Apologize for my poor English.
While I debugging slow queries on my Drupal 7.12 site, I found a query in locale module is very slow.
I think the reason is that some modules will filter/sort {locales_target} table by `language` field, however it's not indexed.
Please see this function for example:
http://api.drupal.org/api/drupal/includes%21locale.inc/function/_locale_...

$result = db_query("SELECT s.lid, s.source, s.context, t.translation FROM {locales_source} s INNER JOIN {locales_target} t ON s.lid = t.lid AND t.language = :language WHERE s.location LIKE '%.js%' AND s.textgroup = :textgroup", array(':language' => $language->language, ':textgroup' => 'default'));

Comments

droplet’s picture

droplet CreditAttribution: droplet commented
Version: 7.x-dev » 8.x-dev
Priority: Minor » Normal

There're indexes on both source & target language cols.

I think the main reason is here:

WHERE s.location LIKE '%.js%'

crifi’s picture

crifi CreditAttribution: crifi commented
Title: Add index for language field in {locales_target} » _locale_rebuild_js has bad database search performance
Category: bug » task
Issue tags: +performance issue

Change to better title

Tobias Xy’s picture

Tobias Xy CreditAttribution: Tobias Xy commented
Issue tags: +Needs backport to D7

Added the "Needs backport to D7" tag.
This query really(!!) slows down my site. Does anyone know a workaround? Quick and dirty would be ok, I guess...

Version: 8.0.x-dev » 8.1.x-dev

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apaderno’s picture

apaderno
he/him
Primary language Italian
Location Brescia, 🇮🇹 🇪🇺
CreditAttribution: apaderno as a volunteer commented
Version: 8.6.x-dev » 8.9.x-dev
Issue summary: View changes
Issue tags: -performance issue +Performance
ndobromirov’s picture

ndobromirov CreditAttribution: ndobromirov at FFW commented

There could be stale / invalid translation strings present in the database.
Things that were once in code, but have been changed and re-translated etc.
With time this data starts to clutter the DB and resulted in bigger and bigger database result sizes, returning translations that will likely never get used again.

As far as I know there is no automated way to clean-up stale translations from DB...
On top of that this query should have some kind of cache around it, so it should only happen once in a while and not all the time...

Version: 8.9.x-dev » 9.1.x-dev

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zuernBernhard’s picture

zuernBernhard CreditAttribution: zuernBernhard commented

Hm nothing happened here ? Currently run into the same thing still on D7 ...

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