Visits website pages to warm (create) the cache if you have any caching solutions configured.

Settings

• Configure cache warming entry points and the depth of the warming;
• Add all public site posts as entry points;
• Add entry point sites sitemaps as entry points;
• Select which types of assets to load, with 4 checkboxes: scripts, styles, images, fonts;
• Set custom URL params (?foo=bar);
• Set custom user agent;
• Set custom request headers;
• Set custom cookies;
• Set connection timeout;
• Set speed limit (pages to visit per minute);
• Autorun Interval: to run the warming each N minutes;
• Exclude pages (by substring or regex);
• Rewrite URLs to HTTPS;
• Visit pages second time without custom URL params (if they are set);
• Warm-up posts (on their publication and edit (Can be seen in Logs -> Triggered)):
  • Set custom posts warming interval.
• Store warm-up queues in MySQL so scheduled work is safe across interchangeable web nodes.

Additional

• Adds a graph to your dashboard with page load time before and after the warming (2 lines) per day.
• Cleans up Action Scheduler log after itself (older than 30 days for failed actions, and older than 2 days for completed actions).

External services

• Connect to paid service for warming from external global servers.

Run from code

• Start: \Cache_Warmer\AJAX::start_warm_up( false );
• Stop: \Cache_Warmer\AJAX::stop_warm_up( false );

Run from WP CLI

• Start: wp cache-warmer start
• Stop: wp cache-warmer stop

Required PHP extensions

• json
• simplexml (optional)

Bug reports / Questions / Suggestions

[email protected]

1.4.15 2026-11-03

• Recover non-positive saved warm-up speed limits from the current site setting before processing. Preserve valid run limits, queued visits and metadata recovery backups.

1.4.14 2026-11-03

• Automatically recover recognized truncated run metadata using current site settings only for missing fields. Preserve complete settings, queued URLs and an exact backup of the damaged data.

1.4.13 2026-11-03

• Explain unsupported metadata recovery with bounded structural diagnostics, without exposing stored request configuration or changing the retained queue.

1.4.12 2026-11-03

• Prevent large warm-up configurations from being truncated by widening metadata storage and rejecting failed JSON encoding or unsafe writes.
• Add guarded administrator recovery for truncated request history, preserving the original metadata and all queued visits without resetting the warm-up.
• Retain recovery backups during automatic cleanup and prevent incomplete request history from replacing a complete reusable crawl.
• Fix timeout option declarations during uninstall when the plugin is inactive.

1.4.11 2026-11-03

• Add administrator diagnostics for warm-up configuration size, checksum, JSON errors and database column capacity without exposing configuration contents.

1.4.10 2026-11-03

• Restore the documented 15-second HTTP timeout for retained warm-ups with missing or zero timeouts, preserving valid configured limits and queued work.
• Verify delayed responses and successful retries through the real WordPress HTTP transport while retaining failure history.

1.4.9 2026-11-03

• Recover missing legacy warm-up start dates from the existing run identity without resetting queued visits.
• Persist identity recovery before retrying so subsequent failures retain bounded backoff, including interrupted finalization.

1.4.8 2026-11-02

• Preserve historical zero/empty behavior for retained warm-ups with missing or null numeric settings and discovery agents.
• Add bounded, redacted active-run configuration diagnostics without exposing cookies, headers or user-agent values.

1.4.7 2026-11-02

• Normalize legacy optional warm-up settings before requests and canonical or asset discovery, preserving queued URLs and configured values.
• Keep interrupted work recoverable with delayed worker retries and preserve malformed metadata for investigation.
• Report the active warm-up instead of historical scheduler failures, and keep progress refreshing during recovery.

1.4.6 2026-11-02

• Fix queued warm-ups with missing or null optional request headers while preserving configured headers and pending visits.

1.4.5 2026-11-02

• Fix queued warm-ups failing when optional cookie metadata is missing or null, while preserving configured cookies.
• Recover missing warm-up list containers during database upgrades without deleting their logs; retain incomplete recovery data separately from runnable work.

1.4.4 2026-10-30

• Fix large legacy queue upgrades exceeding the database packet limit by storing seed manifests in bounded chunks.
• Preserve complete pending queues across interrupted transfers and verify their integrity before resuming.
• Stop retrying non-collision SQL failures and reclaim seed chunks after successful publication.

1.4.3 2026-10-30

Bugfixes

• Update bundled WP Plugins Core to 0.1.58 with bounded notification retries and recovery; notification fetching remains disabled in this plugin.

1.4.2 2026-10-29

Bugfixes

• Recover a missing database table when the saved migration checkpoint is already ahead, preserving surviving tables and retry progress.
• Keep the main administration page and migration diagnostics accessible while a database upgrade or status read is unavailable.

1.4.1 2026-10-13

Bugfixes

• Preserve pending warm-up work and recovery state when queue discovery, persistence, or scheduler cleanup fails.
• Update shared settings and scheduler recovery support to WP Plugins Core 0.1.57.

1.4.0 2026-08-17

Enhancements

• Store active warming queues in indexed database rows instead of large serialized options.
• Make warm-up processing recoverable across PHP requests and prioritize scheduled warming over post-triggered warming.
• Add a unified Codeception and wp-browser regression suite covering queues, migrations, HTTP outcomes, content discovery, scheduling, external warming, post-triggered warming, reporting, options, and AJAX authorization.

Bugfixes

• Prevent overlapping workers from processing the same queued page.
• Retry failed pages once and preserve scheduled and post-triggered queues independently.
• Isolate every post-triggered batch so repeated edits cannot suppress later warming requests.
• Make manual cancellation compatible with strict SQL modes and resume independent triggered queues afterward.
• Reconcile missing columns and indexes on legacy log tables.
• Keep external-warmer logging compatible with the database-backed queue.
• Correctly recognize extensionless pages inside dotted directory names.
• Parse complete CSS @import URLs instead of truncating them to one character.
• Record newly discovered failed URLs as failures when no pending queue row exists.

Security

• Require administrator capability checks in addition to nonces for every plugin AJAX action.
• Update Guzzle to the patched release covered by the current security advisories.

1.3.11 2026-07-15

Security

• Update Guzzle dependencies to prevent URL credentials from reaching origin servers.

1.3.10 2026-07-03

Bugfixes

• Fix “_load_textdomain_just_in_time was called incorrectly” notice by loading translations on the init hook (required since WP 6.7).

1.3.9 2026-06-25

Compatibility

• Added support for WordPress 7.0.0.

1.3.8 2024-11-18

Bugfixes

• Fix UI rendering bugs.

1.3.7 2024-11-02

Bugfixes

• Fix interval scheduling issue.

1.3.6 2024-10-21

Enhancements

• Add WP-CLI support.

1.3.5 2024-10-20

Bugfixes

• Fix fatal error on plugin update.

1.3.4 2024-10-19

Enhancements

• Add support for WP CLI.

Bugfixes

• Fix scheduled intervals.

1.3.3 2024-10-05

Enhancements

• Instead for checking for intervals in constructors on every page load, check for them only once on plugin activation. Add a button and other interval (which is scheduled in constructor) to fix any missing intervals.

1.3.2 2024-09-29

Bugfixes

• Warming start bug fix.

1.3.1 2024-09-29

Enhancements

• Add support for external warmer – simply for each page visit, and with the intervals.
• Added functionality to start / stop the warming from code (or with WP CLI with “wp eval”).

Bugfixes

• Fix the warming interval stuck bug.

1.3.0 2024-06-24

Enhancements

• Speed up warmings (optimization).

Bugfixes

• Fix stuck object cache bug.

1.2.5 2024-06-23

Bugfixes

• Fix stuck object cache bug.

1.2.4 2024-06-23

Changes

• Do not schedule notifications fetch action.

1.2.3 2024-06-05

Bugfixes

• Fix Action Scheduler bug.

1.2.2 2024-05-26

Bugfixes

• Fix Fatal Error with explode on Windows by using DIRECTORY_SEPARATOR constant.

1.2.1 2024-05-02

Enhancements

• Use standard Action Scheduler interval.
• Update WP-Plugins-Core.

1.2.0 2024-04-23

Bugfixes

• Fix the unscheduled warming with empty data (which results in PHP Warnings).

1.1.9 2024-03-12

Bugfixes

• Fix the “depth” setting.

1.1.8 2024-03-11

Bugfixes

• Fix the sitemaps parsing (didn’t visit them at all previously).
• Fix ID for “external warmer” setting fields.
• Fix “speed limit” bug.

1.1.7 2024-02-28

Bugfixes

• Fix settings import button color.
• Fix a bug when the scheduling time is drifting.
• Fix the wrong warming “Duration”.
• Fix “speed limit” bug.

Enhancements

• Warm sitemaps and posts first (with prio), and only then entry points.

1.1.6 2024-01-14

Bugfixes

• Fix “Request: DOMDocument::loadHTML(): Argument #1 ($source) must not be empty”.

1.1.5 2024-01-13

Enhancements

• Update default User-Agent to the newer version of Chrome.
• Increase URL params limit from 5 to 50.
• Add a setting to specify custom request headers.
• Add a setting to visit pages second time without custom cookies (when they are set).
• Improve canonicals logic, to add a log icon with the canonical to the warm-up log; and if ‘skip pages with warmed canonical’ setting is off, then also warm the canonical page immediately.

Bugfixes

• Fix table cells style (overflow: auto for all).
• Logs in the site’s timezone.
• Fix a bug when resetting settings does not change posts warming enqueue.
• Fix user-agent table width when no values are set.

1.1.4 2023-09-23

Bugfixes

• Fix canonicals logic.
• Do not untrailingslash all URLs, but keep them as they are.
• Allow to specify “localhost” as entry points.
• Fix URL column style (overflow: auto).

1.1.2 2023-09-16

Enhancements

• Add an option to specify several User-Agents.
• Dynamically escape regex characters when enabling regex. And de-escape on uncheck.
• For headers-based requests classification, do not show 0, but instead show nothing; so that people could not misinterpret it as another request.
• Add a setting to skip the pages with the warmed canonical.
• Add optional “Comment” column to the warm log.
• Change number of pages in batch size from 10 to 1 to increase the robustness.
• Add a setting for logs retention time.
• New menu layout.

Bugfixes

• Make “Rewrite to HTTPS” to work for the “URL to warm” on page edit block, and for entry points pages exclusion.
• Fix update_failed_to_retrieve_links() and update_retrieved_links() added links check, to not add duplicates.
• Improve RegExes robustness by using “lazy” quantifiers, instead of the greedy ones.

1.0.54 2023-07-18

Enhancements

• Use wp_options table instead of cache for the lock of migrations.
• Set min PHP version to 7.4.

1.0.51 2023-07-16

Enhancements

• Cleans up Action Scheduler log after itself (older than 30 days for failed actions, and older than 2 days for completed actions).
• Added index to the table to make the post edit page open faster.
• Entry points limit lifted.
• Can specify homepage relative paths as entry points.
• Add support for “html” files warming.
• Add a notice when the plugin is being updated instead of blocking the whole logic.

Bugfixes

• Fix table creation error.
• Fix action scheduler scheduling (improve initialization check).
• Fix a bug to not warm “mailto:” URLs, but only the ones that start from “http://” or “https://”.
• Add checks in case wp_parse_url() is false.
• Add Author metadata to the plugin main file.
• Do not add URL params to files with ‘XML’ extensions.
• Fix a bug when URL params to sitemap pages were not added.
• Fix a bug when “sitemaps” setting was not reset.

1.0.44 2023-06-11

Bugfixes

• Add pagination to blog posts.
• Support pagination for plaintext URLs structure.

1.0.43 2023-06-08

Bugfixes

• Fix URLs overlap over the post edit content box.

1.0.41 2023-06-07

Enhancements

• Add pages support for taxonomies.
• Better migration routine.

1.0.40 2023-06-07

Bugfixes

• Add missing libraries.

1.0.38 2023-06-06

Bugfixes

• Fix the plugin (didn’t start previously).

1.0.37 2023-06-06

Enhancements

• Decrease plugin size from 8 MiB to 2.8 MiB by removing irrelevant files.

1.0.36 2023-06-03

Enhancements

• Rename “Interval” tab to “Autorun Interval”.
• Capitalize first letters of all tab words.
• Add post URL, and with URL params (if presents) to the post edit block.
• Add option to exclude pages by regex.

Bugfixes

• Fix interval-based warming.

1.0.35 2023-05-15

Enhancements

• Add an option to skip pages (that match URL a substring).
• Add links (tag ) to the warm-up URL column.

1.0.34 2023-04-30

Bugfixes

• Fixed error when the host was undefined.

1.0.25 2023-02-23

Enhancements

• Check page load time pre warmer.
• Add Varnish and Cloudfront support.

1.0.20 2023-02-15

Bugfixes

• Redundant dashboard query deleted.

1.0.19 2023-02-14

Bugfixes

• Min PHP version required downgraded to 5.6.20.

1.0.17 2023-02-08

Optimizations

• Dashboard query to consider only the previous 30 days.

Bugfixes

• Default sitemap priority changed from 0 to 0.5.
• Add terms to the tree query fixed.

1.0.16 2023-02-08

Enhancements

• Improved accuracy for server IP address detection.

1.0.15 2023-02-08

Bugfixes

• Regexes fixed and improved (now work more accurately and catch more links).

1.0.11 2023-02-08

Enhancements

• Consider priority for sitemaps.

1.0.10 2023-02-08

Enhancements

• Optimized dashboard widget by using a faster query for the dashboard widget.

Bugfixes

• Do not get empty afterload time for the dashboard widget.

1.0.9 2023-02-08

Enhancements

• Add term links and archives to the posts also.

1.0.8 2023-02-05

Enhancements

• Option to sitemaps of entry points as entry points

1.0.7 2023-02-04

Enhancements

• Option to add all public site posts (of any type) as entry points.

Bugfixes

• Batch size reduced from 10 to 1.

1.0.6 2023-02-02

Enhancements

• Post warm details.

1.0.5 2023-02-02

Enhancements

• Slow down when hit 429 or 500 error: first 2 times slower for 15 minutes from the previous avg speed, then 8 times slower, then pause for an hour.

Bugfixes

• Speed limit is now working properly.

1.0.4 2023-01-30

Enhancements

• Show a notification when a page is blocked by Cloudflare or other firewall (403, 502, 504 codes).

Bugfixes

• Infinite loop during fake tree creation when the initial passed depth is 0.

1.0.3 2023-01-29

Enhancements

• Changelog added.