to a date  
1,429
David Marcus
02/03/2013 04:15PM
Very slow query, help please  
2,469
Jaume Roca
01/29/2013 10:18AM
Re: Very slow query, help please  
1,346
Øystein Grøvlen
01/30/2013 05:12AM
Re: Very slow query, help please  
1,306
Rick James
01/30/2013 08:38AM
Re: Very slow query, help please  
1,362
Jaume Roca
01/30/2013 09:05AM
MySQL 5.6: IN Subqueries Are Optimized away  
1,838
Edwin Desouza
01/29/2013 01:08PM
CPU load very very high !!!!, Please assist !!  
7,704
Sayed Ali
01/22/2013 06:49AM
Re: CPU load very very high !!!!, Please assist !!  
2,747
Rick James
01/22/2013 11:32PM
New EXPLAIN Features in MySQL 5.6 – FORMAT=JSON actually adds more information!  
1,953
Edwin Desouza
01/22/2013 05:58PM
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