<flagname="collectd_plugins_aggregation">Build the aggregation plugin (aggregates multiplte values into a single value)</flag>
<flagname="collectd_plugins_amqp">Build the AMQP output plugin (transmits or receives values collected by collectd via the Advanced Message Queuing Protocol (AMQP))</flag>
<flagname="collectd_plugins_apache">Build the apache input plugin (collects statistics from Apache's mod_status module)</flag>
<flagname="collectd_plugins_apcups">Build the apcups input plugin (reads various statistics about a connected uninterruptible power supply (UPS))</flag>
<flagname="collectd_plugins_ascent">Build the ascent input plugin (reads and parses the statistics page of Ascent)</flag>
<flagname="collectd_plugins_battery">Build the battery input plugin (collects the battery's charge, the drawn current and the battery's voltage)</flag>
<flagname="collectd_plugins_bind">Build the bind input plugin (collects statistics from bind instances)</flag>
<flagname="collectd_plugins_ceph">Build the Ceph input plugin (collects statistics from the Ceph distributed storage system)</flag>
<flagname="collectd_plugins_cgroups">Build the cgroups input plugin (collects CPU accounting information for processes in a cgroup)</flag>
<flagname="collectd_plugins_conntrack">Build the conntrack input plugin (tracks the number of entries in Linux's connection tracking table)</flag>
<flagname="collectd_plugins_contextswitch">Build the contextswitch input plugin (collects the number of context switches done by the operating system)</flag>
<flagname="collectd_plugins_cpu">Build the cpu input plugin (collects the amount of time spent by the CPU in various states)</flag>
<flagname="collectd_plugins_cpufreq">Build the cpufreq input plugin (collects the current CPU's frequency)</flag>
<flagname="collectd_plugins_csv">Build the csv output plugin (writes to comma separated values (CSV) files)</flag>
<flagname="collectd_plugins_curl">Build the curl input plugin (reads streams using <pkg>net-misc/curl</pkg> and then parses them according to the configuration)</flag>
<flagname="collectd_plugins_curl_json">Build the curl_json input plugin (queries JavaScript Object Notation (JSON) data using <pkg>net-misc/curl</pkg> and parses it according to the user's configuration using <pkg>dev-libs/yajl</pkg>)</flag>
<flagname="collectd_plugins_curl_xml">Build the curl_xml input plugin (reads files using <pkg>net-misc/curl</pkg> and parses it as Extensible Markup Language (XML))</flag>
<flagname="collectd_plugins_dbi">Build the dbi input plugin (executes SQL statements on databases and reads back the result)</flag>
<flagname="collectd_plugins_df">Build the df input plugin (collects file system usage information, i. e. basically how much space on a mounted partition is used and how much is available)</flag>
<flagname="collectd_plugins_disk">Build the disk input plugin (collects performance statistics of disks and, where supported, partitions)</flag>
<flagname="collectd_plugins_dns">Build the dns input plugin (collects statistics of your DNS traffic on port udp/53 using <pkg>net-libs/libpcap</pkg>)</flag>
<flagname="collectd_plugins_fhcount">Build the file handles input plugin (reports the number of used file handles)</flag>
<flagname="collectd_plugins_filecount">Build the filecount input plugin (counts the number of files in a directory and all its subdirectories)</flag>
<flagname="collectd_plugins_fscache">Build the fscache input plugin (collects information about the file-system based caching infrastructure for network file-systems and other slow media)</flag>
<flagname="collectd_plugins_genericjmx">Build the GenericJMX input plugin (reads Managed Beans (MBeans) from an MBeanServer using JMX input plugin; Requires JAVA)</flag>
<flagname="collectd_plugins_gmond">Build the gmond input plugin (receives data from gmond, the client daemon of the Ganglia project)</flag>
<flagname="collectd_plugins_hddtemp">Build the hddtemp input plugin (collects the temperature of disks from hddtemp daemon)</flag>
<flagname="collectd_plugins_interface">Build the interface input plugin (collects information about the traffic, packets per second and errors of interfaces)</flag>
<flagname="collectd_plugins_ipc">Build the IPC input plugin (collects information related to shared memory)</flag>
<flagname="collectd_plugins_ipmi">Build the ipmi input plugin (reads hardware sensors from servers using the Intelligent Platform Management Interface (IPMI))</flag>
<flagname="collectd_plugins_iptables">Build the iptables input plugin (collects statistics from a ip_tables based packet filter)</flag>
<flagname="collectd_plugins_ipvs">Build the IPVS input plugin (collects statistics from Linux IP Virtual Server)</flag>
<flagname="collectd_plugins_irq">Build the irq input plugin (collects the number of times each interrupt has been handled by the operating system)</flag>
<flagname="collectd_plugins_load">Build the load input plugin (collects the system load)</flag>
<flagname="collectd_plugins_logfile">Build the logfile output plugin (receives log messages from collectd and writes them to a text file)</flag>
<flagname="collectd_plugins_log_logstash">Build the Logstash output plugin (writes collectd logs and events as Logstash JSON formatted events)</flag>
<flagname="collectd_plugins_lvm">Build the LVM input plugin (collects the size of logical volumes (LV) and free space inside a volume group (VG) from Linux' Logical Volume Manager (LVM))</flag>
<flagname="collectd_plugins_madwifi">Build the madwifi input plugin (collects information about Atheros wireless LAN chipsets from the MadWifi driver)</flag>
<flagname="collectd_plugins_mbmon">Build the mbmon input plugin (collects information from mainboard sensors)</flag>
<flagname="collectd_plugins_md">Build the md input plugin (reports the number of disks in various states in Linux software RAID devices)</flag>
<flagname="collectd_plugins_memcachec">Build the memcachec input plugin (queries one or more given pages from a memcached instance and parses the returned data according to user specification)</flag>
<flagname="collectd_plugins_memcached">Build the memcached input plugin (collects statistics from memcached daemon)</flag>
<flagname="collectd_plugins_memory">Build the memory input plugin (collects physical memory utilization)</flag>
<flagname="collectd_plugins_modbus">Build the Modbus input plugin (reads register values from a Modbus "slave" via Modbus/TCP)</flag>
<flagname="collectd_plugins_multimeter">Build the multimeter input plugin (reads a voltage or current from a multimeter connected to a serial bus)</flag>
<flagname="collectd_plugins_mysql">Build the mysql input plugin (collects values from 'SHOW STATUS' command of a MySQL server)</flag>
<flagname="collectd_plugins_netlink">Build the netlink input plugin (collects statistics for interfaces, qdiscs, classes and filters using netlink socket)</flag>
<flagname="collectd_plugins_network">Build the network input/output plugin (send values to other and/or receive values from from other collectd instances)</flag>
<flagname="collectd_plugins_nfs">Build the nfs input plugin (collects information about the usage of the Network File System (NFS))</flag>
<flagname="collectd_plugins_nginx">Build the nginx input plugin (collects number of requests handled and the number of current connections by connection state by the nginx daemon)</flag>
<flagname="collectd_plugins_notify_desktop">Build the notify_desktop output plugin (uses <pkg>x11-libs/libnotify</pkg> to display notifications to the user)</flag>
<flagname="collectd_plugins_notify_email">Build the notify_email output plugin (uses <pkg>net-libs/libesmtp</pkg> to send notifications to a configured email address)</flag>
<flagname="collectd_plugins_ntpd">Build the ntpd input plugin (collects statistics from a NTP server)</flag>
<flagname="collectd_plugins_numa">Build the numa input plugin (collects statistics of the Linux Non-Uniform Memory Access (NUMA) subsystem)</flag>
<flagname="collectd_plugins_postgresql">Build the postgresql input plugin (executes SQL statements against a PostgreSQL database)</flag>
<flagname="collectd_plugins_powerdns">Build the powerdns input plugin (collects statistics from the PowerDNS name server or recursor via control socket)</flag>
<flagname="collectd_plugins_processes">Build the processes input plugin (collects the number of processes, grouped by their state or detailed statistics about selected processes)</flag>
<flagname="collectd_plugins_protocols">Build the protocols input plugin (collects information about the network protocols supported by the system)</flag>
<flagname="collectd_plugins_teamspeak2">Build the teamspeak2 input plugin (collects traffic statistics from a teamspeak2 instance)</flag>
<flagname="collectd_plugins_ted">Build the ted input plugin (connects to The Energy Detective and reads the current power over connected power lines)</flag>
<flagname="collectd_plugins_threshold">Build the threshold plugin (checks values against configured thresholds and creates notifications if values are out of bounds)</flag>
<flagname="collectd_plugins_tokyotyrant">Build the tokyotyrant input plugin (collects number of records and file size from a running Tokyo Tyrant server)</flag>
<flagname="collectd_plugins_turbostat">Build the turbostat input plugin (reads CPU frequency and C-state residency on modern Intel turbo-capable processors)</flag>
<flagname="collectd_plugins_unixsock">Build the unixsock input/output plugin (opens a UNIX domain socket and accepts connections)</flag>
<flagname="collectd_plugins_uptime">Build the uptime input plugin (keeps track of the system uptime)</flag>
<flagname="collectd_plugins_users">Build the users input plugin (counts the number of users currently logged into the system)</flag>
<flagname="collectd_plugins_varnish">Build the varnish input plugin (collects information about Varnish)</flag>
<flagname="collectd_plugins_virt">Build the (lib)virt input plugin (collects statistics about virtualized guests on a system)</flag>
<flagname="collectd_plugins_vmem">Build the vmem input plugin (collects information about the virtual memory subsystem of the kernel)</flag>
<flagname="collectd_plugins_vserver">Build the vserver input plugin (collects information about the virtual servers running on a system, using Linux-Vserver)</flag>
<flagname="collectd_plugins_wireless">Build the wireless input plugin (collects signal quality, signal power and signal-to-noise ratio for wireless LAN cards)</flag>
<flagname="collectd_plugins_write_graphite">Build the write_graphite output plugin (stores values in Carbon, the storage layer of Graphite)</flag>
<flagname="collectd_plugins_write_http">Build the write_http output plugin (sends metrics to a web-server using HTTP POST requests)</flag>
<flagname="collectd_plugins_write_log">Build the write_log output plugin (writes metrics to a file)</flag>
<flagname="collectd_plugins_write_redis">Build the Redis output plugin (stores values in Redis)</flag>
<flagname="collectd_plugins_write_riemann">Build the Riemann output plugin (stores values in Riemann, a stream processing and monitoring system)</flag>
<flagname="collectd_plugins_write_sensu">Build the Sensu output plugin (sends metrics to Sensu Core, an open-source monitoring project)</flag>
<flagname="collectd_plugins_write_tsdb">Build the TSDB output plugin (writes metrics to OpenTSDB, an open-source distributed time-series database based on Apache HBase)</flag>
<flagname="collectd_plugins_zfs_arc">Build the ZFS ARC input plugin (reports information such as the cache size, the various hits and misses (also as a ratio) and the transferred data)</flag>
<flagname="collectd_plugins_zookeeper">Build the zookeeper input plugin (reads data from Apache Zookeeper MNTR command)</flag>