Cache gets purged constantly

Hi,

X-LiteSpeed-Purge: public,stale,3a6_;private,3a6_W.recent-comments-2

this means , pubilic cache with tag 3a6_ (which is literally every page contains this tag) , and private cache with that W.recent-comments-2 , are purged

what do you mean by order note ?

Best regards,

In Woocommerce orders can have notes. These are small pieces of information attached to an order and are normally only shown in the admin GUI.
The request “POST HTTP/1.1 (HTTPS) /wp-json/wc/v2/orders/63441/notes”
adds a private note to the order 63441.
I dont understand why this would purge any cache. My suspicion is that this could cause our cache to purge when it should not, since we have 3rd party integrations that add notes to order now and then. What does “public,stale,3a6_FD,3a6_W.recent-comments-2;private,3a6_W.recent-comments-2” mean?

Regarding 3a6_, where does this tag come from? What does it represent? How can I see which pages have this tag?

In addition the order note post purge there is this cron job you see above that purges 3a6_. Do you have any idea what this is? It seems to be running every hour or so.

Digging a bit more I see that the cron jobs are woocommerce_scheduled_subscription_payment_retry.

This is a paymenet retry from the Woocommerce Subscriptions plugin.

It looks like this:

12/17/21 08:33:53.459 [91.201.60.17:47438 1 HxG] ?? ------POST HTTP/1.1 (HTTPS)  /wp-cron.php
12/17/21 08:33:53.459 [91.201.60.17:47438 1 HxG] Query String: doing_wp_cron=1639730029.4312500953674316406250
12/17/21 08:33:53.459 [91.201.60.17:47438 1 HxG] HTTP_REFERER: https://flowneuroscience.com/wp-cron.php?doing_wp_cron=1639730029.4312500953674316406250
12/17/21 08:33:53.459 [91.201.60.17:47438 1 HxG] Cookie: 
12/17/21 08:33:53.460 [91.201.60.17:47438 1 HxG] X-LiteSpeed-Purge: public,stale,3a6_FD,3a6_W.recent-comments-2,3a6_Po.63214,3a6_URL./,3a6_W.recent-posts-2,3a6_F,3a6_H,3a6_PGS,3a6_REST;private,3a6_W.recent-comments-2 => LiteSpeed\LSC->send_headers()@552 => WP_Hook->apply_filters(,ARRAY)@303 => WP_Hook->do_action(ARRAY)@327 => 
/home/flovvtes/public_html/wp2/wp-includes/load.php@470

If I understand everything correctly 3a6_F this means that the front page of the site is purge when there is a payment retry??

yes , _F is the front page

what exactly does that woocommerce_scheduled_subscription_payment_retry do ? like if it updates some post or something ?

In Woocommerce each order is a post. This cron job retries the payment of a subscription order. It will add some information to the order, so in some sense it is updating a post but this should not affect the front page in any way what so ever. It would only affect logged in pages of Wooc customers (private cache), API calls, and the admin interface.

Is there anyway I can block the purge due to these events?

I also see that some part of the cache is purged when we add notes to an order:

12/20/21 00:04:12.007 [54.171.34.131:41550 1 kHn] ?? ------POST HTTP/1.1 (HTTPS)  /wp-json/wc/v3/subscriptions/58888/notes
12/20/21 00:04:12.007 [54.171.34.131:41550 1 kHn] Query String: 
12/20/21 00:04:12.007 [54.171.34.131:41550 1 kHn] Cookie: 
12/20/21 00:04:12.007 [54.171.34.131:41550 1 kHn] X-LiteSpeed-Purge: public,3a6_FD,3a6_W.recent-comments-2;private,3a6_W.recent-comments-2 => LiteSpeed\LSC->send_headers()@552 => WP_Hook->apply_filters(,ARRAY)@303 => WP_Hook->do_action(ARRAY)@327 => 
/home/flovvtes/public_html/wp2/wp-includes/load.php@470

What is purged here?

$exclude_url_list = array( "cron", "wp-json" );
foreach ($exclude_url_list as $exclude_url) {
  if (strpos($_SERVER['REQUEST_URI'], $exclude_url) !== FALSE) {
ob_start( function($buffer){
@header('X-LiteSpeed-Purge: nothing');
return $buffer;
} );
    }
}

try add ithis into your theme’s functions.php , this should suppress all purge call when request uri contains cron and wp-json

the log will still show , but the server should only see nothing tag

What do you mean by “the log will still show? , but the server should only see nothing tag”

I still see log entries like this:

01/29/22 22:19:12.498 [34.244.18.16:35832 1 jNM] ——POST HTTP/1.1 (HTTPS) ?/shop/wp-json/wc/v3/subscriptions/66797/notes
01/29/22 22:19:12.498 [34.244.18.16:35832 1 jNM] Query String:
01/29/22 22:19:12.498 [34.244.18.16:35832 1 jNM] User Agent: python-requests/2.25.1
01/29/22 22:19:12.498 [34.244.18.16:35832 1 jNM] Accept: */*
01/29/22 22:19:12.498 [34.244.18.16:35832 1 jNM] Accept Encoding: gzip, deflate
01/29/22 22:19:12.498 [34.244.18.16:35832 1 jNM] Cookie:
01/29/22 22:19:12.498 [34.244.18.16:35832 1 jNM] X-LSCACHE: true
01/29/22 22:19:12.498 [34.244.18.16:35832 1 jNM] LSCACHE_VARY_COOKIE: _lscache_vary_shop
01/29/22 22:19:12.499 [34.244.18.16:35832 1 jNM] X-LiteSpeed-Purge: public,stale,54d_FD => LiteSpeed\LSC->send_headers()@558 => WP_Hook->apply_filters(,ARRAY)@303 => WP_Hook->do_action(ARRAY)@327 =>
/home/flovvtes/public_html/shop/wp-includes/load.php@470

and

01/29/22 22:41:58.018 [91.201.60.17:54960 1 l7i] ——POST HTTP/1.1 (HTTPS) ?/shop/wp-cron.php
01/29/22 22:41:58.018 [91.201.60.17:54960 1 l7i] Query String: doing_wp_cron=1643496111.7711660861968994140625
01/29/22 22:41:58.018 [91.201.60.17:54960 1 l7i] HTTP_REFERER: https://flowneuroscience.com/shop/wp-cron.php?doing_wp_cron=1643496111.7711660861968994140625
01/29/22 22:41:58.018 [91.201.60.17:54960 1 l7i] User Agent: WordPress/5.8.3; https://flowneuroscience.com/shop
01/29/22 22:41:58.018 [91.201.60.17:54960 1 l7i] Accept: */*
01/29/22 22:41:58.018 [91.201.60.17:54960 1 l7i] Accept Encoding: deflate, gzip
01/29/22 22:41:58.018 [91.201.60.17:54960 1 l7i] Cookie:
01/29/22 22:41:58.018 [91.201.60.17:54960 1 l7i] X-LSCACHE: true
01/29/22 22:41:58.018 [91.201.60.17:54960 1 l7i] LSCACHE_VARY_COOKIE: _lscache_vary_shop
01/29/22 22:41:58.018 [91.201.60.17:54960 1 l7i] X-LiteSpeed-Purge: public,stale,54d_FD => LiteSpeed\LSC->send_headers()@558 => WP_Hook->apply_filters(ARRAY)@303 => WP_Hook->do_action(ARRAY)@327 =>
/home/flovvtes/public_html/shop/wp-includes/load.php@470

Ive verified?that your script is running.

Any update on this?

Were you ever able to get this resolved?