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MySQL Optimizer: Features in MySQL 5.7  
1,798
Edwin Desouza
10/18/2013 09:33AM
I need help in optimzing a order by clause in a join query  
2,040
George Maharis
10/08/2013 12:09PM
Re: I need help in optimzing a order by clause in a join query  
1,101
Rick James
10/10/2013 09:34PM
Re: I need help in optimzing a order by clause in a join query  
1,073
George Maharis
10/12/2013 02:07PM
Re: I need help in optimzing a order by clause in a join query  
1,099
Rick James
10/16/2013 08:36PM
MySQL My.cnf Config Help  
2,266
Mathieu Louis
10/03/2013 09:32PM
Very slow dependent subquery  
2,341
patrick canarelli
09/18/2013 03:06AM
Re: Very slow dependent subquery  
1,412
Øystein Grøvlen
09/18/2013 07:06AM
Re: Very slow dependent subquery  
1,339
patrick canarelli
09/18/2013 07:51AM
Re: Very slow dependent subquery  
1,307
Øystein Grøvlen
09/18/2013 02:57PM
Re: Very slow dependent subquery  
1,230
Peter Brawley
09/18/2013 02:13PM
Re: Very slow dependent subquery  
1,160
patrick canarelli
09/18/2013 03:10PM
Re: Very slow dependent subquery  
1,175
Rick James
09/24/2013 10:04PM
Re: Very slow dependent subquery  
1,480
patrick canarelli
09/25/2013 12:53AM
big database +1 million rows/days  
2,730
khaoula el hammoumi
09/11/2013 04:06AM
Re: big database +1 million rows/days  
1,126
khaoula el hammoumi
09/12/2013 01:37AM
Re: big database +1 million rows/days  
1,117
Rick James
09/13/2013 10:59PM
Optimize query join with 25,000 records  
2,202
Andrea Presazzi
08/26/2013 02:27AM
Re: Optimize query join with 25,000 records  
1,100
Rick James
08/31/2013 04:19PM
Index not used for JOIN on compound key plus WHERE range filter  
3,415
Chad B
08/15/2013 09:24AM
Re: Index not used for JOIN on compound key plus WHERE range filter  
1,571
Chad B
08/15/2013 10:44AM
Re: Index not used for JOIN on compound key plus WHERE range filter  
1,320
Rick James
08/31/2013 04:13PM
query index not used  
1,769
Adrian Petre
08/15/2013 05:23AM
Re: query index not used  
994
Rick James
08/31/2013 03:41PM
optimize request with order by and limit  
2,426
yassine laouija
07/18/2013 05:26AM
Re: optimize request with order by and limit  
1,283
Rick James
07/20/2013 10:25PM
Re: optimize request with order by and limit  
1,085
yassine laouija
07/22/2013 09:46AM
Re: optimize request with order by and limit  
1,037
Rick James
07/23/2013 08:58AM
Re: optimize request with order by and limit  
1,077
yassine laouija
07/26/2013 04:07AM
Re: optimize request with order by and limit  
1,090
Rick James
07/26/2013 11:53PM
Re: optimize request with order by and limit  
1,180
yassine laouija
07/29/2013 04:40AM
Re: optimize request with order by and limit  
1,086
Rick James
08/01/2013 10:39PM
providing a single line for multiple records from a table  
1,990
raja chacham
07/23/2013 09:56AM
Re: providing a single line for multiple records from a table  
977
Rick James
07/24/2013 09:08AM
Optimize Inner Join With WHERE BETWEEN dates  
3,568
Anthony Galano
05/21/2013 07:32PM
Re: Optimize Inner Join With WHERE BETWEEN dates  
1,513
Rick James
05/22/2013 06:41PM
Re: Optimize Inner Join With WHERE BETWEEN dates  
1,466
Anthony Galano
05/24/2013 12:40PM
Re: Optimize Inner Join With WHERE BETWEEN dates  
1,322
Rick James
05/25/2013 11:43AM
Re: Optimize Inner Join With WHERE BETWEEN dates  
1,313
Anthony Galano
05/30/2013 05:30PM
Re: Optimize Inner Join With WHERE BETWEEN dates  
1,290
Rick James
06/02/2013 01:15PM
Re: Optimize Inner Join With WHERE BETWEEN dates  
1,461
Anthony Galano
06/03/2013 05:02PM
Re: Optimize Inner Join With WHERE BETWEEN dates  
2,618
Rick James
06/04/2013 11:49PM
Query optimization  
2,473
Jan Kowalski
05/10/2013 05:35AM
Re: Query optimization  
1,213
Rick James
05/12/2013 08:42PM
Re: Query optimization  
1,169
Jan Kowalski
05/15/2013 06:45AM
Re: Query optimization  
1,179
Jan Kowalski
05/15/2013 08:35AM
Re: Query optimization  
1,289
Rick James
05/16/2013 08:18AM
Re: Query optimization  
1,209
Jan Kowalski
05/17/2013 03:52AM
Re: Query optimization  
1,178
Rick James
05/17/2013 11:47PM
Re: Query optimization  
1,089
Jan Kowalski
05/21/2013 08:51AM
Re: Query optimization  
1,181
Jan Kowalski
05/22/2013 08:08AM
MySQL Optimizer: When is a Subquery Executed?  
1,845
Edwin Desouza
05/02/2013 10:05AM
Index optimized left join with group by  
3,001
Michal Kurgan
03/11/2013 05:41PM
Re: Index optimized left join with group by  
1,185
Øystein Grøvlen
03/12/2013 04:16AM
Select last row that is less than or equal to a date  
6,266
David Marcus
01/23/2013 06:35PM
Re: Select last row that is less than or equal to a date  
1,763
Rick James
01/24/2013 10:27PM
Re: Select last row that is less than or equal to a date  
1,794
David Marcus
01/26/2013 09:35AM
Re: Select last row that is less than or equal to a date  
1,581
Rick James
01/27/2013 10:19AM
Re: Select last row that is less than or equal to a date  
1,735
David Marcus
01/27/2013 12:00PM
Re: Select last row that is less than or equal to a date  
1,497
Rick James
01/29/2013 12:51AM
Re: Select last row that is less than or equal to a date  
1,530
David Marcus
01/29/2013 06:28PM
Re: Select last row that is less than or equal to a date  
1,957
Øystein Grøvlen
01/30/2013 04:50AM
Re: Select last row that is less than or equal to a date  
1,499
David Marcus
01/30/2013 05:50PM
Re: Select last row that is less than or equal to a date  
1,434
Øystein Grøvlen
02/01/2013 06:03AM
Re: Select last row that is less than or equal to a date  
1,526
David Marcus
02/02/2013 07:14AM
Re: Select last row that is less than or equal to a date  
1,444
Øystein Grøvlen
02/02/2013 01:49PM
Re: Select last row that is less than or equal to a date  
1,473
David Marcus
02/02/2013 02:25PM
Re: Select last row that is less than or equal to a date  
1,366
Øystein Grøvlen
02/03/2013 05:58AM
Re: Select last row that is less than or equal to a date  
1,390
David Marcus
02/03/2013 10:04AM
Re: Select last row that is less than or equal to a date  
1,467
Rick James
02/03/2013 10:43AM
Re: Select last row that is less than or equal to a date  
1,996
David Marcus
02/03/2013 12:33PM
Re: Select last row that is less than or equal to a date  
1,468
Rick James
02/03/2013 02:59PM
Re: Select last row that is less than or equal to a date  
1,562
David Marcus
02/03/2013 03:35PM
Re: Select last row that is less than or equal to a date  
1,480
Rick James
02/03/2013 04:02PM
Re: Select last row that is less than or equal to a date  
1,505
David Marcus
02/03/2013 04:15PM
Very slow query, help please  
2,551
Jaume Roca
01/29/2013 10:18AM
Re: Very slow query, help please  
1,396
Øystein Grøvlen
01/30/2013 05:12AM
Re: Very slow query, help please  
1,347
Rick James
01/30/2013 08:38AM
Re: Very slow query, help please  
1,384
Jaume Roca
01/30/2013 09:05AM
MySQL 5.6: IN Subqueries Are Optimized away  
1,883
Edwin Desouza
01/29/2013 01:08PM
CPU load very very high !!!!, Please assist !!  
7,999
Sayed Ali
01/22/2013 06:49AM
Re: CPU load very very high !!!!, Please assist !!  
2,833
Rick James
01/22/2013 11:32PM
New EXPLAIN Features in MySQL 5.6 – FORMAT=JSON actually adds more information!  
2,006
Edwin Desouza
01/22/2013 05:58PM
Can we expect an enhancement for derived table merge optimization?  
3,586
Michael Hogue
01/04/2013 12:04PM
Re: Can we expect an enhancement for derived table merge optimization?  
1,440
Rick James
01/07/2013 10:50PM
Re: Can we expect an enhancement for derived table merge optimization?  
1,844
Roy Lyseng
01/11/2013 09:18AM
Re: Can we expect an enhancement for derived table merge optimization?  
1,277
Rick James
01/13/2013 12:24PM
Re: Can we expect an enhancement for derived table merge optimization?  
1,441
Roy Lyseng
01/14/2013 08:43AM
Re: Can we expect an enhancement for derived table merge optimization?  
1,255
Rick James
01/14/2013 09:54AM
Re: Can we expect an enhancement for derived table merge optimization?  
1,355
Roy Lyseng
01/15/2013 06:15AM
Re: Can we expect an enhancement for derived table merge optimization?  
1,271
Roy Lyseng
01/11/2013 08:51AM
How to best optimize MYSQL Database  
2,282
Muhammad Usman
12/10/2012 03:45AM
Re: How to best optimize MYSQL Database  
1,236
Rick James
12/21/2012 12:49PM
mysql subquery query optimization question  
2,551
Yong Yim
01/12/2013 09:24AM
Re: mysql subquery query optimization question  
1,167
Rick James
01/13/2013 11:30AM
Create a New Datatype  
2,218
Andy Gurzynski
01/06/2013 01:00AM
Re: Create a New Datatype  
1,104
Rick James
01/07/2013 11:01PM
MySQL Optimizer: InnoDB extended secondary keys  
2,226
Edwin Desouza
12/21/2012 12:12PM
Optimizer for innodb does not reduce "data_free"  
4,156
Sebastian Schött
12/06/2012 03:39AM
Re: Optimizer for innodb does not reduce "data_free"  
1,614
Rick James
12/08/2012 01:33PM
Complex query - need advise  
2,573
chris boer
11/03/2012 04:16PM
Re: Complex query - need advise  
1,275
chris boer
11/03/2012 04:24PM
Re: Complex query - need advise  
1,245
chris boer
11/04/2012 10:05AM
Re: Complex query - need advise  
1,554
Rick James
11/05/2012 11:12AM
Follow up on "Query Execution Plan"  
2,178
Chris Slominski
10/24/2012 11:59AM
Re: Follow up on "Query Execution Plan"  
1,213
Chris Slominski
10/25/2012 11:14AM
Re: Follow up on "Query Execution Plan"  
1,064
Chris Slominski
10/25/2012 06:15AM
JOIN query too slow  
2,246
N. Kovac
10/13/2012 11:52AM
Re: JOIN query too slow  
1,106
Peter Brawley
10/14/2012 10:26AM
Re: JOIN query too slow  
1,167
Rick James
10/16/2012 07:48PM
bulk update very slow  
4,619
james che
09/25/2012 02:51PM
Re: bulk update very slow  
1,760
james che
09/26/2012 02:58PM
Re: bulk update very slow  
1,784
Rick James
09/27/2012 08:19PM
Re: bulk update very slow  
2,603
Jørgen Løland
09/27/2012 12:01PM
Why Query Cache Actived Returns Wrong Results?  
2,606
Daniel Estrada
09/22/2012 08:57PM
Re: Why Query Cache Actived Returns Wrong Results?  
1,407
Rick James
09/23/2012 03:46PM
Re: Why Query Cache Actived Returns Wrong Results?  
1,368
Daniel Estrada
09/23/2012 08:24PM
Re: Why Query Cache Actived Returns Wrong Results?  
1,100
Rick James
09/24/2012 11:43PM
Join? Union? I am so lost.  
2,084
Hank Reardon
09/17/2012 09:09AM
Re: Join? Union? I am so lost.  
1,094
Rick James
09/18/2012 07:48AM
How make indexes work with group by statement  
2,039
Adnan Raza
09/13/2012 12:48AM
Re: How make indexes work with group by statement  
1,156
Rick James
09/15/2012 10:34PM
Re: How make indexes work with group by statement  
1,206
Jørgen Løland
09/13/2012 01:50AM
Query Optimizer Problem - OrderBy - 5.0.51 to 5.5.27  
2,437
Dominik Bieringer
09/05/2012 02:57AM
Re: Query Optimizer Problem - OrderBy - 5.0.51 to 5.5.27  
1,105
Rick James
09/06/2012 10:42PM
Re: Query Optimizer Problem - OrderBy - 5.0.51 to 5.5.27  
1,202
Øystein Grøvlen
09/06/2012 04:32AM
optimize the query  
2,200
ch srinivas
08/27/2012 10:47PM
Re: optimize the query  
1,138
Øystein Grøvlen
08/28/2012 01:43AM
Re: optimize the query  
1,032
ch srinivas
08/29/2012 04:15AM
Re: optimize the query  
1,100
Øystein Grøvlen
08/29/2012 04:39AM
Re: optimize the query  
1,011
ch srinivas
08/29/2012 05:38AM
Re: optimize the query  
1,071
Rick James
08/30/2012 07:20AM
Query with GROUP BY not using Index  
2,622
Imran Akbar
08/14/2012 01:06PM
Re: Query with GROUP BY not using Index  
1,261
Øystein Grøvlen
08/15/2012 02:46AM
Re: Query with GROUP BY not using Index  
1,191
Imran Akbar
08/16/2012 10:30AM
Re: Query with GROUP BY not using Index  
1,430
Øystein Grøvlen
08/17/2012 02:58AM
Re: Query with GROUP BY not using Index  
1,207
Rick James
08/18/2012 10:30PM
Re: Query with GROUP BY not using Index  
1,143
Imran Akbar
08/24/2012 12:41PM
Re: Query with GROUP BY not using Index  
1,225
Øystein Grøvlen
08/28/2012 03:11AM
Re: Query with GROUP BY not using Index  
1,265
Imran Akbar
08/28/2012 06:21PM
Re: Query with GROUP BY not using Index  
1,613
Øystein Grøvlen
08/29/2012 01:28AM
Re: Query with GROUP BY not using Index  
1,110
Imran Akbar
08/29/2012 10:36AM
CONCAT and Index in where clause  
13,822
Aurelien PANIZZA
08/22/2012 08:45AM
Re: CONCAT and Index in where clause  
4,885
Øystein Grøvlen
08/23/2012 01:15AM
Re: CONCAT and Index in where clause  
3,787
Rick James
08/23/2012 09:13PM
Re: CONCAT and Index in where clause  
3,801
Aurelien PANIZZA
08/27/2012 09:53AM
Re: CONCAT and Index in where clause  
3,772
Øystein Grøvlen
08/28/2012 02:50AM
Simple query spending too much time in 'statistics' state without reason  
11,501
Vincent B.
08/21/2012 06:19AM
Re: Simple query spending too much time in 'statistics' state without reason  
6,138
Jørgen Løland
08/24/2012 06:24AM
Re: Simple query spending too much time in 'statistics' state without reason  
4,451
Vincent B.
08/28/2012 01:53AM
Re: Simple query spending too much time in 'statistics' state without reason  
5,764
Rick James
08/22/2012 07:44PM
Order By Slows down Joins  
3,355
Sami BH
08/22/2012 09:12AM
Re: Order By Slows down Joins  
1,015
Rick James
08/23/2012 08:56PM
always uses filesort even after adding indexes  
2,291
Pranav Gore
08/22/2012 02:49AM
Re: always uses filesort even after adding indexes  
1,106
Rick James
08/22/2012 10:52PM
STRAIGHT_JOIN for OUTER JOINGS  
3,299
Paul Tsui
08/19/2012 08:28PM
Re: STRAIGHT_JOIN for OUTER JOINGS  
1,511
Øystein Grøvlen
08/20/2012 05:16AM
CPU usage 99% - and query very slow - help  
4,334
irox ferenc
08/03/2012 10:49AM
Re: CPU usage 99% - and query very slow - help  
1,757
Rick James
08/04/2012 01:36PM
Re: CPU usage 99% - and query very slow - help  
2,460
robert eeeeee
08/06/2012 01:04PM
Re: CPU usage 99% - and query very slow - help  
1,788
Øystein Grøvlen
08/15/2012 03:09AM
Execution plan: wrong index selected, very poor performance.  
3,886
Andrej Andrejevic
07/18/2012 10:31AM
Re: Execution plan: wrong index selected, very poor performance.  
1,575
Rick James
07/19/2012 10:07PM
Re: Execution plan: wrong index selected, very poor performance.  
1,398
Andrej Andrejevic
07/20/2012 01:38AM
Re: Execution plan: wrong index selected, very poor performance.  
1,212
Andrej Andrejevic
07/24/2012 04:27AM
Re: Execution plan: wrong index selected, very poor performance.  
1,229
Rick James
07/25/2012 12:21AM
Index for Query  
2,402
dileep ch
07/17/2012 12:41AM
Re: Index for Query  
1,213
Rick James
07/17/2012 10:36PM
Re: Index for Query  
1,230
dileep ch
07/18/2012 11:52PM
Re: Index for Query  
1,862
Rick James
07/19/2012 09:49PM
best way to optimize this query  
2,517
Jap bn
07/14/2012 09:54AM
Re: best way to optimize this query  
1,470
Rick James
07/15/2012 10:11PM
Optimizer being overly aggressive  
2,406
Adrian Cornish
07/06/2012 08:18PM
Re: Optimizer being overly aggressive  
1,237
Rick James
07/10/2012 12:49PM
Re: Optimizer being overly aggressive  
1,229
Adrian Cornish
07/10/2012 08:54PM
multiple-column index and order by  
2,665
Raphael Hoffmann
07/06/2012 05:59PM
Re: multiple-column index and order by  
1,262
Rick James
07/10/2012 12:55PM
From Months to Seconds with Subquery Materialization  
1,868
Edwin DeSouza
07/09/2012 11:15AM
performing mysqldump corrected query issue?  
2,226
Peter Sylvester
06/26/2012 01:12PM
Re: performing mysqldump corrected query issue?  
1,238
Rick James
07/01/2012 06:43PM
Re: performing mysqldump corrected query issue?  
1,041
Peter Sylvester
06/26/2012 02:08PM
difference between READ and SCAN  
1,950
Linhai Song
06/20/2012 04:05PM
Re: difference between READ and SCAN  
996
Rick James
06/20/2012 08:23PM
Re: difference between READ and SCAN  
1,314
Linhai Song
06/21/2012 12:19PM
to optimize a self join request  
1,833
Oracleuser user
06/14/2012 08:23AM
Re: to optimize a self join request  
1,260
Rick James
06/15/2012 08:19AM
This topic has been moved.:  difference between READ and SCAN  
0
Linhai Song
06/20/2012 05:47PM
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