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.TH &quot;HTCACHECLEAN&quot; 8 &quot;2019-08-09&quot; &quot;Apache HTTP Server&quot; &quot;htcacheclean&quot;

.SH NAME
htcacheclean \- Clean up the disk cache

.SH &quot;SYNOPSIS&quot;
 
.PP
\fB\fBhtcacheclean\fR [ -\fBD\fR ] [ -\fBv\fR ] [ -\fBt\fR ] [ -\fBr\fR ] [ -\fBn\fR ] [ -\fBR\fR\fIround\fR ] -\fBp\fR\fIpath\fR [ -\fBl\fR\fIlimit\fR ] [ -\fBL\fR\fIlimit\fR ]\fR
 
.PP
\fB\fBhtcacheclean\fR [ -\fBn\fR ] [ -\fBt\fR ] [ -\fBi\fR ] [ -\fBP\fR\fIpidfile\fR ] [ -\fBR\fR\fIround\fR ] -\fBd\fR\fIinterval\fR -\fBp\fR\fIpath\fR [ -\fBl\fR\fIlimit\fR ] [ -\fBL\fR\fIlimit\fR ]\fR
 
.PP
\fB\fBhtcacheclean\fR [ -\fBv\fR ] [ -\fBR\fR\fIround\fR ] -\fBp\fR\fIpath\fR [ -\fBa\fR ] [ -\fBA\fR ]\fR
 
.PP
\fB\fBhtcacheclean\fR [ -\fBD\fR ] [ -\fBv\fR ] [ -\fBt\fR ] [ -\fBR\fR\fIround\fR ] -\fBp\fR\fIpath\fR \fIurl\fR\fR
 

.SH &quot;SUMMARY&quot;
 
.PP
\fBhtcacheclean\fR is used to keep the size of mod_cache_disk&#039;s storage within a given size limit, or limit on inodes in use\&amp;. This tool can run either manually or in daemon mode\&amp;. When running in daemon mode, it sleeps in the background and checks the cache directory at regular intervals for cached content to be removed\&amp;. You can stop the daemon cleanly by sending it a TERM or INT signal\&amp;. When run manually, a once off check of the cache directory is made for cached content to be removed\&amp;. If one or more URLs are specified, each URL will be deleted from the cache, if present\&amp;.
 

.SH &quot;OPTIONS&quot;
 
 
.TP
\fB-d\fIinterval\fR\fR
Daemonize and repeat cache cleaning every \fIinterval\fR minutes\&amp;. This option is mutually exclusive with the \fB-D\fR, \fB-v\fR and \fB-r\fR options\&amp;. To shutdown the daemon cleanly, just send it a \fBSIGTERM\fR or \fBSIGINT\fR\&amp;.  
.TP
\fB-D\fR
Do a dry run and don&#039;t delete anything\&amp;. This option is mutually exclusive with the \fB-d\fR option\&amp;. When doing a dry run and deleting directories with \fB-t\fR, the inodes reported deleted in the stats cannot take into account the directories deleted, and will be marked as an estimate\&amp;.  
.TP
\fB-v\fR
Be verbose and print statistics\&amp;. This option is mutually exclusive with the \fB-d\fR option\&amp;.  
.TP
\fB-r\fR
Clean thoroughly\&amp;. This assumes that the Apache web server is not running (otherwise you may get garbage in the cache)\&amp;. This option is mutually exclusive with the \fB-d\fR option and implies the \fB-t\fR option\&amp;.  
.TP
\fB-n\fR
Be nice\&amp;. This causes slower processing in favour of other processes\&amp;. \fBhtcacheclean\fR will sleep from time to time so that (a) the disk IO will be delayed and (b) the kernel can schedule other processes in the meantime\&amp;.  
.TP
\fB-t\fR
Delete all empty directories\&amp;. By default only cache files are removed, however with some configurations the large number of directories created may require attention\&amp;. If your configuration requires a very large number of directories, to the point that inode or file allocation table exhaustion may become an issue, use of this option is advised\&amp;.  
.TP
\fB-p\fIpath\fR\fR
Specify \fIpath\fR as the root directory of the disk cache\&amp;. This should be the same value as specified with the CacheRoot directive\&amp;.  
.TP
\fB-P\fIpidfile\fR\fR
Specify \fIpidfile\fR as the name of the file to write the process ID to when daemonized\&amp;.  
.TP
\fB-R\fIround\fR\fR
Specify \fIround\fR as the amount to round sizes up to, to compensate for disk block sizes\&amp;. Set to the block size of the cache partition\&amp;.  
.TP
\fB-l\fIlimit\fR\fR
Specify \fIlimit\fR as the total disk cache size limit\&amp;. The value is expressed in bytes by default (or attaching \fBB\fR to the number)\&amp;. Attach \fBK\fR for Kbytes, \fBM\fR for MBytes or \fBG\fR for Gbytes\&amp;.  
.TP
\fB-L\fIlimit\fR\fR
Specify \fIlimit\fR as the total disk cache inode limit\&amp;. \fBK\fR, \fBM\fR or \fBG\fR suffix can also be used\&amp;.  
.TP
\fB-i\fR
Be intelligent and run only when there was a modification of the disk cache\&amp;. This option is only possible together with the \fB-d\fR option\&amp;.  
.TP
\fB-a\fR
List the URLs currently stored in the cache\&amp;. Variants of the same URL will be listed once for each variant\&amp;.  
.TP
\fB-A\fR
List the URLs currently stored in the cache, along with their attributes in the following order: url, header size, body size, status, entity version, date, expiry, request time, response time, body present, head request\&amp;.  
 
.SH &quot;DELETING A SPECIFIC URL&quot;
 
.PP
If \fBhtcacheclean\fR is passed one or more URLs, each URL will be deleted from the cache\&amp;. If multiple variants of an URL exists, all variants would be deleted\&amp;.
 
.PP
When a reverse proxied URL is to be deleted, the effective URL is constructed from the \fBHost\fR header, the \fBport\fR, the \fBpath\fR and the \fBquery\fR\&amp;. Note the &#039;?&#039; in the URL must always be specified explicitly, whether a query string is present or not\&amp;. For example, an attempt to delete the path \fB/\fR from the server \fBlocalhost\fR, the URL to delete would be \fBhttp://localhost:80/?\fR\&amp;.
 
.SH &quot;LISTING URLS IN THE CACHE&quot;
 
.PP
By passing the \fB-a\fR or \fB-A\fR options to \fBhtcacheclean\fR, the URLs within the cache will be listed as they are found, one URL per line\&amp;. The \fB-A\fR option dumps the full cache entry after the URL, with fields in the following order:
 
 
.TP
url
The URL of the entry\&amp;. 
.TP
header size
The size of the header in bytes\&amp;. 
.TP
body size
The size of the body in bytes\&amp;. 
.TP
status
Status of the cached response\&amp;. 
.TP
entity version
The number of times this entry has been revalidated without being deleted\&amp;. 
.TP
date
Date of the response\&amp;. 
.TP
expiry
Expiry date of the response\&amp;. 
.TP
request time
Time of the start of the request\&amp;. 
.TP
response time
Time of the end of the request\&amp;. 
.TP
body present
If 0, no body is stored with this request, 1 otherwise\&amp;. 
.TP
head request
If 1, the entry contains a cached HEAD request with no body, 0 otherwise\&amp;. 
 
.SH &quot;EXIT STATUS&quot;
 
.PP
\fBhtcacheclean\fR returns a zero status (&quot;true&quot;) if all operations were successful, \fB1\fR otherwise\&amp;. If an URL is specified, and the URL was cached and successfully removed, \fB0\fR is returned, \fB2\fR otherwise\&amp;. If an error occurred during URL removal, \fB1\fR is returned\&amp;.
 
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