[wp-trac] [WordPress Trac] #58344: Connect to database on first query

[WordPress Trac]

#58344: Connect to database on first query
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 Reporter:  spacedmonkey  |       Owner:  (none)
     Type:  enhancement   |      Status:  new
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  Database      |     Version:
 Severity:  normal        |  Resolution:
 Keywords:                |     Focuses:  performance
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Comment (by dd32):

 One edge-case to consider is that currently WordPress will exit with a
 `Site Unavailable` type error when the DB is unavailable, with this
 potential change if the query isn't made until the Footer or mid-post-
 render the page may partially render before hitting a `wp_die()` condition
 (As you don't really want to return empty result-sets in the event of a
 DB-down scenario).

 However, plugins like HyperDB and others do delay the DB connect until a
 query is made, so this might not be an actual issue that needs
 consideration.

 That being said, If a persistent object cache is not in play, delaying
 until the first query will have very little change for most sites and
 scenario's.

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Ticket URL: <https://core.trac.wordpress.org/ticket/58344#comment:3>
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