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22 .TH "HTCACHECLEAN" 8 "2010-03-29" "Apache HTTP Server" "htcacheclean"
25 htcacheclean \- Clean up the disk cache
30 \fBhtcacheclean\fR [ -\fBD\fR ] [ -\fBv\fR ] [ -\fBt\fR ] [ -\fBr\fR ] [ -\fBn\fR ] -\fBp\fR\fIpath\fR -\fBl\fR\fIlimit\fR
33 \fBhtcacheclean\fR [ -\fBn\fR ] [ -\fBt\fR ] [ -\fBi\fR ] [ -\fBP\fR\fIpidfile\fR ] -\fBd\fR\fIinterval\fR -\fBp\fR\fIpath\fR -\fBl\fR\fIlimit\fR
36 \fBhtcacheclean\fR [ -\fBD\fR ] [ -\fBv\fR ] [ -\fBt\fR ] -\fBp\fR\fIpath\fR \fIurl\fR
42 htcacheclean is used to keep the size of mod_disk_cache's storage within a certain limit\&. This tool can run either manually or in daemon mode\&. When running in daemon mode, it sleeps in the background and checks the cache directory at regular intervals for cached content to be removed\&. You can stop the daemon cleanly by sending it a TERM or INT signal\&. When run manually, a once off check of the cache directory is made for cached content to be removed\&. If one or more URLs are specified, each URL will be deleted from the cache, if present\&.
50 Daemonize and repeat cache cleaning every \fIinterval\fR minutes\&. This option is mutually exclusive with the -D, -v and -r options\&. To shutdown the daemon cleanly, just send it a SIGTERM or SIGINT\&.
53 Do a dry run and don't delete anything\&. This option is mutually exclusive with the -d option\&.
56 Be verbose and print statistics\&. This option is mutually exclusive with the -d option\&.
59 Clean thoroughly\&. This assumes that the Apache web server is not running (otherwise you may get garbage in the cache)\&. This option is mutually exclusive with the -d option and implies the -t option\&.
62 Be nice\&. This causes slower processing in favour of other processes\&. htcacheclean 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\&.
65 Delete all empty directories\&. By default only cache files are removed, however with some configurations the large number of directories created may require attention\&. 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\&.
68 Specify \fIpath\fR as the root directory of the disk cache\&. This should be the same value as specified with the CacheRoot directive\&.
71 Specify \fIpidfile\fR as the name of the file to write the process ID to when daemonized\&.
74 Specify \fIlimit\fR as the total disk cache size limit\&. The value is expressed in bytes by default (or attaching B to the number)\&. Attach K for Kbytes or M for MBytes\&.
77 Be intelligent and run only when there was a modification of the disk cache\&. This option is only possible together with the -d option\&.
79 .SH "DELETING A SPECIFIC URL"
82 If htcacheclean is passed one or more URLs, each URL will be deleted from the cache\&. If multiple variants of an URL exists, all variants would be deleted\&.
85 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\&. Note the '?' in the URL must always be specified explicitly, whether a query string is present or not\&. 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\&.
90 htcacheclean returns a zero status ("true") if all operations were successful, 1 otherwise\&. If an URL is specified, and the URL was cached and successfully removed, 0 is returned, 2 otherwise\&. If an error occurred during URL removal, 1 is returned\&.