git.m6w6.name Git - m6w6/libmemcached/blob - docs/man/memcached_stat.3

   1 .TH "MEMCACHED_STAT" "3" "October 18, 2011" "1.01" "libmemcached"
   2 .SH NAME
   3 memcached_stat \- libmemcached Documentation
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  34 Get memcached statistics
  35 .SH SYNOPSIS
  36 .sp
  37 #include <libmemcached/memcached.h>
  38 .INDENT 0.0
  39 .TP
  40 .B memcached_stat_st *memcached_stat (memcached_st *ptr, char *args, memcached_return_t *error);
  41 .UNINDENT
  42 .INDENT 0.0
  43 .TP
  44 .B memcached_return_t memcached_stat_servername (memcached_stat_st *stat, char *args, const char *hostname, unsigned int port);
  45 .UNINDENT
  46 .INDENT 0.0
  47 .TP
  48 .B char * memcached_stat_get_value (memcached_st *ptr, memcached_stat_st *stat, const char *key, memcached_return_t *error);
  49 .UNINDENT
  50 .INDENT 0.0
  51 .TP
  52 .B char ** memcached_stat_get_keys (memcached_st *ptr, memcached_stat_st *stat, memcached_return_t *error);
  53 .UNINDENT
  54 .INDENT 0.0
  55 .TP
  56 .B memcached_return_t memcached_stat_execute (memcached_st *memc, const char *args, memcached_stat_fn func, void *context);
  57 .UNINDENT
  58 .sp
  59 Compile and link with \-lmemcached
  60 .SH DESCRIPTION
  61 .sp
  62 libmemcached(3) has the ability to query a memcached server (or collection
  63 of servers) for their current state. Queries to find state return a
  64 \fBmemcached_stat_st\fP structure. You are responsible for freeing this structure. While it is possible to access the structure directly it is not advisable. \fBmemcached_stat_get_value()\fP has been provided to query the structure.
  65 .sp
  66 \fBmemcached_stat_execute()\fP uses the servers found in \fBmemcached_stat_st\fP and executes a "stat" command on each server. args is an optional argument that can be passed in to modify the behavior of "stats". You will need to supply a callback function that will be supplied each pair of values returned by
  67 the memcached server.
  68 .sp
  69 \fBmemcached_stat()\fP fetches an array of \fBmemcached_stat_st\fP structures containing the state of all available memcached servers. The return value must be freed by the calling application. If called with the \fBMEMCACHED_BEHAVIOR_USE_UDP\fP behavior set, a NULL value is returned and the error parameter is set to \fBMEMCACHED_NOT_SUPPORTED\fP.
  70 .sp
  71 \fBmemcached_stat_servername()\fP can be used standalone without a \fBmemcached_st\fP to obtain the state of a particular server.  "args" is used to define a particular state object (a list of these are not provided for by either
  72 the \fBmemcached_stat_get_keys()\fP call nor are they defined in the memcached protocol). You must specify the hostname and port of the server you want to
  73 obtain information on.
  74 .sp
  75 \fBmemcached_stat_get_value()\fP returns the value of a particular state key. You specify the key you wish to obtain.  The key must be null terminated.
  76 .sp
  77 \fBmemcached_stat_get_keys()\fP returns a list of keys that the server has state objects on. You are responsible for freeing this list.
  78 .sp
  79 A command line tool, memstat(1), is provided so that you do not have to write
  80 an application to do this.
  81 .SH RETURN
  82 .sp
  83 Varies, see particular functions.
  84 .sp
  85 Any method returning a \fBmemcached_stat_st\fP expects you to free the
  86 memory allocated for it.
  87 .SH HOME
  88 .sp
  89 To find out more information please check:
  90 \fI\%http://libmemcached.org/\fP
  91 .SH AUTHOR
  92 .sp
  93 Brian Aker, <\fI\%brian@tangent.org\fP>
  94 .SH SEE ALSO
  95 .sp
  96 \fImemcached(1)\fP \fIlibmemcached(3)\fP \fImemcached_strerror(3)\fP
  97 .SH AUTHOR
  98 Brian Aker
  99 .SH COPYRIGHT
 100 2011, Brian Aker DataDifferential, http://datadifferential.com/
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