Comments on: Online ALTER TABLE now available in openark kit http://code.openark.org/blog/mysql/online-alter-table-now-available-in-openark-kit Blog by Shlomi Noach Thu, 09 Sep 2010 18:52:58 +0000 hourly 1 http://wordpress.org/?v=3.0.1 By: Jon d http://code.openark.org/blog/mysql/online-alter-table-now-available-in-openark-kit/comment-page-1#comment-3459 Jon d Sun, 23 Aug 2009 20:27:34 +0000 http://code.openark.org/blog/?p=629#comment-3459 Thanks for the tool im using it now... Ive been doing similar things myself manually, first create schema, then do a first pass, then copy the remaining rows. Then rename/drop. Great script. Thanks for the tool im using it now… Ive been doing similar things myself manually, first create schema, then do a first pass, then copy the remaining rows. Then rename/drop. Great script.

]]> By: shlomi http://code.openark.org/blog/mysql/online-alter-table-now-available-in-openark-kit/comment-page-1#comment-1526 shlomi Thu, 09 Apr 2009 16:04:38 +0000 http://code.openark.org/blog/?p=629#comment-1526 Mohammad, please do, I will appreciate any feedback Regards Mohammad,
please do, I will appreciate any feedback

Regards

]]> By: Mohammad Lahlouh http://code.openark.org/blog/mysql/online-alter-table-now-available-in-openark-kit/comment-page-1#comment-1525 Mohammad Lahlouh Thu, 09 Apr 2009 11:44:31 +0000 http://code.openark.org/blog/?p=629#comment-1525 Great work, I interest in test it Great work, I interest in test it

]]> By: Pythian Group - Blog http://code.openark.org/blog/mysql/online-alter-table-now-available-in-openark-kit/comment-page-1#comment-1325 Pythian Group - Blog Fri, 27 Mar 2009 17:18:32 +0000 http://code.openark.org/blog/?p=629#comment-1325 [...] Shlomi Noach has some news about a MySQL toolkit. No, not that one. openark. The news is: online ALTER TABLE is now available in openark kit. [...] [...] Shlomi Noach has some news about a MySQL toolkit. No, not that one. openark. The news is: online ALTER TABLE is now available in openark kit. [...]

]]> By: shlomi http://code.openark.org/blog/mysql/online-alter-table-now-available-in-openark-kit/comment-page-1#comment-1323 shlomi Fri, 27 Mar 2009 16:29:22 +0000 http://code.openark.org/blog/?p=629#comment-1323 @flytox, I'm actually running this on live servers (my own...) and find that load average does not increase significantly. What's most affected is slave lag. Using the correct <strong>--sleep-time</strong> allows for slaves for better follow ups. @flytox,

I’m actually running this on live servers (my own…) and find that load average does not increase significantly. What’s most affected is slave lag. Using the correct –sleep-time allows for slaves for better follow ups.

]]> By: flytox http://code.openark.org/blog/mysql/online-alter-table-now-available-in-openark-kit/comment-page-1#comment-1321 flytox Fri, 27 Mar 2009 15:35:55 +0000 http://code.openark.org/blog/?p=629#comment-1321 Interesting work. I'm curious to check the generated overhead while altering the table. Interesting work. I’m curious to check the generated overhead while altering the table.

]]> By: shlomi http://code.openark.org/blog/mysql/online-alter-table-now-available-in-openark-kit/comment-page-1#comment-1273 shlomi Wed, 25 Mar 2009 05:38:12 +0000 http://code.openark.org/blog/?p=629#comment-1273 @Arjen Disk space - you get the same issue when doing normal ALTER TABLE, either directly, or with M-M replication. At any case you're spending disk space (unless you dump+import, which is a pain in itself) @Arjen
Disk space – you get the same issue when doing normal ALTER TABLE, either directly, or with M-M replication. At any case you’re spending disk space (unless you dump+import, which is a pain in itself)

]]> By: shlomi http://code.openark.org/blog/mysql/online-alter-table-now-available-in-openark-kit/comment-page-1#comment-1272 shlomi Wed, 25 Mar 2009 05:37:01 +0000 http://code.openark.org/blog/?p=629#comment-1272 @Arjen Not so. There will only be two tables: the original one, and the ALTERed one. See, I create the ALTERed table as empty, and fill it on the fly. This is why you only have two copies - not worse than the "real" ALTER TABLE, which builds a copy - while blocking your entire table. @Arjen
Not so. There will only be two tables: the original one, and the ALTERed one.
See, I create the ALTERed table as empty, and fill it on the fly. This is why you only have two copies – not worse than the “real” ALTER TABLE, which builds a copy – while blocking your entire table.

]]> By: Arjen Lentz http://code.openark.org/blog/mysql/online-alter-table-now-available-in-openark-kit/comment-page-1#comment-1263 Arjen Lentz Tue, 24 Mar 2009 21:59:52 +0000 http://code.openark.org/blog/?p=629#comment-1263 While useful in some cases, the prob with this is that for big tables the process is still quite painful and in fact made worse; with this process, at some point there'll be 3 copies of the data (original table, the extra one, and the newly written one while alter table is doing its thing). For large tables the issue is often both diskspace as well as disk I/O. While useful in some cases, the prob with this is that for big tables the process is still quite painful and in fact made worse; with this process, at some point there’ll be 3 copies of the data (original table, the extra one, and the newly written one while alter table is doing its thing).
For large tables the issue is often both diskspace as well as disk I/O.

]]> By: New in openark kit: online alter table | openark forge http://code.openark.org/blog/mysql/online-alter-table-now-available-in-openark-kit/comment-page-1#comment-1260 New in openark kit: online alter table | openark forge Tue, 24 Mar 2009 18:10:41 +0000 http://code.openark.org/blog/?p=629#comment-1260 [...] is a new utility which allows for non-blocking ALTER TABLE operations. See announcement for more [...] [...] is a new utility which allows for non-blocking ALTER TABLE operations. See announcement for more [...]

]]>