Comments on: MySQL and partitioning tables with millions of rows http://chrismoos.com/2010/01/31/mysql-partitioning-tables-with-millions-of-rows/ developer by day, developer by night Sat, 17 Jul 2010 19:16:08 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: uberVU - social comments http://chrismoos.com/2010/01/31/mysql-partitioning-tables-with-millions-of-rows/comment-page-2/#comment-12638 uberVU - social comments Mon, 01 Feb 2010 07:47:00 +0000 http://chrismoos.com/?p=644#comment-12638 <strong>Social comments and analytics for this post...</strong> This post was mentioned on Twitter by xoclipse: #mysql #partitioning http://chrismoos.com/2010/01/31/mysql-partitioning-tables-with-millions-of-rows/... Social comments and analytics for this post…

This post was mentioned on Twitter by xoclipse: #mysql #partitioning http://chrismoos.com/2010/01/31/mysql-partitioning-tables-with-millions-of-rows/...

]]> By: Saiyine http://chrismoos.com/2010/01/31/mysql-partitioning-tables-with-millions-of-rows/comment-page-1/#comment-12523 Saiyine Sun, 31 Jan 2010 21:09:55 +0000 http://chrismoos.com/?p=644#comment-12523 Uhm the dates of the comments don't seem to work very well. You should order your comments by id, not by date. Or what it's going on here? Uhm the dates of the comments don’t seem to work very well. You should order your comments by id, not by date. Or what it’s going on here?

]]> By: Saiyine http://chrismoos.com/2010/01/31/mysql-partitioning-tables-with-millions-of-rows/comment-page-1/#comment-12522 Saiyine Sun, 31 Jan 2010 21:07:00 +0000 http://chrismoos.com/?p=644#comment-12522 dr_strangelove: with mysql, only if the index is fits in memory. Also, he doesn't "use" a table lock, his database engine does. dr_strangelove: with mysql, only if the index is fits in memory. Also, he doesn’t “use” a table lock, his database engine does.

]]> By: Chris Moos http://chrismoos.com/2010/01/31/mysql-partitioning-tables-with-millions-of-rows/comment-page-1/#comment-12508 Chris Moos Sun, 31 Jan 2010 20:33:30 +0000 http://chrismoos.com/?p=644#comment-12508 Adam: It looks like that is only supported if you are using the InnoDB engine...unfortunately I'm using MyISAM...but I'm sure I would benefit from InnoDB (and MVCC) + partitioning. Adam:

It looks like that is only supported if you are using the InnoDB engine…unfortunately I’m using MyISAM…but I’m sure I would benefit from InnoDB (and MVCC) + partitioning.

]]> By: Adam http://chrismoos.com/2010/01/31/mysql-partitioning-tables-with-millions-of-rows/comment-page-1/#comment-12507 Adam Sun, 31 Jan 2010 20:31:33 +0000 http://chrismoos.com/?p=644#comment-12507 Why would a select need an exclusive lock on the table? I don't know much about MySQL in particular, but you should make sure you have MVCC turned on. With MVCC you can write to that table while doing a table scan. Other users might see a slowdown, but they wouldn't block until the query finished. Newer versions of PostgreSQL (which does MVCC) even have a feature that allow concurrent large table scans share disk reads. Why would a select need an exclusive lock on the table? I don’t know much about MySQL in particular, but you should make sure you have MVCC turned on. With MVCC you can write to that table while doing a table scan. Other users might see a slowdown, but they wouldn’t block until the query finished. Newer versions of PostgreSQL (which does MVCC) even have a feature that allow concurrent large table scans share disk reads.

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