src/collectd.pod

   1 =head1 NAME
   2
   3 collectd - System statistics collection daemon
   4
   5 =head1 SYNOPSIS
   6
   7 collectd I<[options]>
   8
   9 =head1 DESCRIPTION
  10
  11 collectd is a daemon that collects various system statistics periodically and
  12 stores them into RRD-files. Which data is collected depends on compile-time
  13 settings. The following features may be available:
  14
  15 =over 4
  16
  17 =item
  18
  19 Apache server stats (I<apache>)
  20
  21 =item
  22
  23 Apple hardware sensors (I<apple_sensors>, Darwin only)
  24
  25 =item
  26
  27 Battery status (I<battery>)
  28
  29 =item
  30
  31 CPU utilization (I<cpu>)
  32
  33 =item
  34
  35 Mountpoint usage (I<df>)
  36
  37 =item
  38
  39 Disk and partition usage/throughput (I<disk>)
  40
  41 =item
  42
  43 DNS traffic (I<dns>)
  44
  45 =item
  46
  47 Email usage (I<email>)
  48
  49 =item
  50
  51 Harddisk temperatures (I<hddtemp>)
  52
  53 =item
  54
  55 Irq (I<irq>)
  56
  57 =item
  58
  59 System load averages (I<load>)
  60
  61 =item
  62
  63 Motherboard monitor (I<mbmon>)
  64
  65 =item
  66
  67 Memory usage (I<memory>)
  68
  69 =item
  70
  71 MySQL statistics (I<mysql>)
  72
  73 =item
  74
  75 NFS utilization (I<nfs>, Linux only)
  76
  77 =item
  78
  79 Network latency (I<ping>)
  80
  81 =item
  82
  83 Number of processes (I<processes>, Linux only)
  84
  85 =item
  86
  87 lm_sensors information (I<sensors>, Linux only)
  88
  89 =item
  90
  91 Serial port traffic (I<serial>, Linux only)
  92
  93 =item
  94
  95 Swap usage (I<swap>)
  96
  97 =item
  98
  99 Tape drive usage (I<tape>, Solaris only)
 100
 101 =item
 102
 103 Network traffic (I<traffic>)
 104
 105 =item
 106
 107 Number of users logged into the system (I<users>)
 108
 109 =item
 110
 111 System ressources used by VServers (I<vserver>)
 112
 113 =item
 114
 115 Wireless network stats (I<wireless>)
 116
 117 =back
 118
 119 =head1 OPTIONS
 120
 121 =over 4
 122
 123 =item B<-C> I<E<lt>config-fileE<gt>>
 124
 125 Specify an alternative config file. This is the place to go when you wish to
 126 change B<collectd>'s behavior. The path may be relative to the current working
 127 directory.
 128
 129 =item B<-P> I<E<lt>pid-fileE<gt>>
 130
 131 Specify an alternative pid file. This overwrites any settings in the config
 132 file. This is thought for init-scripts that require the PID-file in a certain
 133 directory to work correctly. For everyday-usage use the B<PIDFile>
 134 config-option.
 135
 136 =item B<-f>
 137
 138 Don't fork to the background. I<collectd> will also B<not> close standard file
 139 descriptors, detach from the session nor write a pid file. This is mainly
 140 thought for 'supervisioning' init replacements such as I<runit>.
 141
 142 =item B<-h>
 143
 144 Output usage information and exit.
 145
 146 =back
 147
 148 =head1 MODES
 149
 150 collectd can operate in four different operating modes. The modes are described
 151 below.
 152
 153 The simplest mode is the so called B<local mode>. Data is collected locally and
 154 written in RRD files that reside in I<DataDir>. This is the default mode when
 155 collectd is linked against C<librrd>.
 156
 157 The modes B<client mode> and B<server mode> are used to send data over a
 158 network and receive it again.
 159
 160 In B<client mode> the daemon collects the data locally and sends its results
 161 to one or more network addresses. No RRD files are written locally in this
 162 case. If collectd is not linked against C<librrd> this is the default mode.
 163
 164 If started in B<server mode> the daemon will listen on one or more interfaces
 165 and write the data it receives to RRD files. No data is collected locally.
 166
 167 In the last mode, B<log mode>, data is collected locally and written in
 168 text files that reside in I<DataDir>.
 169
 170 Please refer to L<collectd.conf(5)> for the configuration options and default
 171 values.
 172
 173 =head1 SPECIAL PLUGINS
 174
 175 =head2 apache
 176
 177 This module connects to an Apache webserver and expects the output produced by
 178 B<mod_status.c>. If requires B<libcurl> to set up the HTTP connection and issue
 179 the request(s). The following is a sample config for the Apache webserver. The
 180 use of C<ExtendedStatus on> is mandatory.
 181
 182   ExtendedStatus on
 183   <IfModule mod_status.c>
 184     <Location /mod_status>
 185       SetHandler server-status
 186     </Location>
 187   </IfModule>
 188
 189 This plugin requires further configuration. Please read L<collectd.conf(5)>.
 190
 191 =head2 cpufreq
 192
 193 This module reads F</sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq> (for
 194 the first CPU installed) to get the current CPU frequency. If this file does
 195 not exist make sure B<cpufreqd> (L<http://cpufreqd.sourceforge.net/>) or a
 196 similar tool is installed and an "cpu governor" (that's kernel module) is
 197 loaded.
 198
 199 =head2 email
 200
 201 This plugin collects data indirectly by providing a UNIX socket that external
 202 programs can connect to. A simple line based protocol is used to communicate
 203 with the plugin:
 204
 205 E-Mail type (e.g. "ham", "spam", "virus", ...) and size (bytes):
 206
 207   e:<type>:<size>
 208
 209 If C<size> is less than or equal to zero, C<size> is ignored.
 210
 211 Spam score:
 212
 213   s:<value>
 214
 215 Successful spam checks (e.g. "BAYES_99", "SUBJECT_DRUG_GAP_C", ...):
 216
 217   c:<type1>[,<type2>,...]
 218
 219 Each line is limited to 256 characters (including the newline character).
 220 Longer lines will be ignored.
 221
 222 =head2 mysql
 223
 224 Requires B<mysqlclient> to be installed. It connects to the database when
 225 started and keeps the connection up as long as possible. When the connection is
 226 interrupted for whatever reason it will try to re-connect. The syslog will
 227 contain loud complaints in case anything goes wrong.
 228
 229 This plugin issues C<SHOW STATUS> and evaluates C<Bytes_{received,sent}>,
 230 C<Com_*> and C<Handler_*> which correspond to F<traffic-mysql.rrd>,
 231 F<mysql_commands-*.rrd> and F<mysql_handler-*.rrd>. Also, the values of
 232 C<Qcache_*> are put in F<mysql_qcache.rrd> and values of C<Threads_*> are put
 233 in F<mysql_threads.rrd>. Please refer to the B<MySQL reference manual>,
 234 I<5.2.4. Server Status Variables> for an explanation of these values.
 235
 236 =head2 sensors
 237
 238 The B<sensors> module uses lm_sensors to retrieve sensor-values. This means
 239 that all the needed modules have to be loaded and lm_sensors has to be
 240 configured (most likely by editing F</etc/sensors.conf>. Read
 241 L<sensors.conf(5)> for details.
 242
 243 The B<lm_sensors> homepage can be found at
 244 L<http://secure.netroedge.com/~lm78/>.
 245
 246 =head2 mbmon
 247
 248 The B<mbmon> module uses mbmon to retrieve temperature, voltage, etc.
 249
 250 collectd connects to B<localhost> (127.0.0.1), port B<411/tcp>.
 251 The B<Host> and B<Port> options can be used to change these
 252 default values. See L<collectd.conf(5)> for details. C<mbmon> has to be
 253 running to work correctly. If C<mbmon> is not running timeouts may appear
 254 which may interfere with other statistics..
 255
 256 C<mbmon> must be run with the -r option ("print TAG and Value format");
 257 Debian's /etc/init.d/mbmon script already does this, other people
 258 will need to ensure that this is the case.
 259
 260 =head2 hddtemp
 261
 262 To get values from B<hddtemp> collectd connects to B<localhost> (127.0.0.1),
 263 port B<7634/tcp>. The B<Host> and B<Port> options can be used to change these
 264 default values. See L<collectd.conf(5)> for details. C<hddtemp> has to be
 265 running to work correctly. If C<hddtemp> is not running timeouts may appear
 266 which may interfere with other statistics..
 267
 268 The B<hddtemp> homepage can be found at
 269 L<http://www.guzu.net/linux/hddtemp.php>.
 270
 271 =head2 vserver
 272
 273 B<VServer> support is only available for Linux. It cannot yet be found in a
 274 vanilla kernel, though. To make use of this plugin you need a kernel that has
 275 B<VServer> support built in, i.e. you need to apply the patches and compile
 276 your own kernel, which will then provide the /proc/virtual filesystem that is
 277 required by this plugin.
 278
 279 The B<VServer> homepage can be found at L<http://linux-vserver.org/>.
 280
 281 =head1 RRD FILES
 282
 283 The RRD files are created automatically. The size of the RRAs depend on the
 284 compile time settings of I<step> and I<width>. With the default values (I<step>
 285 = B<10>, I<width> = B<1200>) the following RRAs are created:
 286
 287   RRA:AVERAGE:0.1:1:8640
 288   RRA:AVERAGE:0.1:50:1210
 289   RRA:AVERAGE:0.1:223:1202
 290   RRA:AVERAGE:0.1:2635:1201
 291   RRA:MIN:0.1:1:8640
 292   RRA:MIN:0.1:50:1210
 293   RRA:MIN:0.1:223:1202
 294   RRA:MIN:0.1:2635:1201
 295   RRA:MAX:0.1:1:8640
 296   RRA:MAX:0.1:50:1210
 297   RRA:MAX:0.1:223:1202
 298   RRA:MAX:0.1:2635:1201
 299
 300 By default collectd uses a 10 second I<step>. Thus the RRAs contain the
 301 following timespans. If you've changed the I<step> at compile time you will
 302 have calculate resolution and timespan yourself.
 303
 304   PDP per CDP |  Resolution  | Data points | Timespan
 305   ------------+--------------+-------------+---------
 306             1 | 10.0 seconds !        8640 ! 1 day
 307            50 |  8.3 minutes |        1210 | 1 week
 308           223 | 37.2 minutes |        1202 | 1 month
 309          2635 |  7.3 hours   |        1201 | 1 year
 310
 311 The DS'es depend on the module creating the RRD files:
 312
 313 =over 4
 314
 315 =item Apache traffic (F<apache/apache_bytes.rrd>)
 316
 317   DS:count:COUNTER:HEARTBEAT:0:134217728
 318
 319 =item Apache requests (F<apache/apache_requests.rrd>)
 320
 321   DS:count:COUNTER:HEARTBEAT:0:1048576
 322
 323 =item Apache scoreboard (F<apache/apache_scoreboard-I<E<lt>nameE<gt>>.rrd>)
 324
 325   DS:count:GAUGE:HEARTBEAT:0:U
 326
 327 =item Apple temperature sensor (F<apple_sensors/temperature-I<E<lt>nameE<gt>>.rrd>)
 328
 329   DS:value:GAUGE:HEARTBEAT:U:U
 330
 331 =item Apple fanspeed sensor (F<apple_sensors/fanspeed-I<E<lt>nameE<gt>>.rrd>)
 332
 333   DS:value:GAUGE:HEARTBEAT:U:U
 334
 335 =item Battery charge (F<battery-I<E<lt>nameE<gt>>/charge.rrd>)
 336
 337   DS:charge:GAUGE:HEARTBEAT:0:U
 338
 339 =item Battery current (F<battery-I<E<lt>nameE<gt>>/current.rrd>)
 340
 341   DS:current:GAUGE:HEARTBEAT:U:U
 342
 343 =item Battery voltage (F<battery-I<E<lt>nameE<gt>>/voltage.rrd>)
 344
 345   DS:voltage:GAUGE:HEARTBEAT:U:U
 346
 347 =item CPU (F<cpu-I<E<lt>numE<gt>>.rrd>)
 348
 349   DS:user:COUNTER:HEARTBEAT:0:100
 350   DS:nice:COUNTER:HEARTBEAT:0:100
 351   DS:syst:COUNTER:HEARTBEAT:0:100
 352   DS:idle:COUNTER:HEARTBEAT:0:100
 353   DS:wait:COUNTER:HEARTBEAT:0:100
 354
 355 =item CPU frequency (F<cpufreq-I<E<lt>numE<gt>>.rrd>)
 356
 357   DS:value:GAUGE:HEARTBEAT:0:U
 358
 359 =item Mountpoints (F<df-I<E<lt>pathE<gt>>.rrd>)
 360
 361   DS:used:GAUGE:HEARTBEAT:0:U
 362   DS:free:GAUGE:HEARTBEAT:0:U
 363
 364 =item Diskstats (F<disk-I<E<lt>majorE<gt>>-I<E<lt>minorE<gt>>.rrd>)
 365
 366   DS:rcount:COUNTER:HEARTBEAT:0:U
 367   DS:rmerged:COUNTER:HEARTBEAT:0:U
 368   DS:rbytes:COUNTER:HEARTBEAT:0:U
 369   DS:rtime:COUNTER:HEARTBEAT:0:U
 370   DS:wcount:COUNTER:HEARTBEAT:0:U
 371   DS:wmerged:COUNTER:HEARTBEAT:0:U
 372   DS:wbytes:COUNTER:HEARTBEAT:0:U
 373   DS:wtime:COUNTER:HEARTBEAT:0:U
 374
 375 =item Diskstats (F<partition-I<E<lt>majorE<gt>>-I<E<lt>minorE<gt>>.rrd>)
 376
 377   DS:rcount:COUNTER:HEARTBEAT:0:U
 378   DS:rbytes:COUNTER:HEARTBEAT:0:U
 379   DS:wcount:COUNTER:HEARTBEAT:0:U
 380   DS:wbytes:COUNTER:HEARTBEAT:0:U
 381
 382 =item E-Mail count (F<email/email-I<E<lt>typeE<gt>>.rrd>)
 383
 384   DS:count:GAUGE:HEARTBEAT:0:U
 385
 386 =item E-Mail size (F<email/email_size-I<E<lt>typeE<gt>>.rrd>)
 387
 388   DS:size:GAUGE:HEARTBEAT:0:U
 389
 390 =item HDD Temperature (F<hddtemp-I<E<lt>majorE<gt>>-I<E<lt>minorE<gt>>.rrd>)
 391
 392   DS:value:GAUGE:HEARTBEAT:U:U
 393
 394 =item Irq (F<irq-I<E<lt>irqnumberE<gt>>.rrd>)
 395
 396   DS:value:COUNTER:HEARTBEAT:0:65535
 397
 398 =item System load (F<load.rrd>)
 399
 400   DS:shortterm:GAUGE:HEARTBEAT:0:100
 401   DS:midterm:GAUGE:HEARTBEAT:0:100
 402   DS:longterm:GAUGE:HEARTBEAT:0:100
 403
 404 =item Memory usage (F<memory.rrd>)
 405
 406   DS:used:GAUGE:HEARTBEAT:0:9223372036854775807
 407   DS:free:GAUGE:HEARTBEAT:0:9223372036854775807
 408   DS:buffers:GAUGE:HEARTBEAT:0:9223372036854775807
 409   DS:cached:GAUGE:HEARTBEAT:0:9223372036854775807
 410
 411 =item MySQL commands and handlers (F<mysql_commands-I<E<lt>commandE<gt>>.rrd> and F<mysql_handler-I<E<lt>handlerE<gt>>.rrd>)
 412
 413   DS:value:COUNTER:HEARTBEAT:0:U
 414
 415 =item MySQL query cache (F<mysql_qcache.rrd>)
 416
 417   DS:hits:COUNTER:HEARTBEAT:0:U
 418   DS:inserts:COUNTER:HEARTBEAT:0:U
 419   DS:not_cached:COUNTER:HEARTBEAT:0:U
 420   DS:lowmem_prunes:COUNTER:HEARTBEAT:0:U
 421   DS:queries_in_cache:GAUGE:HEARTBEAT:0:U
 422
 423 =item MySQL threads (F<mysql_threads.rrd>)
 424
 425   DS:running:GAUGE:HEARTBEAT:0:U
 426   DS:connected:GAUGE:HEARTBEAT:0:U
 427   DS:cached:GAUGE:HEARTBEAT:0:U
 428   DS:created:COUNTER:HEARTBEAT:0:U
 429
 430 =item NFSv2 Procedures (F<nfs2_procedures-I<(client|server)>.rrd>)
 431
 432   DS:null:COUNTER:HEARTBEAT:0:U
 433   DS:getattr:COUNTER:HEARTBEAT:0:U
 434   DS:setattr:COUNTER:HEARTBEAT:0:U
 435   DS:root:COUNTER:HEARTBEAT:0:U
 436   DS:lookup:COUNTER:HEARTBEAT:0:U
 437   DS:readlink:COUNTER:HEARTBEAT:0:U
 438   DS:read:COUNTER:HEARTBEAT:0:U
 439   DS:wrcache:COUNTER:HEARTBEAT:0:U
 440   DS:write:COUNTER:HEARTBEAT:0:U
 441   DS:create:COUNTER:HEARTBEAT:0:U
 442   DS:remove:COUNTER:HEARTBEAT:0:U
 443   DS:rename:COUNTER:HEARTBEAT:0:U
 444   DS:link:COUNTER:HEARTBEAT:0:U
 445   DS:symlink:COUNTER:HEARTBEAT:0:U
 446   DS:mkdir:COUNTER:HEARTBEAT:0:U
 447   DS:rmdir:COUNTER:HEARTBEAT:0:U
 448   DS:readdir:COUNTER:HEARTBEAT:0:U
 449   DS:fsstat:COUNTER:HEARTBEAT:0:U
 450
 451 =item NFSv3 Procedures (F<nfs3_procedures-I<(client|server)>.rrd>)
 452
 453   DS:null:COUNTER:HEARTBEAT:0:U
 454   DS:getattr:COUNTER:HEARTBEAT:0:U
 455   DS:setattr:COUNTER:HEARTBEAT:0:U
 456   DS:lookup:COUNTER:HEARTBEAT:0:U
 457   DS:access:COUNTER:HEARTBEAT:0:U
 458   DS:readlink:COUNTER:HEARTBEAT:0:U
 459   DS:read:COUNTER:HEARTBEAT:0:U
 460   DS:write:COUNTER:HEARTBEAT:0:U
 461   DS:create:COUNTER:HEARTBEAT:0:U
 462   DS:mkdir:COUNTER:HEARTBEAT:0:U
 463   DS:symlink:COUNTER:HEARTBEAT:0:U
 464   DS:mknod:COUNTER:HEARTBEAT:0:U
 465   DS:remove:COUNTER:HEARTBEAT:0:U
 466   DS:rmdir:COUNTER:HEARTBEAT:0:U
 467   DS:rename:COUNTER:HEARTBEAT:0:U
 468   DS:link:COUNTER:HEARTBEAT:0:U
 469   DS:readdir:COUNTER:HEARTBEAT:0:U
 470   DS:readdirplus:COUNTER:HEARTBEAT:0:U
 471   DS:fsstat:COUNTER:HEARTBEAT:0:U
 472   DS:fsinfo:COUNTER:HEARTBEAT:0:U
 473   DS:pathconf:COUNTER:HEARTBEAT:0:U
 474   DS:commit:COUNTER:HEARTBEAT:0:U
 475
 476 =item Network latency / Ping (F<ping-I<E<lt>hostnameE<gt>>.rrd>)
 477
 478   DS:ping:GAUGE:HEARTBEAT:0:65535
 479
 480 =item Processes (F<processes.rrd>)
 481
 482   DS:running:GAUGE:HEARTBEAT:0:65535
 483   DS:sleeping:GAUGE:HEARTBEAT:0:65535
 484   DS:zombies:GAUGE:HEARTBEAT:0:65535
 485   DS:stopped:GAUGE:HEARTBEAT:0:65535
 486   DS:paging:GAUGE:HEARTBEAT:0:65535
 487   DS:blocked:GAUGE:HEARTBEAT:0:65535
 488
 489 =item lm_sensors fanspeed sensor (F<sensors-I<E<lt>instE<gt>>.rrd> or F<lm_sensors-I<E<lt>chipE<gt>>/fanspeed-I<E<lt>instE<gt>>.rrd>)
 490
 491   DS:value:GAUGE:HEARTBEAT:U:U
 492
 493 =item lm_sensors temperature sensor (F<sensors-I<E<lt>instE<gt>>.rrd> or F<lm_sensors-I<E<lt>chipE<gt>>/temperature-I<E<lt>instE<gt>>.rrd>)
 494
 495   DS:value:GAUGE:HEARTBEAT:U:U
 496
 497 =item lm_sensors voltage sensor (F<sensors-I<E<lt>instE<gt>>.rrd> or F<lm_sensors-I<E<lt>chipE<gt>>/voltage-I<E<lt>instE<gt>>.rrd>)
 498
 499   DS:voltage:GAUGE:HEARTBEAT:U:U
 500
 501 =item Serial port traffic (F<serial-I<E<lt>numE<gt>>.rrd>)
 502
 503   DS:incoming:COUNTER:HEARTBEAT:0:U
 504   DS:outgoing:COUNTER:HEARTBEAT:0:U
 505
 506 =item Spam score (F<email/spam_score.rrd>)
 507
 508   DS:score:GAUGE:HEARTBEAT:0:U
 509
 510 =item Spam checks (F<email/spam_check-I<E<lt>typeE<gt>>.rrd>)
 511
 512   DS:hits:GAUGE:HEARTBEAT:0:U
 513
 514 =item Swap usage (F<swap.rrd>)
 515
 516   DS:used:GAUGE:HEARTBEAT:0:1099511627776
 517   DS:free:GAUGE:HEARTBEAT:0:1099511627776
 518   DS:cached:GAUGE:HEARTBEAT:0:1099511627776
 519   DS:resv:GAUGE:HEARTBEAT:0:1099511627776
 520
 521 =item Tape drive usage (F<tape-I<E<lt>nameE<gt>>.rrd>)
 522
 523   DS:rcount:COUNTER:HEARTBEAT:0:
 524   DS:rmerged:COUNTER:HEARTBEAT:0:U
 525   DS:rbytes:COUNTER:HEARTBEAT:0:U
 526   DS:rtime:COUNTER:HEARTBEAT:0:U
 527   DS:wcount:COUNTER:HEARTBEAT:0:U
 528   DS:wmerged:COUNTER:HEARTBEAT:0:U
 529   DS:wbytes:COUNTER:HEARTBEAT:0:U
 530   DS:wtime:COUNTER:HEARTBEAT:0:U
 531
 532 =item Network traffic (F<traffic-I<E<lt>interfaceE<gt>>.rrd>)
 533
 534   DS:incoming:COUNTER:HEARTBEAT:0:U
 535   DS:outgoing:COUNTER:HEARTBEAT:0:U
 536
 537 =item Interface packets (F<if_packets-I<E<lt>interfaceE<gt>>.rrd>)
 538
 539   DS:rx:COUNTER:HEARTBEAT:0:U
 540   DS:tx:COUNTER:HEARTBEAT:0:U
 541
 542 =item Interface errors (F<if_errors-I<E<lt>interfaceE<gt>>.rrd>)
 543
 544   DS:rx:COUNTER:HEARTBEAT:0:U
 545   DS:tx:COUNTER:HEARTBEAT:0:U
 546
 547 =item Users (F<users.rrd>)
 548
 549   DS:users:GAUGE:HEARTBEAT:0:65535
 550
 551 =item VServer load (F<vserver-I<E<lt>xidE<gt>>/load.rrd>)
 552
 553   DS:shortterm:GAUGE:HEARTBEAT:0:100
 554   DS:midterm:GAUGE:HEARTBEAT:0:100
 555   DS:longterm:GAUGE:HEARTBEAT:0:100
 556
 557 =item VServer threads (F<vserver-I<E<lt>xidE<gt>>/threads.rrd>)
 558
 559   DS:total:GAUGE:HEARTBEAT:0:65535
 560   DS:running:GAUGE:HEARTBEAT:0:65535
 561   DS:uninterruptible:GAUGE:HEARTBEAT:0:65535
 562   DS:onhold:GAUGE:HEARTBEAT:0:65535
 563
 564 =item VServer network traffic (F<vserver-I<E<lt>xidE<gt>>/traffic-I<E<lt>nameE<gt>>.rrd>)
 565
 566   DS:incoming:COUNTER:HEARTBEAT:0:9223372036854775807
 567   DS:outgoing:COUNTER:HEARTBEAT:0:9223372036854775807
 568   DS:failed:COUNTER:HEARTBEAT:0:9223372036854775807
 569
 570 =item VServer processes (F<vserver-I<E<lt>xidE<gt>>/vs_processes.rrd>)
 571
 572   DS:total:GAUGE:HEARTBEAT:0:65535
 573
 574 =item VServer memory usage (F<vserver-I<E<lt>xidE<gt>>/vs_memory.rrd>)
 575
 576   DS:vm:GAUGE:HEARTBEAT:0:9223372036854775807
 577   DS:vml:GAUGE:HEARTBEAT:0:9223372036854775807
 578   DS:rss:GAUGE:HEARTBEAT:0:9223372036854775807
 579   DS:anon:GAUGE:HEARTBEAT:0:9223372036854775807
 580
 581 =item Wireless link quality (F<wireless-I<E<lt>interfaceE<gt>>.rrd>)
 582
 583   DS:quality:GAUGE:HEARTBEAT:0:U
 584   DS:power:GAUGE:HEARTBEAT:U:0
 585   DS:noise:GAUGE:HEARTBEAT:U:0
 586
 587 =back
 588
 589 =head1 SEE ALSO
 590
 591 L<collectd.conf(5)>, L<rrdtool(1)>, L<sensors(1)>, L<hddtemp(8)>,
 592 L<mbmon(1)>,
 593 L<kstat(3KSTAT)>
 594
 595 =head1 AUTHOR
 596
 597 Florian Forster E<lt>octo@verplant.orgE<gt>
 598
 599 =cut