Dear All, We are using Apache with Tomcat (CMS) using mod_jk, also we are using mod_cache to caching contents. But some reason, we are facing extreme slowness on our site after enabled mod_cache module. I could see below entries in http_errors.log continously stating that mod_cache.c(635): cache: < URL Path> not cached. Reason: HTTP HEAD request
May be the reason when we try to access these URLs getting extreme slow. Kindly please help us to resolve this issue. [Tue Nov 08 09:33:00 2016] [debug] mod_cache.c(141): Adding CACHE_SAVE filter for /sites/ar_QA/chs/about/ [Tue Nov 08 09:33:00 2016] [debug] mod_cache.c(148): Adding CACHE_REMOVE_URL filter for /sites/ar_QA/chs/about/ [Tue Nov 08 09:33:01 2016] [debug] mod_headers.c(756): headers: ap_headers_output_filter() [Tue Nov 08 09:33:01 2016] [debug] mod_cache.c(635): cache: /sites/ar_QA/chs/about/ not cached. Reason: HTTP HEAD request [Tue Nov 08 09:33:01 2016] [debug] mod_proxy_http.c(1855): proxy: header only [Tue Nov 08 09:33:01 2016] [debug] mod_headers.c(756): headers: ap_headers_output_filter() [Tue Nov 08 09:33:01 2016] [debug] mod_cache.c(635): cache: /sites/ar/chs/about/ not cached. Reason: HTTP HEAD request [Tue Nov 08 09:33:01 2016] [debug] proxy_util.c(2112): proxy: HTTP: has released connection for (*) [Tue Nov 08 09:33:02 2016] [debug] mod_headers.c(756): headers: ap_headers_output_filter() [Tue Nov 08 09:33:02 2016] [debug] mod_cache.c(635): cache: /sites/ar_QA/about/events/ not cached. Reason: HTTP HEAD request [Tue Nov 08 09:33:02 2016] [debug] mod_proxy_http.c(1855): proxy: header only [Tue Nov 08 09:33:02 2016] [debug] mod_headers.c(756): headers: ap_headers_output_filter() [Tue Nov 08 09:33:02 2016] [debug] mod_cache.c(635): cache: /sites/ar/about/events/ not cached. Reason: HTTP HEAD request [Tue Nov 08 09:33:02 2016] [debug] proxy_util.c(2112): proxy: HTTP: has released connection for (*) [Tue Nov 08 09:33:02 2016] [debug] mod_cache.c(141): Adding CACHE_SAVE filter for /sites/ar/about/newsroom/ [Tue Nov 08 09:33:02 2016] [debug] mod_cache.c(148): Adding CACHE_REMOVE_URL filter for /sites/ar/about/newsroom/ [Tue Nov 08 09:33:02 2016] [debug] mod_cache.c(141): Adding CACHE_SAVE filter for /sites/ar_QA/about/newsroom/ [Tue Nov 08 09:33:02 2016] [debug] mod_cache.c(148): Adding CACHE_REMOVE_URL filter for /sites/ar_QA/about/newsroom/ [Tue Nov 08 09:33:04 2016] [debug] mod_headers.c(756): headers: ap_headers_output_filter() [Tue Nov 08 09:33:04 2016] [debug] mod_cache.c(635): cache: /sites/ar_QA/about/newsroom/ not cached. Reason: HTTP HEAD request [Tue Nov 08 09:33:04 2016] [debug] mod_proxy_http.c(1855): proxy: header only [Tue Nov 08 09:33:04 2016] [debug] mod_headers.c(756): headers: ap_headers_output_filter() [Tue Nov 08 09:33:04 2016] [debug] mod_cache.c(635): cache: /sites/ar/about/newsroom/ not cached. Reason: HTTP HEAD request [Tue Nov 08 09:33:04 2016] [debug] proxy_util.c(2112): proxy: HTTP: has released connection for (*) Following modules are enabled in our Apache HTTP mod_file_cache.so mod_mem_cache.so mod_cache.so mod_disk_cache.so mod_deflate.so mod_mpm_prefork.so mod_proxy_http.so mod_headers.so mod_proxy_ajp.so mod_expires.so httpd.so mod_rewrite.so mod_jk.so Thanks Jayaram
