You are viewing a plain text version of this content. The canonical link for it is here.
Posted to users@httpd.apache.org by "Anthony J. Biacco" <ab...@formatdynamics.com> on 2009/02/21 00:11:56 UTC
[users@httpd] RE: mem_cache and disk_cache acting differently when determine when to cache content?
I stand corrected, The mem_cache module DOES serve out the cached
version, but not until the 6th request of the URL. The disk_cache module
serves out the cached version on the 2nd request (as it should).
FYI, I'm using the worker mpm.
-Tony
---------------------------
Manager, IT Operations
Format Dynamics, Inc.
303-573-1800x27
abiacco@formatdynamics.com
http://www.formatdynamics.com
-----Original Message-----
From: Anthony J. Biacco
Sent: Friday, February 20, 2009 4:05 PM
To: 'users@httpd.apache.org'
Cc: 'modules-dev@httpd.apache.org'
Subject: mem_cache and disk_cache acting differently when determine when
to cache content?
Hi,
I'm serving out dynamic content from apache 2.2.11 that has a query
string on it. The output is different if the query string is different,
so I'm not ignoring the query string.
My problem is that when I use the mem_cache module for this and look at
the debug log, the effects seem different than when I use the disk_cache
module. For mem_cache on every request it shows it getting cached again
(and not getting served out of cache) or so that's how I'm reading it.
For disk_cache it seems to cache it fine and serve out of cache on
subsequent requests.
Log with mem_cache (all requests):
[Fri Feb 20 15:47:23 2009] [debug] mod_cache.c(131): Adding CACHE_SAVE
filter for /path
[Fri Feb 20 15:47:23 2009] [debug] mod_cache.c(138): Adding
CACHE_REMOVE_URL filter for /path
[Fri Feb 20 15:47:23 2009] [debug] mod_headers.c(740): headers:
ap_headers_output_filter()
[Fri Feb 20 15:47:23 2009] [debug] mod_cache.c(639): cache: Caching url:
/path?var=value
[Fri Feb 20 15:47:23 2009] [debug] mod_cache.c(645): cache: Removing
CACHE_REMOVE_URL filter.
[Fri Feb 20 15:47:23 2009] [info] mem_cache: Cached url:
http://x.x.x.x/path?var=value
Log with disk_cache (first request):
[Fri Feb 20 15:55:18 2009] [debug] mod_cache.c(131): Adding CACHE_SAVE
filter for /path
[Fri Feb 20 15:55:18 2009] [debug] mod_cache.c(138): Adding
CACHE_REMOVE_URL filter for /path
[Fri Feb 20 15:55:18 2009] [debug] mod_headers.c(740): headers:
ap_headers_output_filter()
[Fri Feb 20 15:55:18 2009] [debug] mod_cache.c(639): cache: Caching url:
/path?var=value
[Fri Feb 20 15:55:18 2009] [debug] mod_cache.c(645): cache: Removing
CACHE_REMOVE_URL filter.
[Fri Feb 20 15:55:18 2009] [debug] mod_disk_cache.c(962): disk_cache:
Stored headers for URL http://x.x.x.x/path?var=value
[Fri Feb 20 15:55:18 2009] [debug] mod_disk_cache.c(1051): disk_cache:
Body for URL http://x.x.x.x/path?var=value cached.
Log with disk_cache (subsequent request):
[Fri Feb 20 15:56:42 2009] [debug] mod_disk_cache.c(476): disk_cache:
Recalled cached URL info header http://x.x.x.x/path?var=value
[Fri Feb 20 15:56:42 2009] [debug] mod_disk_cache.c(749): disk_cache:
Recalled headers for URL http://x.x.x.x/path?var=value
[Fri Feb 20 15:56:42 2009] [debug] mod_cache.c(282): cache: running
CACHE_OUT filter
[Fri Feb 20 15:56:42 2009] [debug] mod_cache.c(296): cache: serving
/path
Response headers for content:
Date Fri, 20 Feb 2009 23:01:08 GMT
Server Apache
Cache-Control max-age=300, must-revalidate
Expires Fri, 20 Feb 2009 23:06:08 GMT
Connection close
Transfer-Encoding chunked
Content-Type text/plain
Content-Language En
Cache config (mem):
<IfModule mod_cache.c>
CacheEnable mem /path
CacheDefaultExpire 300
CacheIgnoreNoLastMod On
CacheIgnoreQueryString Off
<IfModule mod_disk_cache.c>
CacheRoot /var/www/cache
CacheDirLevels 1
CacheDirLength 4
CacheMaxFileSize 150000
CacheMinFileSize 10
</IfModule>
<IfModule mod_mem_cache.c>
MCacheRemovalAlgorithm LRU
MCacheMaxObjectCount 100
MCacheMaxObjectSize 150000
MCacheMinObjectSize 10
MCacheSize 10240
</IfModule>
</IfModule>
Cache config (disk):
Same as mem config except CacheEnable line is "CacheEnable disk /path"
Any help is appreciated.
-Tony
---------------------------
Manager, IT Operations
Format Dynamics, Inc.
303-573-1800x27
abiacco@formatdynamics.com
http://www.formatdynamics.com
---------------------------------------------------------------------
The official User-To-User support forum of the Apache HTTP Server Project.
See <URL:http://httpd.apache.org/userslist.html> for more info.
To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
" from the digest: users-digest-unsubscribe@httpd.apache.org
For additional commands, e-mail: users-help@httpd.apache.org
Re: [users@httpd] RE: mem_cache and disk_cache acting differently
when determine when to cache content?
Posted by Eric Covener <co...@gmail.com>.
On Fri, Feb 20, 2009 at 6:11 PM, Anthony J. Biacco
<ab...@formatdynamics.com> wrote:
> I stand corrected, The mem_cache module DOES serve out the cached
> version, but not until the 6th request of the URL. The disk_cache module
> serves out the cached version on the 2nd request (as it should).
> FYI, I'm using the worker mpm.
each process builds up its own in-memory cache.
You might increase ThreadsPerChild if you really want memcache.
--
Eric Covener
covener@gmail.com
---------------------------------------------------------------------
The official User-To-User support forum of the Apache HTTP Server Project.
See <URL:http://httpd.apache.org/userslist.html> for more info.
To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
" from the digest: users-digest-unsubscribe@httpd.apache.org
For additional commands, e-mail: users-help@httpd.apache.org
RE: mem_cache and disk_cache acting differently when determine when to cache content?
Posted by "Anthony J. Biacco" <ab...@formatdynamics.com>.
I have 5 children, so Eric's answer that each process has its own
in-memory cache makes sense.
-Tony
---------------------------
Manager, IT Operations
Format Dynamics, Inc.
303-573-1800x27
abiacco@formatdynamics.com
http://www.formatdynamics.com
-----Original Message-----
From: Houser, Rick [mailto:Houser.Rick@aoins.com]
Sent: Monday, February 23, 2009 6:22 AM
To: modules-dev@httpd.apache.org; users@httpd.apache.org
Subject: RE: mem_cache and disk_cache acting differently when determine
when to cache content?
Is this the only child process, or do you have 3+?
Thanks,
Rick Houser
Auto-Owners Insurance
Systems Support
(517)703-2580
-----Original Message-----
From: Anthony J. Biacco [mailto:abiacco@formatdynamics.com]
Sent: Friday, February 20, 2009 6:12 PM
To: users@httpd.apache.org
Cc: modules-dev@httpd.apache.org
Subject: RE: mem_cache and disk_cache acting differently when determine
when to cache content?
I stand corrected, The mem_cache module DOES serve out the cached
version, but not until the 6th request of the URL. The disk_cache module
serves out the cached version on the 2nd request (as it should).
FYI, I'm using the worker mpm.
-Tony
---------------------------
Manager, IT Operations
Format Dynamics, Inc.
303-573-1800x27
abiacco@formatdynamics.com
http://www.formatdynamics.com
-----Original Message-----
From: Anthony J. Biacco
Sent: Friday, February 20, 2009 4:05 PM
To: 'users@httpd.apache.org'
Cc: 'modules-dev@httpd.apache.org'
Subject: mem_cache and disk_cache acting differently when determine when
to cache content?
Hi,
I'm serving out dynamic content from apache 2.2.11 that has a query
string on it. The output is different if the query string is different,
so I'm not ignoring the query string.
My problem is that when I use the mem_cache module for this and look at
the debug log, the effects seem different than when I use the disk_cache
module. For mem_cache on every request it shows it getting cached again
(and not getting served out of cache) or so that's how I'm reading it.
For disk_cache it seems to cache it fine and serve out of cache on
subsequent requests.
Log with mem_cache (all requests):
[Fri Feb 20 15:47:23 2009] [debug] mod_cache.c(131): Adding CACHE_SAVE
filter for /path [Fri Feb 20 15:47:23 2009] [debug] mod_cache.c(138):
Adding CACHE_REMOVE_URL filter for /path [Fri Feb 20 15:47:23 2009]
[debug] mod_headers.c(740): headers:
ap_headers_output_filter()
[Fri Feb 20 15:47:23 2009] [debug] mod_cache.c(639): cache: Caching url:
/path?var=value
[Fri Feb 20 15:47:23 2009] [debug] mod_cache.c(645): cache: Removing
CACHE_REMOVE_URL filter.
[Fri Feb 20 15:47:23 2009] [info] mem_cache: Cached url:
http://x.x.x.x/path?var=value
Log with disk_cache (first request):
[Fri Feb 20 15:55:18 2009] [debug] mod_cache.c(131): Adding CACHE_SAVE
filter for /path [Fri Feb 20 15:55:18 2009] [debug] mod_cache.c(138):
Adding CACHE_REMOVE_URL filter for /path [Fri Feb 20 15:55:18 2009]
[debug] mod_headers.c(740): headers:
ap_headers_output_filter()
[Fri Feb 20 15:55:18 2009] [debug] mod_cache.c(639): cache: Caching url:
/path?var=value
[Fri Feb 20 15:55:18 2009] [debug] mod_cache.c(645): cache: Removing
CACHE_REMOVE_URL filter.
[Fri Feb 20 15:55:18 2009] [debug] mod_disk_cache.c(962): disk_cache:
Stored headers for URL http://x.x.x.x/path?var=value [Fri Feb 20
15:55:18 2009] [debug] mod_disk_cache.c(1051): disk_cache:
Body for URL http://x.x.x.x/path?var=value cached.
Log with disk_cache (subsequent request):
[Fri Feb 20 15:56:42 2009] [debug] mod_disk_cache.c(476): disk_cache:
Recalled cached URL info header http://x.x.x.x/path?var=value [Fri Feb
20 15:56:42 2009] [debug] mod_disk_cache.c(749): disk_cache:
Recalled headers for URL http://x.x.x.x/path?var=value [Fri Feb 20
15:56:42 2009] [debug] mod_cache.c(282): cache: running CACHE_OUT filter
[Fri Feb 20 15:56:42 2009] [debug] mod_cache.c(296): cache: serving
/path
Response headers for content:
Date Fri, 20 Feb 2009 23:01:08 GMT
Server Apache
Cache-Control max-age=300, must-revalidate
Expires Fri, 20 Feb 2009 23:06:08 GMT
Connection close
Transfer-Encoding chunked
Content-Type text/plain
Content-Language En
Cache config (mem):
<IfModule mod_cache.c>
CacheEnable mem /path
CacheDefaultExpire 300
CacheIgnoreNoLastMod On
CacheIgnoreQueryString Off
<IfModule mod_disk_cache.c>
CacheRoot /var/www/cache
CacheDirLevels 1
CacheDirLength 4
CacheMaxFileSize 150000
CacheMinFileSize 10
</IfModule>
<IfModule mod_mem_cache.c>
MCacheRemovalAlgorithm LRU
MCacheMaxObjectCount 100
MCacheMaxObjectSize 150000
MCacheMinObjectSize 10
MCacheSize 10240
</IfModule>
</IfModule>
Cache config (disk):
Same as mem config except CacheEnable line is "CacheEnable disk /path"
Any help is appreciated.
-Tony
---------------------------
Manager, IT Operations
Format Dynamics, Inc.
303-573-1800x27
abiacco@formatdynamics.com
http://www.formatdynamics.com
RE: mem_cache and disk_cache acting differently when determine
when to cache content?
Posted by "Houser, Rick" <Ho...@aoins.com>.
Is this the only child process, or do you have 3+?
Thanks,
Rick Houser
Auto-Owners Insurance
Systems Support
(517)703-2580
-----Original Message-----
From: Anthony J. Biacco [mailto:abiacco@formatdynamics.com]
Sent: Friday, February 20, 2009 6:12 PM
To: users@httpd.apache.org
Cc: modules-dev@httpd.apache.org
Subject: RE: mem_cache and disk_cache acting differently when determine
when to cache content?
I stand corrected, The mem_cache module DOES serve out the cached
version, but not until the 6th request of the URL. The disk_cache module
serves out the cached version on the 2nd request (as it should).
FYI, I'm using the worker mpm.
-Tony
---------------------------
Manager, IT Operations
Format Dynamics, Inc.
303-573-1800x27
abiacco@formatdynamics.com
http://www.formatdynamics.com
-----Original Message-----
From: Anthony J. Biacco
Sent: Friday, February 20, 2009 4:05 PM
To: 'users@httpd.apache.org'
Cc: 'modules-dev@httpd.apache.org'
Subject: mem_cache and disk_cache acting differently when determine when
to cache content?
Hi,
I'm serving out dynamic content from apache 2.2.11 that has a query
string on it. The output is different if the query string is different,
so I'm not ignoring the query string.
My problem is that when I use the mem_cache module for this and look at
the debug log, the effects seem different than when I use the disk_cache
module. For mem_cache on every request it shows it getting cached again
(and not getting served out of cache) or so that's how I'm reading it.
For disk_cache it seems to cache it fine and serve out of cache on
subsequent requests.
Log with mem_cache (all requests):
[Fri Feb 20 15:47:23 2009] [debug] mod_cache.c(131): Adding CACHE_SAVE
filter for /path [Fri Feb 20 15:47:23 2009] [debug] mod_cache.c(138):
Adding CACHE_REMOVE_URL filter for /path [Fri Feb 20 15:47:23 2009]
[debug] mod_headers.c(740): headers:
ap_headers_output_filter()
[Fri Feb 20 15:47:23 2009] [debug] mod_cache.c(639): cache: Caching url:
/path?var=value
[Fri Feb 20 15:47:23 2009] [debug] mod_cache.c(645): cache: Removing
CACHE_REMOVE_URL filter.
[Fri Feb 20 15:47:23 2009] [info] mem_cache: Cached url:
http://x.x.x.x/path?var=value
Log with disk_cache (first request):
[Fri Feb 20 15:55:18 2009] [debug] mod_cache.c(131): Adding CACHE_SAVE
filter for /path [Fri Feb 20 15:55:18 2009] [debug] mod_cache.c(138):
Adding CACHE_REMOVE_URL filter for /path [Fri Feb 20 15:55:18 2009]
[debug] mod_headers.c(740): headers:
ap_headers_output_filter()
[Fri Feb 20 15:55:18 2009] [debug] mod_cache.c(639): cache: Caching url:
/path?var=value
[Fri Feb 20 15:55:18 2009] [debug] mod_cache.c(645): cache: Removing
CACHE_REMOVE_URL filter.
[Fri Feb 20 15:55:18 2009] [debug] mod_disk_cache.c(962): disk_cache:
Stored headers for URL http://x.x.x.x/path?var=value [Fri Feb 20
15:55:18 2009] [debug] mod_disk_cache.c(1051): disk_cache:
Body for URL http://x.x.x.x/path?var=value cached.
Log with disk_cache (subsequent request):
[Fri Feb 20 15:56:42 2009] [debug] mod_disk_cache.c(476): disk_cache:
Recalled cached URL info header http://x.x.x.x/path?var=value [Fri Feb
20 15:56:42 2009] [debug] mod_disk_cache.c(749): disk_cache:
Recalled headers for URL http://x.x.x.x/path?var=value [Fri Feb 20
15:56:42 2009] [debug] mod_cache.c(282): cache: running CACHE_OUT filter
[Fri Feb 20 15:56:42 2009] [debug] mod_cache.c(296): cache: serving
/path
Response headers for content:
Date Fri, 20 Feb 2009 23:01:08 GMT
Server Apache
Cache-Control max-age=300, must-revalidate
Expires Fri, 20 Feb 2009 23:06:08 GMT
Connection close
Transfer-Encoding chunked
Content-Type text/plain
Content-Language En
Cache config (mem):
<IfModule mod_cache.c>
CacheEnable mem /path
CacheDefaultExpire 300
CacheIgnoreNoLastMod On
CacheIgnoreQueryString Off
<IfModule mod_disk_cache.c>
CacheRoot /var/www/cache
CacheDirLevels 1
CacheDirLength 4
CacheMaxFileSize 150000
CacheMinFileSize 10
</IfModule>
<IfModule mod_mem_cache.c>
MCacheRemovalAlgorithm LRU
MCacheMaxObjectCount 100
MCacheMaxObjectSize 150000
MCacheMinObjectSize 10
MCacheSize 10240
</IfModule>
</IfModule>
Cache config (disk):
Same as mem config except CacheEnable line is "CacheEnable disk /path"
Any help is appreciated.
-Tony
---------------------------
Manager, IT Operations
Format Dynamics, Inc.
303-573-1800x27
abiacco@formatdynamics.com
http://www.formatdynamics.com