This is an old revision of the document!
Symptom and behavior:
cache is getting purged quite often, inconsistent with the TTL settings.
Cause:
Some actions may unintentionally triggered purged.
Diagnosis:
1. Enable debug log, add your IP there , enable for admin IP only , and also enable advanced log.
2. 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 Woocommerce product's inventory since it purges irrelevant pages as well.
3. 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 --------------------------------------------------------------------------------
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 --------------------------------------------------------------------------------
4. The above logs are generated on action visit homepage , edit product , visit home page again.
Since LiteSpeed Cache is tag-based caching system , let's find all 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 contained in X-LiteSpeed-Tag in other pages, then this page(s) will be purged during action.
Now let's check above tags, we will see:
87f1_F
and 87f1_PGS
are contained by homepage , so it gets purged.
87f1
is the prefix , then what's F
and PGS
mean? to know that , please visit https://github.com/litespeedtech/lscache_wp/blob/master/litespeed-cache/inc/tag.class.php
from line 15 - 33 , there are the tag means.