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From Jayaram Ponnusamy <jayaram.ponnus...@gmail.com>
Subject [users@httpd] help on mod_cache to Enable cache
Date Tue, 08 Nov 2016 07:00:16 GMT
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

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