WordPress/wp-admin
Gary Pendergast 210e23a63d Multisite: Improve performance of the upgrade page on large networks.
The query to select the next 5 blogs to upgrade was ordered by `registered`, which isn't indexed. This causes the query to table scan, which will be slow on networks with many blogs.

The query only needs to be ordered by something that won't change, so ordering by `blog_id` is a good replacement. `blog_id` is indexed, and it's the only column being returned, so MySQL is able to optimize for a fast index read.

Props fliespl.
Fixes #37612.


Built from https://develop.svn.wordpress.org/trunk@38229


git-svn-id: http://core.svn.wordpress.org/trunk@38170 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-08-09 11:39:36 +00:00
..
css About Page: Second pass for 4.6. 2016-08-07 12:48:30 +00:00
images Customize: Add a RTL version of "browser.png" for the site icon preview. 2016-07-05 11:32:29 +00:00
includes Dashboard: Don't escape widget titles in screen reader text. 2016-08-09 09:07:30 +00:00
js Updates: Add visual feedback when deleting themes/plugins. 2016-08-09 10:39:32 +00:00
maint I18N: Make the translator comment added in [37858] more explicit and consistent with other similar instances. 2016-07-04 13:10:30 +00:00
network Multisite: Improve performance of the upgrade page on large networks. 2016-08-09 11:39:36 +00:00
user Docs: Standardize hook docs in wp-admin/* to use third-person singular verbs per the inline documentation standards for PHP. 2016-05-22 18:01:30 +00:00
about.php About Page: Use a better version of the mp4 video. 2016-08-08 16:02:32 +00:00
admin-ajax.php TinyMCE, inline link: 2016-07-26 23:24:28 +00:00
admin-footer.php Docs: Improve usefulness of DocBlocks for ajax-actions.php functions introduced in 4.6. 2016-07-09 13:23:30 +00:00
admin-functions.php Docs: Use 3-digit, x.x.x-style semantic versioning for _doing_it_wrong(), _deprecated_function(), _deprecated_argument(), and _deprecated_file() throughout core. 2016-07-06 12:40:29 +00:00
admin-header.php Docs: Standardize DocBlock summaries for hooks that serve to "print" something to use third-person singular verbs. 2016-05-25 16:05:27 +00:00
admin-post.php Spelling: Standardize on "front end"/"back end" (noun) and "front-end"/"back-end" (adjective). 2016-02-25 12:53:27 +00:00
admin.php Bootstrap: Enhance core's memory limit handling. 2016-07-08 14:37:30 +00:00
async-upload.php Text Changes: Unify permission error messages. 2016-06-29 15:16:29 +00:00
comment.php Text Changes: Unify permission error messages. 2016-06-29 15:16:29 +00:00
credits.php About Page: First pass for 4.6 with strings (not yet translatable) and images (not CDN). 2016-08-03 19:54:48 +00:00
custom-background.php Docs: Standardize capitalization of Ajax throughout core documentation per the core spelling guide. 2016-07-10 00:51:30 +00:00
custom-header.php Text Changes: Unify permission error messages. 2016-06-29 15:16:29 +00:00
customize.php Text Changes: Unify permission error messages. 2016-06-29 15:16:29 +00:00
edit-comments.php Text Changes: Unify permission error messages. 2016-06-29 15:16:29 +00:00
edit-form-advanced.php Docs: Standardize references to "meta box" or "meta boxes" as two distinct words throughout core documentation per the core spelling guide. 2016-07-10 00:56:28 +00:00
edit-form-comment.php DOCS: Replace HTTP links with HTTPS. 2016-06-10 04:50:33 +00:00
edit-link-form.php Bump H3 headings to H2 on the legacy Link Manager screen for better accessibility. 2015-10-14 17:32:24 +00:00
edit-tag-form.php I18N: Add context and translator comments to Back to %s strings. 2016-06-14 21:51:28 +00:00
edit-tags.php Text Changes: Add a full stop to "Invalid taxonomy" and "Invalid term ID" strings, for consistency with similar post-related messages. 2016-07-17 16:15:34 +00:00
edit.php I18N: Combine two duplicate "Invalid post type" strings. 2016-07-17 16:05:31 +00:00
export.php Text Changes: Unify permission error messages. 2016-06-29 15:16:29 +00:00
freedoms.php About Page: First pass for 4.6 with strings (not yet translatable) and images (not CDN). 2016-08-03 19:54:48 +00:00
import.php Import: Enhance accessibility on the Import screen. 2016-07-17 15:32:30 +00:00
index.php Update/Install: Fix plugin updates from the details modal on the Dashboard. 2016-07-05 15:37:28 +00:00
install-helper.php Docs: Add missing descriptions for the $wpdb global in DocBlocks all the places. 2015-10-14 23:44:25 +00:00
install.php I18N: Remove <code> tags from translatable strings in wp-admin/install.php. 2016-02-24 01:22:26 +00:00
link-add.php Text Changes: Unify permission error messages. 2016-06-29 15:16:29 +00:00
link-manager.php Text Changes: Unify permission error messages. 2016-06-29 15:16:29 +00:00
link-parse-opml.php
link.php Docs: Standardize capitalization of Ajax throughout core documentation per the core spelling guide. 2016-07-10 00:51:30 +00:00
load-scripts.php Bootstrap/Load: Allow for ABSPATH to be defined outside of wp-load.php, e.g. in a script loaded via auto_prepend_file. 2016-04-14 17:53:28 +00:00
load-styles.php Bootstrap/Load: Allow for ABSPATH to be defined outside of wp-load.php, e.g. in a script loaded via auto_prepend_file. 2016-04-14 17:53:28 +00:00
media-new.php Text Changes: Unify permission error messages. 2016-06-29 15:16:29 +00:00
media-upload.php Text Changes: Unify permission error messages. 2016-06-29 15:16:29 +00:00
media.php Text Changes: Unify permission error messages. 2016-06-29 15:16:29 +00:00
menu-header.php Docs: Standardize hook docs in wp-admin/* to use third-person singular verbs per the inline documentation standards for PHP. 2016-05-22 18:01:30 +00:00
menu.php Docs: Standardize on 'backward compatibility/compatible' nomenclature in core inline docs. 2016-05-13 18:41:31 +00:00
moderation.php
ms-admin.php
ms-delete-site.php Multisite: Use hash_equals() when comparing hashes to mitigate timing attacks. 2016-07-10 19:43:28 +00:00
ms-edit.php
ms-options.php
ms-sites.php
ms-themes.php
ms-upgrade-network.php
ms-users.php
my-sites.php Text Changes: Unify permission error messages. 2016-06-29 15:16:29 +00:00
nav-menus.php Text Changes: Unify permission error messages. 2016-06-29 15:16:29 +00:00
network.php Text Changes: Unify permission error messages. 2016-06-29 15:16:29 +00:00
options-discussion.php Text Changes: Unify permission error messages. 2016-06-29 15:16:29 +00:00
options-general.php Multisite: Add a nonce to the "Cancel" URL when changing a site's admin email. 2016-07-07 17:13:27 +00:00
options-head.php Docs: Standardize on 'backward compatibility/compatible' nomenclature in core inline docs. 2016-05-13 18:41:31 +00:00
options-media.php Text Changes: Unify permission error messages. 2016-06-29 15:16:29 +00:00
options-permalink.php Permalinks: Rename $usingpi to $using_index_permalinks for clarity. 2016-07-16 12:46:29 +00:00
options-reading.php Text Changes: Unify permission error messages. 2016-06-29 15:16:29 +00:00
options-writing.php Text Changes: Unify permission error messages. 2016-06-29 15:16:29 +00:00
options.php Multisite: Use hash_equals() when comparing hashes to mitigate timing attacks. 2016-07-10 19:43:28 +00:00
plugin-editor.php Text Changes: Unify permission error messages. 2016-06-29 15:16:29 +00:00
plugin-install.php Plugins: Use install_plugins_upload action to print the upload form. 2016-07-31 18:11:29 +00:00
plugins.php Text Changes: After [37297], replace two more instances of "WordPress.org Plugin Directory" with "WordPress Plugin Directory". 2016-07-17 12:50:43 +00:00
post-new.php I18N: Combine two duplicate "Invalid post type" strings. 2016-07-17 16:05:31 +00:00
post.php Text Changes: Unify permission error messages. 2016-06-29 15:16:29 +00:00
press-this.php Text Changes: Unify permission error messages. 2016-06-29 15:16:29 +00:00
profile.php
revision.php Revisions: Allow autosaves to be restored when revisions are disabled. 2016-07-08 01:16:31 +00:00
setup-config.php Setup: Sanity check for invalid table prefixes. 2016-05-27 01:54:28 +00:00
term.php On term.php, use $taxnow when fetching currently edited term. 2016-07-16 18:37:30 +00:00
theme-editor.php Text Changes: Unify permission error messages. 2016-06-29 15:16:29 +00:00
theme-install.php I18N: After [38057], consistently use a context for other instances of Activate %s, Network Activate %s, and Delete %s strings. 2016-07-16 23:20:29 +00:00
themes.php I18N: After [38057], consistently use a context for other instances of Activate %s, Network Activate %s, and Delete %s strings. 2016-07-16 23:20:29 +00:00
tools.php Bump H3 headings to H2 on Tools screen for better accessibility. 2015-08-31 03:32:21 +00:00
update-core.php Text Changes: Unify permission error messages. 2016-06-29 15:16:29 +00:00
update.php Text Changes: Unify permission error messages. 2016-06-29 15:16:29 +00:00
upgrade-functions.php Docs: Use 3-digit, x.x.x-style semantic versioning for _doing_it_wrong(), _deprecated_function(), _deprecated_argument(), and _deprecated_file() throughout core. 2016-07-06 12:40:29 +00:00
upgrade.php Install/Upgrade: Keep indexing bots away until a site is ready to be seen. 2015-12-08 21:56:27 +00:00
upload.php Text Changes: Remove duplicate string, use the one we already have. 2016-07-04 21:48:28 +00:00
user-edit.php Users: Check zxcvbn is defined before calling. 2016-07-01 12:45:29 +00:00
user-new.php Users: Update help text for user-new.php to remove reference to sending passwords via email. 2016-07-14 21:51:32 +00:00
users.php Text Changes: Unify permission error messages. 2016-06-29 15:16:29 +00:00
widgets.php Text Changes: Unify permission error messages. 2016-06-29 15:16:29 +00:00