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• Announcing July 2026 Releases featuring MySQL Server 26.7.0, 9.7.2 and 8.4.11	08/01/2026 04:40AM

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Configuration review requested

2,731

Jens Meier

04/13/2016 11:55AM

Re: Configuration review requested

1,091

Rick James

04/14/2016 01:39PM

block_ops_in and block_ops_out meaning

5,681

hua kai

03/18/2016 02:33AM

Re: block_ops_in and block_ops_out meaning

2,335

Rick James

03/21/2016 11:34PM

Re: block_ops_in and block_ops_out meaning

2,327

Peter Brawley

03/22/2016 02:03AM

Re: block_ops_in and block_ops_out meaning

2,288

hua kai

03/25/2016 12:30AM

Re: block_ops_in and block_ops_out meaning

2,018

hua kai

04/14/2016 12:52AM

order by primary key slowly

3,485

varky chan

04/05/2016 10:42PM

Re: order by primary key slowly

1,535

Øystein Grøvlen

04/06/2016 04:35AM

Re: order by primary key slowly

1,494

varky chan

04/06/2016 10:15AM

Re: order by primary key slowly

1,478

Peter Brawley

04/06/2016 11:23AM

Re: order by primary key slowly

1,588

varky chan

04/06/2016 08:11PM

Re: order by primary key slowly

1,559

Peter Brawley

04/06/2016 10:35PM

Re: order by primary key slowly

1,485

varky chan

04/07/2016 12:34AM

Re: order by primary key slowly

4,304

Øystein Grøvlen

04/07/2016 07:21AM

Re: order by primary key slowly

1,574

Peter Brawley

04/07/2016 10:20AM

Re: order by primary key slowly

1,489

varky chan

04/07/2016 11:26PM

Re: order by primary key slowly

1,565

Rick James

04/12/2016 07:42PM

Re: order by primary key slowly

1,420

Peter Brawley

04/06/2016 08:57AM

Re: order by primary key slowly

1,456

varky chan

04/06/2016 10:17AM

[INNODB] why there are many "waiting for table level lock"?

2,066

HANWEN YIN

04/11/2016 12:08AM

Re: [INNODB] why there are many "waiting for table level lock"?

1,259

Rick James

04/12/2016 07:27PM

Improve performance when altering huge tables

2,868

Davide Cicuta

04/04/2016 07:24AM

Re: Improve performance when altering huge tables

1,318

Rick James

04/05/2016 02:59PM

MySql 5.7 - Poor Performance PURGE BINARY LOGS

3,296

Davy Campano

03/23/2016 08:08PM

Re: MySql 5.7 - Poor Performance PURGE BINARY LOGS

1,340

Rick James

03/26/2016 11:58PM

Re: MySql 5.7 - Poor Performance PURGE BINARY LOGS

1,302

Davy Campano

03/29/2016 09:44AM

where the snapshot for select in transaction stored

1,867

hua kai

03/21/2016 03:03AM

Re: where the snapshot for select in transaction stored

1,015

Rick James

03/21/2016 11:21PM

Difference execution plans for same query

2,353

Devrishi Shandilya

02/25/2016 12:05AM

Re: Difference execution plans for same query

1,224

Peter Brawley

02/25/2016 01:51AM

Re: Difference execution plans for same query

1,293

Øystein Grøvlen

02/25/2016 03:51AM

Re: Difference execution plans for same query

1,231

Rick James

03/05/2016 01:19AM

Slow join performance

2,330

Ra Nala

11/27/2015 04:55AM

Re: Slow join performance

1,244

Rick James

11/28/2015 03:02PM

Re: Slow join performance

1,217

Ra Nala

02/25/2016 06:22AM

which is best for JOIN approach

2,125

Ra Nala

11/24/2015 09:39AM

Re: which is best for JOIN approach

1,297

Øystein Grøvlen

11/25/2015 02:14AM

Re: which is best for JOIN approach

1,277

Ra Nala

11/25/2015 02:42AM

Re: which is best for JOIN approach

1,315

Rick James

11/29/2015 11:53AM

Re: which is best for JOIN approach

1,169

Ra Nala

02/19/2016 05:28AM

Re: which is best for JOIN approach

1,141

Peter Brawley

02/21/2016 04:56PM

Re: which is best for JOIN approach

1,235

Ra Nala

02/19/2016 05:31AM

Re: which is best for JOIN approach

1,123

Rick James

02/21/2016 01:40PM

Re: which is best for JOIN approach

1,177

Rick James

02/21/2016 01:43PM

Re: which is best for JOIN approach

1,159

Ra Nala

02/25/2016 05:50AM

Why is wrong index being selected

1,934

Steve Bell

02/23/2016 01:54PM

Re: Why is wrong index being selected

1,027

Rick James

02/23/2016 11:39PM

Re: Why is wrong index being selected

1,290

Øystein Grøvlen

02/24/2016 03:22AM

Re: Why is wrong index being selected

983

Steve Bell

02/25/2016 02:47AM

Distinct or Group by which is faster

2,162

Ra Nala

02/22/2016 08:50AM

Re: Distinct or Group by which is faster

1,184

Peter Brawley

02/22/2016 12:33PM

Re: Distinct or Group by which is faster

1,150

Chandan Kumar

02/23/2016 12:51PM

MySQL server is not disk bound, how do I make it faster?

2,037

02/21/2016 09:35PM

Re: MySQL server is not disk bound, how do I make it faster?

920

Peter Brawley

02/22/2016 12:38PM

Re: MySQL server is not disk bound, how do I make it faster?

1,001

Rick James

02/22/2016 06:18PM

mysql text datatype SELECT query slow even with tmp dir on tmpfs

1,834

02/22/2016 08:36AM

Re: mysql text datatype SELECT query slow even with tmp dir on tmpfs

886

Peter Brawley

02/22/2016 12:35PM

How can I improve this table and query

2,541

Adam Copley

02/17/2016 04:49AM

Re: How can I improve this table and query

1,176

Øystein Grøvlen

02/17/2016 06:07AM

Re: How can I improve this table and query

1,282

Adam Copley

02/17/2016 08:25AM

Re: How can I improve this table and query

1,030

Adam Copley

02/17/2016 08:26AM

Re: How can I improve this table and query

1,143

Øystein Grøvlen

02/17/2016 08:51AM

Re: How can I improve this table and query

1,673

Adam Copley

02/17/2016 09:03AM

Re: How can I improve this table and query

1,117

Rick James

02/21/2016 11:14PM

Does prefixing field names with their table name improve query speed?

1,832

Guillaume TRUCHOT

02/18/2016 04:02PM

Re: Does prefixing field names with their table name improve query speed?

970

Peter Brawley

02/18/2016 05:21PM

Re: Does prefixing field names with their table name improve query speed?

1,040

Rick James

02/21/2016 07:19PM

slow response when where clause has a field from 2nd table in a left join

1,889

Ravi Malghan

02/12/2016 12:51PM

Re: slow response when where clause has a field from 2nd table in a left join

1,188

Øystein Grøvlen

02/15/2016 02:10AM

Re: slow response when where clause has a field from 2nd table in a left join

916

Rick James

02/15/2016 04:17PM

Re: slow response when where clause has a field from 2nd table in a left join

922

Ravi Malghan

02/19/2016 10:18AM

max_allowed_packet error

2,632

Ra Nala

02/02/2016 05:12AM

Re: max_allowed_packet error

1,022

Rick James

02/06/2016 07:26PM

Getting NULL digest_text for all queries in 2 of my 3 DBs (performance_schema)

2,242

Bill Joyce

12/06/2015 11:41PM

Re: Getting NULL digest_text for all queries in 2 of my 3 DBs (performance_schema)

1,100

Mayank Prasad

12/10/2015 03:53AM

Re: Getting NULL digest_text for all queries in 2 of my 3 DBs (performance_schema)

1,219

Bill Joyce

02/04/2016 04:15PM

query performance optimization

3,413

Devrishi Shandilya

01/18/2016 04:49AM

Re: query performance optimization

1,156

Øystein Grøvlen

01/19/2016 02:30AM

Re: query performance optimization

1,040

Devrishi Shandilya

01/19/2016 02:50AM

Re: query performance optimization

2,031

Øystein Grøvlen

01/19/2016 06:24AM

Re: query performance optimization

1,203

Rick James

01/22/2016 06:29PM

Re: query performance optimization

1,246

Øystein Grøvlen

01/29/2016 04:37AM

Re: query performance optimization

1,535

Devrishi Shandilya

01/22/2016 06:18AM

Re: query performance optimization

1,110

Øystein Grøvlen

01/27/2016 06:56AM

Re: query performance optimization

1,054

Peter Brawley

01/22/2016 01:08PM

Re: query performance optimization

1,172

Peter Brawley

01/22/2016 11:10PM

Slow performance on join query using indexes

2,846

Amit Kapoor

01/21/2016 02:36PM

Re: Slow performance on join query using indexes

1,385

Øystein Grøvlen

01/22/2016 03:02AM

Re: Slow performance on join query using indexes

1,202

Rick James

01/23/2016 07:43PM

high cpu on request with JOIN

2,062

Gérard Moisset

01/15/2016 03:49AM

Re: high cpu on request with JOIN

997

Øystein Grøvlen

01/15/2016 05:43AM

Lock wait timeout exceeded; try restarting transaction

13,087

Ra Nala

01/07/2016 05:28AM

Re: Lock wait timeout exceeded; try restarting transaction

3,236

Rick James

01/07/2016 10:47PM

Re: Lock wait timeout exceeded; try restarting transaction

3,306

Ra Nala

01/08/2016 12:45AM

Re: Lock wait timeout exceeded; try restarting transaction

2,462

Ra Nala

01/08/2016 06:23AM

Re: Lock wait timeout exceeded; try restarting transaction

2,552

Rick James

01/09/2016 11:52PM

1 blob table vs multiple blob tables

2,070

charles candy

01/08/2016 01:03AM

Re: 1 blob table vs multiple blob tables

1,043

01/08/2016 02:26AM

Thread State - Query End

5,345

Simon Green

01/04/2016 11:50AM

Re: Thread State - Query End

2,244

Øystein Grøvlen

01/05/2016 03:09AM

Re: Thread State - Query End

1,745

Øystein Grøvlen

01/06/2016 02:28AM

thread_cache_size: Need suggestion on this paramateer

1,772

Gnanasekar A.

12/26/2015 10:49AM

Re: thread_cache_size: Need suggestion on this paramateer

939

Rick James

12/27/2015 10:17AM

query hangs after migration from mysql 5.5 to mysql 5.6

2,149

walter verdelocco

12/19/2015 12:00PM

Re: query hangs after migration from mysql 5.5 to mysql 5.6

1,218

walter verdelocco

12/19/2015 01:21PM

Re: query hangs after migration from mysql 5.5 to mysql 5.6

1,001

Rick James

12/20/2015 07:31PM

Re: query hangs after migration from mysql 5.5 to mysql 5.6

969

walter verdelocco

12/21/2015 06:38AM

Re: query hangs after migration from mysql 5.5 to mysql 5.6

1,088

Øystein Grøvlen

12/21/2015 03:41AM

Re: query hangs after migration from mysql 5.5 to mysql 5.6

931

walter verdelocco

12/21/2015 06:40AM

Re: query hangs after migration from mysql 5.5 to mysql 5.6

992

Øystein Grøvlen

12/21/2015 07:22AM

Re: query hangs after migration from mysql 5.5 to mysql 5.6

972

walter verdelocco

12/22/2015 01:57AM

how to find out all sql and table of running transaction

2,068

elison chen

12/17/2015 01:30AM

Re: how to find out all sql and table of running transaction

1,044

Øystein Grøvlen

12/17/2015 03:08AM

show open tables in_use is high

2,604

elison chen

12/15/2015 07:23PM

Re: show open tables in_use is high

963

Rick James

12/16/2015 08:08PM

Slow query

2,428

Gerry Whitmarsh

12/11/2015 01:00PM

Re: Slow query

1,072

Peter Brawley

12/11/2015 05:00PM

Re: Slow query

1,014

Rick James

12/11/2015 06:56PM

Re: Slow query (solved)

973

Gerry Whitmarsh

12/12/2015 07:34AM

Re: Slow query

1,095

Øystein Grøvlen

12/14/2015 02:34AM

Re: Slow query

918

Gerry Whitmarsh

12/15/2015 08:48AM

Re: Slow query

997

Rick James

12/15/2015 10:57AM

Re: Slow query

1,075

Øystein Grøvlen

12/16/2015 02:33AM

query with bad performance after migration to mysql 5.6

3,119

walter verdelocco

12/04/2015 05:35AM

Re: query with bad performance after migration to mysql 5.6

1,408

Peter Brawley

12/05/2015 01:54PM

Re: query with bad performance after migration to mysql 5.6

1,351

Rick James

12/07/2015 01:05AM

Re: query with bad performance after migration to mysql 5.6

1,459

Øystein Grøvlen

12/09/2015 03:22AM

Re: query with bad performance after migration to mysql 5.6

1,899

walter verdelocco

12/09/2015 03:38AM

Re: query with bad performance after migration to mysql 5.6

1,268

Øystein Grøvlen

12/09/2015 04:21AM

Re: query with bad performance after migration to mysql 5.6

1,705

walter verdelocco

12/09/2015 06:31AM

Re: query with bad performance after migration to mysql 5.6

1,564

Øystein Grøvlen

12/09/2015 09:30AM

Re: query with bad performance after migration to mysql 5.6

1,604

walter verdelocco

12/09/2015 09:49AM

Re: query with bad performance after migration to mysql 5.6

1,219

walter verdelocco

12/09/2015 09:59AM

Re: query with bad performance after migration to mysql 5.6

1,428

Øystein Grøvlen

12/10/2015 04:37AM

Re: query with bad performance after migration to mysql 5.6

1,665

walter verdelocco

12/10/2015 07:39AM

Re: query with bad performance after migration to mysql 5.6

1,616

walter verdelocco

12/10/2015 08:09AM

Re: query with bad performance after migration to mysql 5.6

1,510

walter verdelocco

12/09/2015 03:44AM

Another Using temporary; Using filesort performance problem

2,738

Drew Tennenbaum

12/07/2015 06:37PM

Re: Another Using temporary; Using filesort performance problem

1,289

Drew Tennenbaum

12/07/2015 07:39PM

Re: Another Using temporary; Using filesort performance problem

1,132

Rick James

12/08/2015 08:52PM

Re: Another Using temporary; Using filesort performance problem

1,330

Drew Tanner

12/09/2015 10:31AM

Chinese data not appraing

2,273

Ra Nala

11/25/2015 04:42AM

Re: Chinese data not appraing

1,094

Rick James

11/29/2015 11:25AM

Re: Chinese data not appraing

1,290

Ra Nala

11/30/2015 01:24AM

Re: Chinese data not appraing

1,128

Rick James

12/01/2015 06:14PM

Re: Chinese data not appraing

1,119

Ra Nala

12/02/2015 01:12AM

Re: Chinese data not appraing

1,037

Rick James

12/07/2015 01:22AM

Re: Chinese data not appraing

1,281

Ra Nala

12/07/2015 10:24AM

Re: Chinese data not appraing

1,015

Rick James

12/08/2015 08:58PM

Re: Chinese data not appraing

1,053

Ra Nala

12/09/2015 01:04AM

Slow mysql query, copying to tmp table, using filesort

4,009

Aaron Bains

12/07/2015 04:50AM

Re: Slow mysql query, copying to tmp table, using filesort

1,129

Rick James

12/08/2015 08:59PM

Re: Slow mysql query, copying to tmp table, using filesort

1,583

Peter Brawley

12/08/2015 10:48PM

drop and recreate index in mysql DB

2,133

Ra Nala

11/25/2015 05:48AM

Re: drop and recreate index in mysql DB

1,228

Rick James

11/26/2015 02:31PM

Re: drop and recreate index in mysql DB

1,822

Ra Nala

11/27/2015 12:33AM

Re: drop and recreate index in mysql DB

2,009

Rick James

11/29/2015 11:38AM

Re: drop and recreate index in mysql DB

1,552

Ra Nala

11/30/2015 01:34AM

Single host configuration suggest

1,836

Yury Tsaregorodtsev

11/08/2015 01:50PM

Re: Single host configuration suggest

1,042

Øystein Grøvlen

11/17/2015 06:05AM

Re: Single host configuration suggest

860

Rick James

11/29/2015 12:20PM

Suddenly mysql server performance degraded

2,236

Devrishi Shandilya

11/05/2015 12:26AM

Re: Suddenly mysql server performance degraded

970

Peter Brawley

11/05/2015 11:41PM

Re: Suddenly mysql server performance degraded

1,234

Rick James

11/26/2015 10:01PM

Query optimization needed

2,451

Devrishi Shandilya

11/05/2015 01:42AM

Re: Query optimization needed

961

Peter Brawley

11/05/2015 11:40PM

Re: Query optimization needed

996

Devrishi Shandilya

11/06/2015 11:25PM

Re: Query optimization needed

1,043

Peter Brawley

11/08/2015 04:32PM

Re: Query optimization needed

1,015

Øystein Grøvlen

11/17/2015 05:43AM

Re: Query optimization needed

969

Rick James

11/26/2015 09:21PM

Foreman query optimization

2,261

Kyle Flavin

11/05/2015 04:15PM

Re: Foreman query optimization

986

Peter Brawley

11/05/2015 05:42PM

Re: Foreman query optimization

998

Kyle Flavin

11/05/2015 06:54PM

Re: Foreman query optimization

925

Peter Brawley

11/05/2015 11:19PM

Re: Foreman query optimization

1,084

Kyle Flavin

11/06/2015 11:58AM

Re: Foreman query optimization

963

Peter Brawley

11/06/2015 12:35PM

Re: Foreman query optimization

924

Kyle Flavin

11/06/2015 06:44PM

Re: Foreman query optimization

1,024

Rick James

11/26/2015 08:56PM

MySQL read/Write very slow in a table because of long blob columns

1,951

Mahesh Kakara

11/23/2015 11:31PM

Re: MySQL read/Write very slow in a table because of long blob columns

1,972

Øystein Grøvlen

11/25/2015 02:04AM

Re: MySQL read/Write very slow in a table because of long blob columns

1,298

Rick James

11/26/2015 02:49PM

Slow query on tmp table

1,556

Eric Colson

11/19/2015 09:02AM

Re: Slow query on tmp table

853

Peter Brawley

11/19/2015 12:08PM

Re: Slow query on tmp table

1,022

Rick James

11/26/2015 02:44PM

Slow Join Performance

1,634

Dereck E

10/06/2015 08:45AM

Re: Slow Join Performance

1,032

Rick James

10/06/2015 02:38PM

Re: Slow Join Performance

956

Dereck E

10/06/2015 03:42PM

Re: Slow Join Performance

986

Ra Nala

11/14/2015 10:24AM

Re: Slow Join Performance

807

Rick James

11/26/2015 02:39PM

This topic has been moved.: NOLOCK for multiple tables

32

Ra Nala

11/18/2015 03:51PM

distinct clause issue for 600000 records

2,034

11/10/2015 08:57AM

Re: distinct clause issue for 600000 records

1,127

Peter Brawley

11/11/2015 12:33PM

Re: distinct clause issue for 600000 records

1,012

Ra Nala

11/12/2015 12:49AM

Re: distinct clause issue for 600000 records

1,128

Ra Nala

11/12/2015 03:20AM

Re: distinct clause issue for 600000 records

1,026

Peter Brawley

11/12/2015 07:24PM

Re: distinct clause issue for 600000 records

1,235

Øystein Grøvlen

11/12/2015 07:08AM

Re: distinct clause issue for 600000 records

1,227

Ra Nala

11/12/2015 07:18AM

Re: distinct clause issue for 600000 records

1,280

Øystein Grøvlen

11/12/2015 07:43AM

Re: distinct clause issue for 600000 records

1,142

Ra Nala

11/13/2015 12:37AM

Re: distinct clause issue for 600000 records

1,266

Ra Nala

11/13/2015 12:45AM

Re: distinct clause issue for 600000 records

1,299

Øystein Grøvlen

11/13/2015 02:42AM

Re: distinct clause issue for 600000 records

1,300

Ra Nala

11/13/2015 05:56AM

Re: distinct clause issue for 600000 records

1,107

Øystein Grøvlen

11/13/2015 06:38AM

Re: distinct clause issue for 600000 records

1,193

Ra Nala

11/13/2015 07:15AM

Re: distinct clause issue for 600000 records

1,163

Øystein Grøvlen

11/13/2015 08:11AM

Re: distinct clause issue for 600000 records

1,124

Ra Nala

11/13/2015 11:35AM

Re: distinct clause issue for 600000 records

1,193

Øystein Grøvlen

11/16/2015 03:04AM

Re: distinct clause issue for 600000 records

1,126

Ra Nala

11/16/2015 04:12AM

Re: distinct clause issue for 600000 records

1,065

Øystein Grøvlen

11/16/2015 05:54AM

Values not inserting into MySQL Database table

10,658

Shan Abdussalam

11/11/2015 06:13AM

Re: Values not inserting into MySQL Database table

2,384

Peter Brawley

11/11/2015 12:28PM

Re: Values not inserting into MySQL Database table

1,383

Shan Abdussalam

11/11/2015 12:49PM

Re: Values not inserting into MySQL Database table

990

Øystein Grøvlen

11/12/2015 07:01AM

Re: Values not inserting into MySQL Database table

1,429

Shan Abdussalam

11/12/2015 07:06AM

Re: Values not inserting into MySQL Database table

1,153

Øystein Grøvlen

11/12/2015 07:11AM

Re: Values not inserting into MySQL Database table

1,348

Shan Abdussalam

11/12/2015 01:53PM

Re: Values not inserting into MySQL Database table

1,524

Peter Brawley

11/12/2015 07:21PM

does this "top-200" query do a table scan

1,873

Andrew Nuss

10/27/2015 05:50AM

Re: does this "top-200" query do a table scan

877

Peter Brawley

10/31/2015 12:22AM

Re: does this "top-200" query do a table scan

864

Andrew Nuss

10/31/2015 10:15AM

Re: does this "top-200" query do a table scan

834

Peter Brawley

10/31/2015 01:03PM

Re: does this "top-200" query do a table scan

911

Rick James

10/31/2015 05:51PM

Mysterious Cache Problem

1,808

Carlos Conti

10/29/2015 12:47AM

Re: Mysterious Cache Problem

881

Carlos Conti

10/29/2015 03:04AM

Re: Mysterious Cache Problem

824

Rick James

10/30/2015 06:16PM

Optimisation of a query using Group by and a Join

1,956

Alex Brown

10/19/2015 12:20PM

Re: Optimisation of a query using Group by and a Join

1,028

Peter Brawley

10/19/2015 02:10PM

Why is ORDER BY ASC is slow but ORDER DESC is fast ? and how can i fix it ?

2,914

Ronald Brown

10/03/2015 12:47AM

Re: Why is ORDER BY ASC is slow but ORDER DESC is fast ? and how can i fix it ?

1,532

Rick James

10/03/2015 08:01PM

Re: Why is ORDER BY ASC is slow but ORDER DESC is fast ? and how can i fix it ?

1,542

Ronald Brown

10/03/2015 08:34PM

Re: Why is ORDER BY ASC is slow but ORDER DESC is fast ? and how can i fix it ?

1,397

Rick James

10/05/2015 10:38AM

Re: Why is ORDER BY ASC is slow but ORDER DESC is fast ? and how can i fix it ?

1,540

Rick James

10/05/2015 10:41AM

Re: Why is ORDER BY ASC is slow but ORDER DESC is fast ? and how can i fix it ?

1,360

Ronald Brown

10/05/2015 10:50AM

Re: Why is ORDER BY ASC is slow but ORDER DESC is fast ? and how can i fix it ?

1,431

Ronald Brown

10/04/2015 08:28PM

Re: Why is ORDER BY ASC is slow but ORDER DESC is fast ? and how can i fix it ?

1,314

Ronald Brown

10/05/2015 12:26PM

Re: Why is ORDER BY ASC is slow but ORDER DESC is fast ? and how can i fix it ?

1,554

Rick James

10/06/2015 11:00AM

Re: Why is ORDER BY ASC is slow but ORDER DESC is fast ? and how can i fix it ?

3,260

Ronald Brown

10/06/2015 11:50PM

Re: Why is ORDER BY ASC is slow but ORDER DESC is fast ? and how can i fix it ?

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Re: Why is ORDER BY ASC is slow but ORDER DESC is fast ? and how can i fix it ?

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Rick James

10/09/2015 10:34PM

Too much time in Copy to Tmp Table

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Ricardo Manfrinato

10/01/2015 11:55AM

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10/05/2015 02:36PM

Re: Too much time in Copy to Tmp Table

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10/05/2015 02:48PM

Re: Too much time in Copy to Tmp Table

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