We're using InnoDB > 5.7 so full text search is definitely supported -
but also we use Elastic search anyway, does this mean we don't even need
the searchindex table?


On 28/07/19 1:07 PM, Manuel Arostegui wrote:
> On Sat, Jul 27, 2019 at 4:03 PM Bartosz Dziewoński <matma....@gmail.com>
> wrote:
>
>> The 'searchindex' table uses MyISAM because until recently, InnoDB did
>> not support fulltext indexes, which MediaWiki uses for the search. All
>> other tables should use InnoDB.
>>
>> According to https://stackoverflow.com/a/9397060 fulltext indexes are
>> available on InnoDB since MySQL 5.6.4. If you're running that version or
>> newer, it is possible you could use InnoDB for that table, but as far as
>> I know no one has tried it before.
>>
>> According to https://www.mediawiki.org/wiki/Compatibility#Database
>> MediaWiki only requires MySQL 5.5.8, so we can't change that in our
>> table definitions (yet).
>>
>> No idea about the 'math' table.
>
> The math table isn't used, and it is being dropped in production:
> https://phabricator.wikimedia.org/T196055
>
> Regarding MyISAM vs InnoDB: Always use InnoDB unless you have a very good
> reason to use MyISAM (like the one mentioned about full-text indexes).
>
> Cheers
> Manuel.
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