Cache is Purging Often Despite TTL Settings

Cache is getting purged quite often, inconsistent with the TTL settings.

Some actions may unintentionally trigger a purge.

Enable the Debug Log, chosing Admin IP only, add your IP under Admin IPs, and set Debug Level to Advanced.

Purge all cache, access any page twice, make sure the cache header is showing hit, then do something that is suspected to trigger the purge.

In this example, this action would be edit a WooCommerce product's inventory, since you have noticed that it appears to purge irrelevant pages as well.

Now check the debug log:

06/24/18 20:55:53.809 [1.2.3.4:31844 1 mIO] ------GET HTTP/1.1 (HTTPS) /
06/24/18 20:55:53.809 [1.2.3.4:31844 1 mIO] Query String: 
06/24/18 20:55:53.809 [1.2.3.4:31844 1 mIO] User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.87 Safari/537.36
06/24/18 20:55:53.809 [1.2.3.4:31844 1 mIO] Accept Encoding: gzip, deflate, br
06/24/18 20:55:53.809 [1.2.3.4:31844 1 mIO] Cookie _lscache_vary: admin_bar:1;logged-in:1;role:99
06/24/18 20:55:53.809 [1.2.3.4:31844 1 mIO] X-LSCACHE: true
06/24/18 20:55:54.107 [1.2.3.4:31844 1 mIO] Media init
06/24/18 20:55:54.114 [1.2.3.4:31844 1 mIO] CDN init
06/24/18 20:55:54.115 [1.2.3.4:31844 1 mIO] Task init
06/24/18 20:55:54.119 [1.2.3.4:31844 1 mIO] [Router] LSCWP_CTRL bypassed empty
06/24/18 20:55:54.120 [1.2.3.4:31844 1 mIO] GUI init
06/24/18 20:55:54.192 [1.2.3.4:31844 1 mIO] [Ctrl] X Cache_control init on
06/24/18 20:55:54.409 [1.2.3.4:31844 1 mIO] [Core] Footer hook called
06/24/18 20:55:54.410 [1.2.3.4:31844 1 mIO] ESI: [block ID] admin-bar [wrapper] adminbar [Control] private,no-vary
06/24/18 20:55:54.410 [1.2.3.4:31844 1 mIO] [Core] Footer check passed
06/24/18 20:55:54.410 [1.2.3.4:31844 1 mIO] [Router] get_uid: 1 => LSC_Router::get_uid()@175 => LSC_Router::get_role()@194 => LSC_Config->in_exclude_cache_roles()@556 => LSC_Control->_setting_cacheable()@694
06/24/18 20:55:54.410 [1.2.3.4:31844 1 mIO] [Router] get_role: administrator
06/24/18 20:55:54.410 [1.2.3.4:31844 1 mIO] [Cfg] role in vary_group [group] 99
06/24/18 20:55:54.410 [1.2.3.4:31844 1 mIO] [Vary] show_admin_bar_front: true
06/24/18 20:55:54.410 [1.2.3.4:31844 1 mIO] [Vary] admin bar : true
06/24/18 20:55:54.411 [1.2.3.4:31844 1 mIO] [Vary] no custimzed vary 
06/24/18 20:55:54.411 [1.2.3.4:31844 1 mIO] X-LiteSpeed-Cache-Control: public,max-age=604800,esi=on
06/24/18 20:55:54.411 [1.2.3.4:31844 1 mIO] X-LiteSpeed-Tag: 87f1_URL.6666cd76f96956469e7be39d750cc7d9,87f1_F,87f1_Po.24,87f1_PGS,87f1_
06/24/18 20:55:54.411 [1.2.3.4:31844 1 mIO] [Core] Footer check passed
06/24/18 20:55:54.411 [1.2.3.4:31844 1 mIO] [Media] finalize
06/24/18 20:55:54.411 [1.2.3.4:31844 1 mIO] GUI bypassed by no counter
06/24/18 20:55:54.411 [1.2.3.4:31844 1 mIO] [Optm] start
06/24/18 20:55:54.411 [1.2.3.4:31844 1 mIO] CDN bypass
06/24/18 20:55:54.411 [1.2.3.4:31844 1 mIO] End response
--------------------------------------------------------------------------------

06/24/18 20:55:54.709 [1.2.3.4:31844 1 NEi] ------GET HTTP/1.1 (HTTPS) /
06/24/18 20:55:54.709 [1.2.3.4:31844 1 NEi] Query String: lsesi=lswcp&_control=private,no-vary&esi=YToyOntzOjM6InJlZiI7czoxOiIvIjtzOjg6ImJsb2NrX2lkIjtzOjk6ImFkbWluLWJhciI7fQ%3D%3D
06/24/18 20:55:54.709 [1.2.3.4:31844 1 NEi] User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.87 Safari/537.36
06/24/18 20:55:54.709 [1.2.3.4:31844 1 NEi] Accept Encoding: gzip, deflate, br
06/24/18 20:55:54.709 [1.2.3.4:31844 1 NEi] Cookie _lscache_vary: admin_bar:1;logged-in:1;role:99
06/24/18 20:55:54.709 [1.2.3.4:31844 1 NEi] X-LSCACHE: true
06/24/18 20:55:55.011 [1.2.3.4:31844 1 NEi] Media init
06/24/18 20:55:55.020 [1.2.3.4:31844 1 NEi] CDN init
06/24/18 20:55:55.023 [1.2.3.4:31844 1 NEi] Task init
06/24/18 20:55:55.029 [1.2.3.4:31844 1 NEi] [Router] LSCWP_CTRL bypassed empty
06/24/18 20:55:55.029 [1.2.3.4:31844 1 NEi] GUI init
06/24/18 20:55:55.105 [1.2.3.4:31844 1 NEi] [Ctrl] X Cache_control init on
06/24/18 20:55:55.108 [1.2.3.4:31844 1 NEi] ------- ESI ------- admin-bar -------
06/24/18 20:55:55.109 [1.2.3.4:31844 1 NEi] [Ctrl] X Cache_control -> private 
06/24/18 20:55:55.109 [1.2.3.4:31844 1 NEi] [Ctrl] X Cache_control -> no-vary => LSC_Control::set_no_vary()@108 => LSC_ESI::load_esi_block()@273 => 
/home/domain/public_html/wp-includes/template-loader.php@7 => 
/home/domain/public_html/wp-blog-header.php@74
06/24/18 20:55:55.115 [1.2.3.4:31844 1 NEi] ESI: adminbar ref: /
06/24/18 20:55:55.115 [1.2.3.4:31844 1 NEi] [Core] CHK html bypass: miss footer const
06/24/18 20:55:55.116 [1.2.3.4:31844 1 NEi] [Router] get_uid: 1 => LSC_Router::get_uid()@175 => LSC_Router::get_role()@194 => LSC_Config->in_exclude_cache_roles()@556 => LSC_Control->_setting_cacheable()@694
06/24/18 20:55:55.116 [1.2.3.4:31844 1 NEi] [Router] get_role: administrator
06/24/18 20:55:55.116 [1.2.3.4:31844 1 NEi] [Cfg] role in vary_group [group] 99
06/24/18 20:55:55.116 [1.2.3.4:31844 1 NEi] [Vary] show_admin_bar_front: true
06/24/18 20:55:55.116 [1.2.3.4:31844 1 NEi] [Vary] admin bar : true
06/24/18 20:55:55.116 [1.2.3.4:31844 1 NEi] [Vary] no custimzed vary 
06/24/18 20:55:55.116 [1.2.3.4:31844 1 NEi] X-LiteSpeed-Cache-Control: private,no-vary,max-age=1800
06/24/18 20:55:55.117 [1.2.3.4:31844 1 NEi] X-LiteSpeed-Tag: 87f1_tag_priv,public:87f1_ESI,public:87f1_ESI.admin-bar,public:87f1_
06/24/18 20:55:55.117 [1.2.3.4:31844 1 NEi] [Core] CHK html bypass: miss footer const
06/24/18 20:55:55.117 [1.2.3.4:31844 1 NEi] [Media] bypass: Not frontend HTML type
06/24/18 20:55:55.117 [1.2.3.4:31844 1 NEi] GUI bypassed by no counter
06/24/18 20:55:55.117 [1.2.3.4:31844 1 NEi] [Optm] bypass: Not frontend HTML type
06/24/18 20:55:55.117 [1.2.3.4:31844 1 NEi] CDN bypass
06/24/18 20:55:55.117 [1.2.3.4:31844 1 NEi] End response
--------------------------------------------------------------------------------

06/24/18 20:56:02.207 [1.2.3.4:31844 1 Mj6] ------POST HTTP/1.1 (HTTPS) /wp-admin/admin-ajax.php
06/24/18 20:56:02.207 [1.2.3.4:31844 1 Mj6] Query String: 
06/24/18 20:56:02.207 [1.2.3.4:31844 1 Mj6] User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.87 Safari/537.36
06/24/18 20:56:02.207 [1.2.3.4:31844 1 Mj6] Accept Encoding: gzip, deflate, br
06/24/18 20:56:02.207 [1.2.3.4:31844 1 Mj6] Cookie _lscache_vary: admin_bar:1;logged-in:1;role:99
06/24/18 20:56:02.207 [1.2.3.4:31844 1 Mj6] X-LSCACHE: true
06/24/18 20:56:02.594 [1.2.3.4:31844 1 Mj6] Media init
06/24/18 20:56:02.601 [1.2.3.4:31844 1 Mj6] CDN init
06/24/18 20:56:02.602 [1.2.3.4:31844 1 Mj6] Task init
06/24/18 20:56:02.612 [1.2.3.4:31844 1 Mj6] [Router] LSCWP_CTRL bypassed empty
06/24/18 20:56:02.793 [1.2.3.4:31844 1 Mj6] [Ctrl] X Cache_control -> no Cache ( Admin page ) => LSC_Control::set_nocache()@312 => LSC_Admin->admin_init()@130 => WP_Hook->apply_filters()@286
06/24/18 20:56:02.796 [1.2.3.4:31844 1 Mj6] [Core] CHK html bypass: miss footer const
06/24/18 20:56:02.796 [1.2.3.4:31844 1 Mj6] [Ctrl] not cacheable before ctrl finalize
06/24/18 20:56:02.796 [1.2.3.4:31844 1 Mj6] [Router] get_uid: 1 => LSC_Router::get_uid()@175 => LSC_Vary->finalize_default_vary()@340 => LSC_Vary->_update_default_vary()@299 => LSC_Vary->_finalize()@513
06/24/18 20:56:02.796 [1.2.3.4:31844 1 Mj6] [Router] get_role: administrator
06/24/18 20:56:02.796 [1.2.3.4:31844 1 Mj6] [Cfg] role in vary_group [group] 99
06/24/18 20:56:02.796 [1.2.3.4:31844 1 Mj6] [Vary] show_admin_bar_front: true
06/24/18 20:56:02.796 [1.2.3.4:31844 1 Mj6] [Vary] admin bar : true
06/24/18 20:56:02.797 [1.2.3.4:31844 1 Mj6] [Vary] no custimzed vary 
06/24/18 20:56:02.798 [1.2.3.4:31844 1 Mj6] X-LiteSpeed-Cache-Control: no-cache
06/24/18 20:56:02.798 [1.2.3.4:31844 1 Mj6] [Core] CHK html bypass: miss footer const
06/24/18 20:56:02.798 [1.2.3.4:31844 1 Mj6] [Media] bypass: Not frontend HTML type
06/24/18 20:56:02.798 [1.2.3.4:31844 1 Mj6] GUI bypassed by no counter
06/24/18 20:56:02.798 [1.2.3.4:31844 1 Mj6] [Optm] bypass: Not frontend HTML type
06/24/18 20:56:02.798 [1.2.3.4:31844 1 Mj6] CDN bypass
06/24/18 20:56:02.798 [1.2.3.4:31844 1 Mj6] End response
--------------------------------------------------------------------------------

06/24/18 20:56:11.831 [1.2.3.4:31844 1 O9r] ------POST HTTP/1.1 (HTTPS) /wp-admin/post.php
06/24/18 20:56:11.831 [1.2.3.4:31844 1 O9r] Query String: 
06/24/18 20:56:11.831 [1.2.3.4:31844 1 O9r] User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.87 Safari/537.36
06/24/18 20:56:11.831 [1.2.3.4:31844 1 O9r] Accept Encoding: gzip, deflate, br
06/24/18 20:56:11.831 [1.2.3.4:31844 1 O9r] Cookie _lscache_vary: admin_bar:1;logged-in:1;role:99
06/24/18 20:56:11.831 [1.2.3.4:31844 1 O9r] X-LSCACHE: true
06/24/18 20:56:12.231 [1.2.3.4:31844 1 O9r] Media init
06/24/18 20:56:12.239 [1.2.3.4:31844 1 O9r] CDN init
06/24/18 20:56:12.240 [1.2.3.4:31844 1 O9r] Task init
06/24/18 20:56:12.245 [1.2.3.4:31844 1 O9r] [Router] LSCWP_CTRL bypassed empty
06/24/18 20:56:12.424 [1.2.3.4:31844 1 O9r] [Ctrl] X Cache_control -> no Cache ( Admin page ) => LSC_Control::set_nocache()@312 => LSC_Admin->admin_init()@130 => WP_Hook->apply_filters()@286
06/24/18 20:56:12.507 [1.2.3.4:31844 1 O9r] [Purge] added WC_T.18 => LSC_Purge->_add()@306 => LSC_Purge::add()@287 => LSC_API::purge()@269 => LSC_ThirdParty_WooCommerce->backend_purge()@717 => WP_Hook->apply_filters()@286 => WP_Hook->do_action()@310 => 
/home/domain/public_html/wp-content/plugins/litespeed-cache/inc/purge.class.php@453 => LSC_Purge->_get_purge_tags_by_post()@896 => LSC_Purge::purge_post()@645
06/24/18 20:56:12.507 [1.2.3.4:31844 1 O9r] X-LiteSpeed-Purge: public,87f1_WC_T.18
06/24/18 20:56:12.509 [1.2.3.4:31844 1 O9r] [Purge] added Po.37,URL.c5058f4b6fbb3ed974efbe319a954e61,W.recent-posts-2,T.2,T.9,T.18,A.1,PT.product,F,H,PGS,PGSRP,D.201806 => LSC_Purge->_add()@306 => LSC_Purge::purge_post()@653 => WP_Hook->apply_filters()@286 => WP_Hook->do_action()@310 => 
/home/domain/public_html/wp-includes/post.php@453 => 
/home/domain/public_html/wp-includes/post.php@3602 => 
/home/domain/public_html/wp-admin/includes/post.php@3713 => 
/home/domain/public_html/wp-admin/post.php@377
06/24/18 20:56:12.509 [1.2.3.4:31844 1 O9r] X-LiteSpeed-Purge: public,87f1_WC_T.18,87f1_Po.37,87f1_URL.c5058f4b6fbb3ed974efbe319a954e61,87f1_W.recent-posts-2,87f1_T.2,87f1_T.9,87f1_T.18,87f1_A.1,87f1_PT.product,87f1_F,87f1_H,87f1_PGS,87f1_PGSRP,87f1_D.201806
06/24/18 20:56:12.509 [1.2.3.4:31844 1 O9r] [Purge] added REST => LSC_Purge->_add()@306 => LSC_Purge::purge_post()@655 => WP_Hook->apply_filters()@286 => WP_Hook->do_action()@310 => 
/home/domain/public_html/wp-includes/post.php@453 => 
/home/domain/public_html/wp-includes/post.php@3602 => 
/home/domain/public_html/wp-admin/includes/post.php@3713 => 
/home/domain/public_html/wp-admin/post.php@377
06/24/18 20:56:12.509 [1.2.3.4:31844 1 O9r] X-LiteSpeed-Purge: public,87f1_WC_T.18,87f1_Po.37,87f1_URL.c5058f4b6fbb3ed974efbe319a954e61,87f1_W.recent-posts-2,87f1_T.2,87f1_T.9,87f1_T.18,87f1_A.1,87f1_PT.product,87f1_F,87f1_H,87f1_PGS,87f1_PGSRP,87f1_D.201806,87f1_REST
06/24/18 20:56:12.509 [1.2.3.4:31844 1 O9r] [Ctrl] X Cache_control -> stale
06/24/18 20:56:12.532 [1.2.3.4:31844 1 O9r] [Purge] added WC_T.9 => LSC_Purge->_add()@306 => LSC_Purge::add()@287 => LSC_API::purge()@269 => LSC_ThirdParty_WooCommerce->delete_rel()@692 => WP_Hook->apply_filters()@288 => WP_Hook->do_action()@310 => 
/home/domain/public_html/wp-includes/taxonomy.php@453 => 
/home/domain/public_html/wp-includes/taxonomy.php@2451 => 
/home/domain/public_html/wp-includes/post.php@2339
06/24/18 20:56:12.532 [1.2.3.4:31844 1 O9r] X-LiteSpeed-Purge: public,stale,87f1_WC_T.18,87f1_Po.37,87f1_URL.c5058f4b6fbb3ed974efbe319a954e61,87f1_W.recent-posts-2,87f1_T.2,87f1_T.9,87f1_T.18,87f1_A.1,87f1_PT.product,87f1_F,87f1_H,87f1_PGS,87f1_PGSRP,87f1_D.201806,87f1_REST,87f1_WC_T.9
06/24/18 20:56:12.596 [1.2.3.4:31844 1 O9r] [Ctrl] 301 from https://www.mydomain.com/wp-admin/post.php
06/24/18 20:56:12.596 [1.2.3.4:31844 1 O9r] [Ctrl] 301 to https://www.mydomain.com/wp-admin/post.php?post=37&action=edit&message=1
06/24/18 20:56:12.596 [1.2.3.4:31844 1 O9r] [Ctrl] X Cache_control -> no Cache ( 301 to same url ) => LSC_Control::set_nocache()@312 => LSC_Control::check_redirect()@462 => WP_Hook->apply_filters()@286
06/24/18 20:56:12.597 [1.2.3.4:31844 1 O9r] [Core] CHK html bypass: miss footer const
06/24/18 20:56:12.597 [1.2.3.4:31844 1 O9r] [Ctrl] not cacheable before ctrl finalize
06/24/18 20:56:12.597 [1.2.3.4:31844 1 O9r] [Router] get_uid: 1 => LSC_Router::get_uid()@175 => LSC_Vary->finalize_default_vary()@340 => LSC_Vary->_update_default_vary()@299 => LSC_Vary->_finalize()@513
06/24/18 20:56:12.597 [1.2.3.4:31844 1 O9r] [Router] get_role: administrator
06/24/18 20:56:12.597 [1.2.3.4:31844 1 O9r] [Cfg] role in vary_group [group] 99
06/24/18 20:56:12.597 [1.2.3.4:31844 1 O9r] [Vary] show_admin_bar_front: true
06/24/18 20:56:12.597 [1.2.3.4:31844 1 O9r] [Vary] admin bar : true
06/24/18 20:56:12.597 [1.2.3.4:31844 1 O9r] [Vary] no custimzed vary 
06/24/18 20:56:12.598 [1.2.3.4:31844 1 O9r] X-LiteSpeed-Cache-Control: no-cache
06/24/18 20:56:12.598 [1.2.3.4:31844 1 O9r] X-LiteSpeed-Purge: public,stale,87f1_WC_T.18,87f1_Po.37,87f1_URL.c5058f4b6fbb3ed974efbe319a954e61,87f1_W.recent-posts-2,87f1_T.2,87f1_T.9,87f1_T.18,87f1_A.1,87f1_PT.product,87f1_F,87f1_H,87f1_PGS,87f1_PGSRP,87f1_D.201806,87f1_REST,87f1_WC_T.9
06/24/18 20:56:12.599 [1.2.3.4:31844 1 O9r] [Core] CHK html bypass: miss footer const
06/24/18 20:56:12.599 [1.2.3.4:31844 1 O9r] [Media] bypass: Not frontend HTML type
06/24/18 20:56:12.599 [1.2.3.4:31844 1 O9r] GUI bypassed by no counter
06/24/18 20:56:12.599 [1.2.3.4:31844 1 O9r] [Optm] bypass: Not frontend HTML type
06/24/18 20:56:12.599 [1.2.3.4:31844 1 O9r] CDN bypass
06/24/18 20:56:12.599 [1.2.3.4:31844 1 O9r] End response
--------------------------------------------------------------------------------

06/24/18 20:56:12.901 [1.2.3.4:31844 1 bZS] ------GET HTTP/1.1 (HTTPS) /wp-admin/post.php
06/24/18 20:56:12.902 [1.2.3.4:31844 1 bZS] Query String: post=37&action=edit&message=1
06/24/18 20:56:12.902 [1.2.3.4:31844 1 bZS] User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.87 Safari/537.36
06/24/18 20:56:12.902 [1.2.3.4:31844 1 bZS] Accept Encoding: gzip, deflate, br
06/24/18 20:56:12.902 [1.2.3.4:31844 1 bZS] Cookie _lscache_vary: admin_bar:1;logged-in:1;role:99
06/24/18 20:56:12.902 [1.2.3.4:31844 1 bZS] X-LSCACHE: true
06/24/18 20:56:13.239 [1.2.3.4:31844 1 bZS] Media init
06/24/18 20:56:13.301 [1.2.3.4:31844 1 bZS] CDN init
06/24/18 20:56:13.302 [1.2.3.4:31844 1 bZS] Task init
06/24/18 20:56:13.307 [1.2.3.4:31844 1 bZS] [Router] LSCWP_CTRL bypassed empty
06/24/18 20:56:13.434 [1.2.3.4:31844 1 bZS] [Ctrl] X Cache_control -> no Cache ( Admin page ) => LSC_Control::set_nocache()@312 => LSC_Admin->admin_init()@130 => WP_Hook->apply_filters()@286
06/24/18 20:56:13.554 [1.2.3.4:31844 1 bZS] [Core] CHK html bypass: miss footer const
06/24/18 20:56:13.554 [1.2.3.4:31844 1 bZS] [Ctrl] not cacheable before ctrl finalize
06/24/18 20:56:13.555 [1.2.3.4:31844 1 bZS] [Router] get_uid: 1 => LSC_Router::get_uid()@175 => LSC_Vary->finalize_default_vary()@340 => LSC_Vary->_update_default_vary()@299 => LSC_Vary->_finalize()@513
06/24/18 20:56:13.555 [1.2.3.4:31844 1 bZS] [Router] get_role: administrator
06/24/18 20:56:13.555 [1.2.3.4:31844 1 bZS] [Cfg] role in vary_group [group] 99
06/24/18 20:56:13.555 [1.2.3.4:31844 1 bZS] [Vary] show_admin_bar_front: true
06/24/18 20:56:13.555 [1.2.3.4:31844 1 bZS] [Vary] admin bar : true
06/24/18 20:56:13.555 [1.2.3.4:31844 1 bZS] [Vary] no custimzed vary 
06/24/18 20:56:13.555 [1.2.3.4:31844 1 bZS] X-LiteSpeed-Cache-Control: no-cache
06/24/18 20:56:13.556 [1.2.3.4:31844 1 bZS] [Core] CHK html bypass: miss footer const
06/24/18 20:56:13.556 [1.2.3.4:31844 1 bZS] [Media] bypass: Not frontend HTML type
06/24/18 20:56:13.556 [1.2.3.4:31844 1 bZS] GUI bypassed by no counter
06/24/18 20:56:13.556 [1.2.3.4:31844 1 bZS] [Optm] bypass: Not frontend HTML type
06/24/18 20:56:13.556 [1.2.3.4:31844 1 bZS] CDN bypass
06/24/18 20:56:13.556 [1.2.3.4:31844 1 bZS] End response
--------------------------------------------------------------------------------

06/24/18 20:56:14.713 [1.2.3.4:31844 1 ASt] ------GET HTTP/1.1 (HTTPS) /wp-admin/admin-ajax.php
06/24/18 20:56:14.713 [1.2.3.4:31844 1 ASt] Query String: action=oembed-cache&post=37
06/24/18 20:56:14.713 [1.2.3.4:31844 1 ASt] User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.87 Safari/537.36
06/24/18 20:56:14.713 [1.2.3.4:31844 1 ASt] Accept Encoding: gzip, deflate, br
06/24/18 20:56:14.713 [1.2.3.4:31844 1 ASt] Cookie _lscache_vary: admin_bar:1;logged-in:1;role:99
06/24/18 20:56:14.713 [1.2.3.4:31844 1 ASt] X-LSCACHE: true
06/24/18 20:56:15.207 [1.2.3.4:31844 1 ASt] Media init
06/24/18 20:56:15.215 [1.2.3.4:31844 1 ASt] CDN init
06/24/18 20:56:15.216 [1.2.3.4:31844 1 ASt] Task init
06/24/18 20:56:15.225 [1.2.3.4:31844 1 ASt] [Router] LSCWP_CTRL bypassed empty
06/24/18 20:56:15.422 [1.2.3.4:31844 1 ASt] [Ctrl] X Cache_control -> no Cache ( Admin page ) => LSC_Control::set_nocache()@312 => LSC_Admin->admin_init()@130 => WP_Hook->apply_filters()@286
06/24/18 20:56:15.426 [1.2.3.4:31844 1 ASt] [Core] CHK html bypass: miss footer const
06/24/18 20:56:15.426 [1.2.3.4:31844 1 ASt] [Ctrl] not cacheable before ctrl finalize
06/24/18 20:56:15.426 [1.2.3.4:31844 1 ASt] [Router] get_uid: 1 => LSC_Router::get_uid()@175 => LSC_Vary->finalize_default_vary()@340 => LSC_Vary->_update_default_vary()@299 => LSC_Vary->_finalize()@513
06/24/18 20:56:15.426 [1.2.3.4:31844 1 ASt] [Router] get_role: administrator
06/24/18 20:56:15.426 [1.2.3.4:31844 1 ASt] [Cfg] role in vary_group [group] 99
06/24/18 20:56:15.426 [1.2.3.4:31844 1 ASt] [Vary] show_admin_bar_front: true
06/24/18 20:56:15.426 [1.2.3.4:31844 1 ASt] [Vary] admin bar : true
06/24/18 20:56:15.427 [1.2.3.4:31844 1 ASt] [Vary] no custimzed vary 
06/24/18 20:56:15.428 [1.2.3.4:31844 1 ASt] X-LiteSpeed-Cache-Control: no-cache
06/24/18 20:56:15.428 [1.2.3.4:31844 1 ASt] [Core] CHK html bypass: miss footer const
06/24/18 20:56:15.428 [1.2.3.4:31844 1 ASt] [Media] bypass: Not frontend HTML type
06/24/18 20:56:15.428 [1.2.3.4:31844 1 ASt] GUI bypassed by no counter
06/24/18 20:56:15.428 [1.2.3.4:31844 1 ASt] [Optm] bypass: Not frontend HTML type
06/24/18 20:56:15.428 [1.2.3.4:31844 1 ASt] CDN bypass
06/24/18 20:56:15.428 [1.2.3.4:31844 1 ASt] End response
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06/24/18 20:56:18.697 [1.2.3.4:31844 1 0R4] ------GET HTTP/1.1 (HTTPS) /
06/24/18 20:56:18.697 [1.2.3.4:31844 1 0R4] Query String: 
06/24/18 20:56:18.697 [1.2.3.4:31844 1 0R4] User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.87 Safari/537.36
06/24/18 20:56:18.697 [1.2.3.4:31844 1 0R4] Accept Encoding: gzip, deflate, br
06/24/18 20:56:18.697 [1.2.3.4:31844 1 0R4] Cookie _lscache_vary: admin_bar:1;logged-in:1;role:99
06/24/18 20:56:18.697 [1.2.3.4:31844 1 0R4] X-LSCACHE: true
06/24/18 20:56:19.018 [1.2.3.4:31844 1 0R4] Media init
06/24/18 20:56:19.026 [1.2.3.4:31844 1 0R4] CDN init
06/24/18 20:56:19.027 [1.2.3.4:31844 1 0R4] Task init
06/24/18 20:56:19.031 [1.2.3.4:31844 1 0R4] [Router] LSCWP_CTRL bypassed empty
06/24/18 20:56:19.031 [1.2.3.4:31844 1 0R4] GUI init
06/24/18 20:56:19.106 [1.2.3.4:31844 1 0R4] [Ctrl] X Cache_control init on
06/24/18 20:56:19.315 [1.2.3.4:31844 1 0R4] [Core] Footer hook called
06/24/18 20:56:19.316 [1.2.3.4:31844 1 0R4] ESI: [block ID] admin-bar [wrapper] adminbar [Control] private,no-vary
06/24/18 20:56:19.316 [1.2.3.4:31844 1 0R4] [Core] Footer check passed
06/24/18 20:56:19.316 [1.2.3.4:31844 1 0R4] [Router] get_uid: 1 => LSC_Router::get_uid()@175 => LSC_Router::get_role()@194 => LSC_Config->in_exclude_cache_roles()@556 => LSC_Control->_setting_cacheable()@694
06/24/18 20:56:19.316 [1.2.3.4:31844 1 0R4] [Router] get_role: administrator
06/24/18 20:56:19.317 [1.2.3.4:31844 1 0R4] [Cfg] role in vary_group [group] 99
06/24/18 20:56:19.317 [1.2.3.4:31844 1 0R4] [Vary] show_admin_bar_front: true
06/24/18 20:56:19.317 [1.2.3.4:31844 1 0R4] [Vary] admin bar : true
06/24/18 20:56:19.317 [1.2.3.4:31844 1 0R4] [Vary] no custimzed vary 
06/24/18 20:56:19.317 [1.2.3.4:31844 1 0R4] X-LiteSpeed-Cache-Control: public,max-age=604800,esi=on
06/24/18 20:56:19.317 [1.2.3.4:31844 1 0R4] X-LiteSpeed-Tag: 87f1_URL.6666cd76f96956469e7be39d750cc7d9,87f1_F,87f1_Po.24,87f1_PGS,87f1_
06/24/18 20:56:19.317 [1.2.3.4:31844 1 0R4] [Core] Footer check passed
06/24/18 20:56:19.317 [1.2.3.4:31844 1 0R4] [Media] finalize
06/24/18 20:56:19.317 [1.2.3.4:31844 1 0R4] GUI bypassed by no counter
06/24/18 20:56:19.317 [1.2.3.4:31844 1 0R4] [Optm] start
06/24/18 20:56:19.317 [1.2.3.4:31844 1 0R4] CDN bypass
06/24/18 20:56:19.317 [1.2.3.4:31844 1 0R4] End response
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The above logs are generated from the following set of actions: visit homepage, edit product, visit home page again.

Since LiteSpeed Cache is a tag-based caching system, let's find all of the tag(s).

X-LiteSpeed-Tag: 87f1_URL.6666cd76f96956469e7be39d750cc7d9,87f1_F,87f1_Po.24,87f1_PGS,87f1_

X-LiteSpeed-Tag: 87f1_tag_priv,public:87f1_ESI,public:87f1_ESI.admin-bar,public:87f1_

X-LiteSpeed-Tag: 87f1_URL.6666cd76f96956469e7be39d750cc7d9,87f1_F,87f1_Po.24,87f1_PGS,87f1_

And the purge action is also called by tag, so now let's find the purge tag.

X-LiteSpeed-Purge: public,87f1_WC_T.18

X-LiteSpeed-Purge: public,87f1_WC_T.18,87f1_Po.37,87f1_URL.c5058f4b6fbb3ed974efbe319a954e61,87f1_W.recent-posts-2,87f1_T.2,87f1_T.9,87f1_T.18,87f1_A.1,87f1_PT.product,87f1_F,87f1_H,87f1_PGS,87f1_PGSRP,87f1_D.201806

X-LiteSpeed-Purge: public,87f1_WC_T.18,87f1_Po.37,87f1_URL.c5058f4b6fbb3ed974efbe319a954e61,87f1_W.recent-posts-2,87f1_T.2,87f1_T.9,87f1_T.18,87f1_A.1,87f1_PT.product,87f1_F,87f1_H,87f1_PGS,87f1_PGSRP,87f1_D.201806,87f1_REST

X-LiteSpeed-Purge: public,stale,87f1_WC_T.18,87f1_Po.37,87f1_URL.c5058f4b6fbb3ed974efbe319a954e61,87f1_W.recent-posts-2,87f1_T.2,87f1_T.9,87f1_T.18,87f1_A.1,87f1_PT.product,87f1_F,87f1_H,87f1_PGS,87f1_PGSRP,87f1_D.201806,87f1_REST,87f1_WC_T.9

X-LiteSpeed-Purge: public,stale,87f1_WC_T.18,87f1_Po.37,87f1_URL.c5058f4b6fbb3ed974efbe319a954e61,87f1_W.recent-posts-2,87f1_T.2,87f1_T.9,87f1_T.18,87f1_A.1,87f1_PT.product,87f1_F,87f1_H,87f1_PGS,87f1_PGSRP,87f1_D.201806,87f1_REST,87f1_WC_T.9

Basically, if the tag(s) in X-LiteSpeed-Purge is/are contained in the X-LiteSpeed-Tag of other pages, then those other pages will be purged during the action.

Now let's check the above tags. We will see:

87f1_F and 87f1_PGS are contained by the homepage, so it gets purged.

87f1 is the prefix. Then what do F and PGS mean? You can see a list of tag classes in the code. Check lines 15-33.

F and PGS are triggered by the setting Auto Purge Rules For Publish/Update. If you do not want the Front page or Pages to be purged every time you update a WooCommerce item, then you need to uncheck those options.

Note: If you see the PGSRP tag, that is for the Recent Posts Widget. You can uncheck the all pages with Recent Posts Widget setting in the auto purge rules, to keep it from purging every page on your site. If you still want to keep the widget itself updated, enable ESI for the site, enable ESI for the Recent Posts Widget, and set it to Public. That will keep the widget updated for new posts, but won't require every page it is on to be purged.