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MySQL Thoughts

Monday, May 17, 2010. Poor Man's Profiler using Solaris' pstack. Recently I was working with the output of pstack. From a hung MySQL server and wanted to use Poor Man's Profiler. In order to combine stack traces. Unfortunately, the awk magic expects the output from gdb's thread apply all bt output. Thread 10 (Thread 0xa644db90 (LWP 26275) :. 0 0xb7f47410 in kernel vsyscall (). 1 0xb7f33b1a in do sigwait () from /lib/tls/i686/cmov/libpthread.so.0. 3 0x081cc4fc in signal hand (). 3 0x081d1ef3 in main ().

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Monday, May 17, 2010. Poor Man's Profiler using Solaris' pstack. Recently I was working with the output of pstack. From a hung MySQL server and wanted to use Poor Man's Profiler. In order to combine stack traces. Unfortunately, the awk magic expects the output from gdb's thread apply all bt output. Thread 10 (Thread 0xa644db90 (LWP 26275) :. 0 0xb7f47410 in kernel vsyscall (). 1 0xb7f33b1a in do sigwait () from /lib/tls/i686/cmov/libpthread.so.0. 3 0x081cc4fc in signal hand (). 3 0x081d1ef3 in main ().

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1 mysql thoughts

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3 pstack output

4 awk

5 posted by

6 harrison

7 2 comments

8 labels awk

9 mysql

10 semi sync replication testing

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MySQL Thoughts | harrison-fisk.blogspot.com Reviews

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Monday, May 17, 2010. Poor Man's Profiler using Solaris' pstack. Recently I was working with the output of pstack. From a hung MySQL server and wanted to use Poor Man's Profiler. In order to combine stack traces. Unfortunately, the awk magic expects the output from gdb's thread apply all bt output. Thread 10 (Thread 0xa644db90 (LWP 26275) :. 0 0xb7f47410 in kernel vsyscall (). 1 0xb7f33b1a in do sigwait () from /lib/tls/i686/cmov/libpthread.so.0. 3 0x081cc4fc in signal hand (). 3 0x081d1ef3 in main ().

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MySQL Thoughts: Semi-sync Replication Testing

http://harrison-fisk.blogspot.com/2010/03/semi-sync-replication-testing.html

Tuesday, March 2, 2010. I have recently been trying out semisynchronous replication. This is a new feature added in MySQL 5.5 based on the original google patch. Installing was very simple and has been covered elsewhere. In detail. Suffice to say it was relatively simple to do. While test I was a bit surprised by some behavior I saw that turned out correct. What I wanted to examine what was semi-synchronous actually does and use cases for it. The transaction is actually committed to disk. This means that...

2

MySQL Thoughts: January 2009

http://harrison-fisk.blogspot.com/2009_01_01_archive.html

Thursday, January 29, 2009. XA and Persistent InnoDB Locks. Recently a customer mentioned that they were seeing corruption rarely when they copied InnoDB files using LVM to setup a new slave. Investigating further, it turns out that replication would start, but would then hit a lock wait timeout. This locking issue occurred across restarts causing replication to always fail. They would solve this by taking a new LVM snapshot and resetting it up. This is a classic case of an XA transaction. In addition, y...

3

MySQL Thoughts: My Favorite New Feature of MySQL 5.1: Less InnoDB Locking

http://harrison-fisk.blogspot.com/2009/02/my-favorite-new-feature-of-mysql-51.html

Thursday, February 19, 2009. My Favorite New Feature of MySQL 5.1: Less InnoDB Locking. The first one is the new auto increment locking for InnoDB. There is a good article which talks about this here. And a large section the in the manual. So to summarize, to pretty much completely remove auto increment locking in InnoDB, you will need to set both innodb autoinc lock mode=2 and binlog format=row. DELETE FROM tbl WHERE key. This also means that if new items are added to the database, InnoDB does not guara...

4

MySQL Thoughts: May 2010

http://harrison-fisk.blogspot.com/2010_05_01_archive.html

Monday, May 17, 2010. Poor Man's Profiler using Solaris' pstack. Recently I was working with the output of pstack. From a hung MySQL server and wanted to use Poor Man's Profiler. In order to combine stack traces. Unfortunately, the awk magic expects the output from gdb's thread apply all bt output. Thread 10 (Thread 0xa644db90 (LWP 26275) :. 0 0xb7f47410 in kernel vsyscall (). 1 0xb7f33b1a in do sigwait () from /lib/tls/i686/cmov/libpthread.so.0. 3 0x081cc4fc in signal hand (). 3 0x081d1ef3 in main ().

5

MySQL Thoughts: January 2010

http://harrison-fisk.blogspot.com/2010_01_01_archive.html

Thursday, January 14, 2010. State of MySQL Search. Recently I took part in the first meeting of the MySQL Search Team. You can read more about the team here. My task was to represent the customer interests regarding fulltext search. My report had a few main points which I made:. MyISAM only: Limits the usefulness in many very busy environments due to table level locking and crash safety. Etc are very good at what they do, and are normally faster and more fully featured compared to MySQL FTS. The big ...

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elco.crsndoo.com

2012 |

http://elco.crsndoo.com/wordpress/2012/01/2012

Gde kupiti komponente u Srbiji, ko šalje, ko ima, ko laže…. Sunday, January 1st, 2012 Ostalo. Драги пријатељи и колеге, СРЕТНА ВАМ НОВА 2012 ГОДИНА. Dear friends and colleagues, HAPPY NEW 2012. Mail (will not be published). Tipping – when, how much. Zoran A. Šcepanovic. Powered by Google Translate. Theme design by WP Themes.

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HAKKO 907 i kompatibilne lemilice |

http://elco.crsndoo.com/wordpress/2011/09/hakko-907-i-kompatibilne-lemilice

Gde kupiti komponente u Srbiji, ko šalje, ko ima, ko laže…. HAKKO 907 i kompatibilne lemilice. Wednesday, September 14th, 2011 SID. Kao što spomenuh, moj kontroler. HAKKO ima manju termalnu masu (vrh je lakši) i kontaktna površina između grejača i vrha je manja ali HAKKO lemilica bez problema održava temperaturu vrha stabilnom; čak za nijansu stabilnije nego Solomon. Top to bottom: Noname, Quick, Hakko original. 13 Comments to 'HAKKO 907 i kompatibilne lemilice'. December 13, 2011. Ako ti nije problem:.

fabmetheus.crsndoo.com

MySQL

http://fabmetheus.crsndoo.com/index.php?all=true

Just another MySQL blog ali na srpskom. Oracle Linux – free update i errata od sada pa na dalje i ubuduce. Http:/ www.oracle.com/us/corporate/press/1563775. Https:/ blogs.oracle.com/wim/entry/lots of goodies. Https:/ blogs.oracle.com/linux/entry/free updates and errata for. Http:/ www.oracle.com/us/technologies/linux/OracleLinuxSupport/index.html. Http:/ www.oracle.com/us/technologies/linux/competitive-335546.html. Http:/ www.oracle.com/us/media/calculator/linuxtco/index.html. VN:F [1.9.22 1171]. Шиљим ј...

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soldering |

http://elco.crsndoo.com/wordpress/tag/soldering

Gde kupiti komponente u Srbiji, ko šalje, ko ima, ko laže…. Saturday, April 28th, 2012 Ostalo. Ррва справа коју сам добавио је нека кинеска “лупа за на главу”, лако набављива у продавницама које продају електронику код нас, делује ок на први поглед. Овај примерак је 8PK-MA003 или MG81007 (не пише ништа на њему а не сећам се шта сам тачно наручио, мислим да је у питању MG81007 но нисам сигуран. Справа ради ок са цвикама, дакле сочиво је позиционирано далеко од очију, носач се ослања на чело. Закључак: ја ...

elco.crsndoo.com

SOLOMON SL10 SL20 SL30 HQ10 HQ30 |

http://elco.crsndoo.com/wordpress/2011/09/solomon-sl10-sl20-sl30-hq10-hq30

Gde kupiti komponente u Srbiji, ko šalje, ko ima, ko laže…. SOLOMON SL10 SL20 SL30 HQ10 HQ30. Tuesday, September 13th, 2011 SID. Moj kontroler za lemilicu. Ume da radi sa 2 vrste lemilica. Sa onima koje imaju senzor u obliku K-tip termopara i onima koje imaju PTC senzor. Solomon lemilice imaju K-tip termopar koji daje mogućnost čitanja temperature grejača. Solomon soldering iron pinout. ESD pin preko 1M (megaom) otpornika vežite na uzemljenje. Grejač je 48W predviđen da radi sa 24VAC. September 24, 2011.

mysqlinsights.blogspot.com

Mysql Insights: NULL fields in Mysql row format

http://mysqlinsights.blogspot.com/2009/01/null-fields-in-mysql-row-format.html

Cool things I have learned or noticed about Mysql and Mysql Internals. Thursday, January 29, 2009. NULL fields in Mysql row format. There is a table object that is part of the storage engine handler class:. Struct st table *table;. This table object contains a field member, which is an array of fields in the table:. Field * field;. Any individual field within a table has the following members:. Uchar* null ptr;. Uchar null bit;. If (table- field[0]- null ptr and table- field[0]- null bit){. Not as tricky...

mysqlinsights.blogspot.com

Mysql Insights: August 2009

http://mysqlinsights.blogspot.com/2009_08_01_archive.html

Cool things I have learned or noticed about Mysql and Mysql Internals. Monday, August 31, 2009. Oprofile for IO bound apps. I am using Oprofile to look into the performance of a Mysql Storage engine. Upon reading further into the oprofile docs I find:. OProfile is oriented to finding problems with CPU-limited processes. OProfile does not identify processes that are asleep because they are waiting on locks or for some other event to occur (for example an I/O device to finish an operation).".

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harrison-fisk.blogspot.com

MySQL Thoughts

Monday, May 17, 2010. Poor Man's Profiler using Solaris' pstack. Recently I was working with the output of pstack. From a hung MySQL server and wanted to use Poor Man's Profiler. In order to combine stack traces. Unfortunately, the awk magic expects the output from gdb's thread apply all bt output. Thread 10 (Thread 0xa644db90 (LWP 26275) :. 0 0xb7f47410 in kernel vsyscall (). 1 0xb7f33b1a in do sigwait () from /lib/tls/i686/cmov/libpthread.so.0. 3 0x081cc4fc in signal hand (). 3 0x081d1ef3 in main ().

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