Probes

Probe configuration parameters and results are Go types. Their conversion to JSON is specific to each Go types Marshal/Unmarshal functions. See Go documentation for details.

Probe tags are always strings.

Ping

Ping sends an ICMP Echo message to a host and reports statistics on the round trip.

Configuration

name description type required
address Target address. An IP or a hostname. string required
interval The wait time between each packet send. time.Duration optional, default 1s
count The number of ICMP packets to send. int optional, default 4
timeout The time to run the ping, until it exits. If the timeout occurs before the packet count has been reached, the probe exits anyway. time.Duration optional, default 10s

Results

name description type
sent the number of packets sent int
received the number of packets received int
min the minimum round trip time, in nanoseconds int64
max the maximum round trip time, in nanoseconds int64
avg the average round trip time, in nanoseconds int64
stddev the standard deviation of round trip times, in nanoseconds int64

Tags

name description
address the address of the target that was pinged

File checksum

Checksum computes the checksum of a file.

Configuration

name description type required
path the path of the file to check string required
hash the hash algorithm to use string (crc32,md5,sha1,sha256) required

Results

name description type
checksum the checksum of the file as a hexadecimal string string

Tags

name description
path the path of the file that was checked

CPU Usage

CPU collects CPU usage statistics.

Configuration

name description type required
per-cpu true collects utilization for each CPU/core, false collects utilization averaged over all CPUs/cores bool required
interval interval over which CPU utilization is calculated time.Duration optional, default 1s

Results

name description type
usage % of utilization float32

Tags

name description
cpu the number of the CPU/core for this result, "all" represents usage averaged over all CPUs/cores

Disk Usage

Disk collects disk usage statistics. Note that the list of available partitions is filtered based on the filesystem. The following filesystems will be removed from the results:

  • autofs
  • binfmt_misc
  • cgroup
  • debugfs
  • devfs
  • devpts
  • devtmpfs
  • dfsfuse_DFS
  • hugetlbfs
  • mqueue
  • nullfs
  • proc
  • pstore
  • securityfs
  • sysfs
  • tmpfs
  • udev

Configuration

None.

Results

name description type
free free space on the disk, in bytes uint64
used used space on the disk, in bytes uint64
used-percent % of disk space left, free / (free + used) float32
inodes-free number of free inodes on the disk uint64
inodes-used number of used inodes on the disk uint64
inodes-used-percent % of inodes left, free / (free + used) float32

Tags

name description
path the mount point of the disk, e.g. /

HTTP request

HTTP sends an HTTP request and collects statistics on the response.

Configuration

name description type required
method HTTP request method (GET, POST, etc.) string optional, default GET
url HTTP request URL string required
body HTTP body of the request string optional
timeout duration before the HTTP request times out time.Duration optional
response-content content from the response to include in the results string (none,headers-only,body-only,full) optional, default none

Results

name description type
rtt time between sending the HTTP request and receiving the response, in nanoseconds int64
status-code the HTTP response's status code int
response-content the HTTP response's content (depending on the probe's configuration) string

System load

Load collects average system load. Load is defined as the numnber of processes waiting for I/O or in the run queue, averaged over a period of time.

Configuration

None.

Results

name description type
load1 System load over the last minute float32
load5 System load over the last 5 minutes float32
load15 System load over the last 15 minutes float32
proc-running Number of processes currently running int
proc-blocked Number of processes currently blocked int

Memory usage

Memory collects memory usage statistics.

Configuration

None.

Results

name description type
total Total amount of RAM on this system, in bytes uint64
available Estimate amount of RAM available to programs, in bytes uint64
used Total amount of RAM used by programs, in bytes uint64
used-percent Percentage of RAM used by programs float32
free Total amout of RAM not used by programs, in bytes uint64
swap-total Total amount of swap memory on this system, in bytes uint64
swap-free Total amout of swap memory not used by programs, in bytes uint64
swap-used Total amount of swap memory used by programs, in bytes uint64
swap-used-percent Percentage of swap memory used by programs float32

Network statistics

Network collects statistics about the network interfaces.

Configuration

name description type required
interfaces A comma-separated list of interfaces to collect information about. If the list is empty, return info about all interfaces. If the parameter is missing, return global information for all interfaces. string optional (see description)

Results

name description type
bytes-sent Number of bytes sent through the interface unit64
bytes-received Number of bytes received through the interface unit64
packets-sent Number of network packets sent through the interface unit64
packets-received Number of network packets receives through the interface unit64
error-in Number of errors while receiving through the interface unit64
error-out Number of errors while sending through the interface unit64
tcp-connections Number of open TCP connections on this interface unit64
udp-connections Number of open UDP connections on this interface unit64

Tags

name description
interface The network interface, e.g. eth0

Process statistics

Process collects statistics and details about the running processes.

Configuration

name description type required
names a comma-separated list of names of the processes to collect info about. A process name is usually the name of the executable that was launched. string required

Results

name description type
command-line The full command-line used to launch this process string
pid The PID of this process int32
create-time The exact time this process started int64
status A character representing the current status of the process. R: Running, S: Sleep, T: Stop, I: Idle, Z: Zombie, W: Wait, L: Lock. string
cpu An approximate percentage of CPU power used by this process float64
memory An approximate percentage of RAM used by this process float64
rss The "Resident Set Size" is the amount of RAM used by this process, in bytes uint64
vms The "Virtual Memory Size" is the total size of memory addressable by this process, in bytes uint64
threads The number of threads this process is currently running uint64
files The number of files currently opened by this process uint64
connections The number of network connections open by this process uint64

Tags

name description
name The name of the process

Redis statistics

Redis collects statistics from a Redis store.

Configuration

name description type required
address the address of the target redis server to gather metric from string required

Results

name description type
connected-clients The number of clients currently connected to this Redis server uint64
blocked-clients The number of clients pending on a blocking call uint64
used-memory The amout of memory allocated by this Redis server, in bytes uint64
mem-frag-ratio The ratio between the memory allocated by Redis and the memory as seen by the operating system. See Redis INFO documentation for details. float32
cache-hit-ratio The cache hit ratio is the ratio between the # cache hits and the # of key requests. float32
uptime The time since the Redis server was launched, in seconds uint64
changes-since-last-save The number of changes since the last time the database was saved to disk. The number of changes that would be lost upon restart. uint64
last-save-time The UNIX timestamp of the last time the database was saved to disk. uint64
ops-per-sec The number of commands processed by the Redis server per second. uint64
rejected-connections The number of connections rejected because of the maximum connections limit. uint64
input-kbps The incoming bandwith usage of the Redis server, in kilobytes per second. uint64
output-kbps The outgoing bandwith usage of the Redis server, in kilobytes per second. uint64
expired-keys Number of keys that have been removed when reaching their expiration date uint64
evicted-keys Number of keys removed (evicted) due to reaching maximum memory. uint64
master-last-io Time in seconds since the last interaction with the master Redis server uint64
master-link-status The current status of the link to the master Redis server string
master-link-down-since The time in seconds since the link between master and slave is down uint64
connected-slaves The number of slave instances connected to the master Redis server uint64

Uptime

Uptime collects the uptime and the bootime of a server.

Configuration

None.

Results

name description type
uptime System uptime (number of seconds since last boot) uint64
boottime System last boot time (expressed in seconds since epoch) uint64

InfluxDB

InfluxDB collects statistics from an InfluxDB server.

Configuration

name description type required
address the address of the target influxdb server to collect metrics about string required

Results

Runtime Statistics

Tracks a subset of the statistics exposed by the Golang memory allocator stats

name description type
runtime-alloc Alloc is bytes of allocated heap objects uint64
runtime-frees Frees is the cumulative count of heap objects freed uint64
runtime-heap-alloc HeapAlloc is bytes of allocated heap objects uint64
runtime-heap-idle HeapIdle is bytes in idle (unused) spans uint64
runtime-heap-in-use HeapInuse is bytes in in-use spans uint64
runtime-heap-objects HeapObjects is the number of allocated heap objects uint64
runtime-heap-released HeapReleased is bytes of physical memory returned to the OS uint64
runtime-heap-sys HeapSys is bytes of heap memory obtained from the OS uint64
runtime-lookups Lookups is the number of pointer lookups performed by the runtime uint64
runtime-mallocs Mallocs is the cumulative count of heap objects allocated uint64
runtime-num-gc NumGC is the number of completed GC cycles uint32
runtime-num-goroutine NumGoroutine returns the number of goroutines that currently exist int
runtime-pause-total-ns PauseTotalNs is the cumulative nanoseconds in GC stop-the-world pauses since the program started uint64
runtime-sys Sys is the total bytes of memory obtained from the OS uint64
runtime-total-alloc TotalAlloc is cumulative bytes allocated for heap objects uint64

QueryExecutor

Tracks statistics about the query executor portion of the InfluxDB engine.

name description type
qe-queriesActive queriesActive tracks the number of queries being handled at this instant in time int
qe-queriesExecuted Number of queries that have been executed (started) int
qe-queriesFinished Number of queries that have finished int
qe-queryDurationNs queryDurationNs tracks the cumulative wall time, in nanoseconds, of every query executed int
qe-recoveredPanics Number of panics recovered by Query Executor int

Write

Tracks statistics about writes at a system level.

name description type
write-pointreq pointReq is incremented for every point that is attempted to be written, regardless of success int
write-pointreqlocal pointReqLocal is incremented for every point that is attempted to be written into a shard, regardless of success int
write-req req is incremented every time a batch of points is attempted to be written, regardless of success int
write-subwritedrop subWriteDrop is incremented every time a batch write to a subscriber is dropped due to contention or write saturation int
write-subwriteok subWriteOk is incremented every time a batch write to a subscriber succeeds int
write-writedrop writeDrop is incremented for every point dropped due to having a timestamp that does not match any existing retention policy int
write-writeerror writeError is incremented for every batch that was attempted to be written to a shard but failed int
write-writeok writeOk is incremented for every batch that was successfully written to a shard int
write-writetimeout writeTimeout is incremented every time a write failed due to timing out int

Subscriber

Tracks subscriber statistics.

name description type
subscriber-createfailures int
subscriber-pointswritten pointsWritten tracks the number of points successfully written to subscribers int
subscriber-writefailures writeFailures tracks the number of batches that failed to send to subscribers int

Continous Query

Tracks statistics about the Continuous Query executor.

name description type
cq-queryfail queryFail is incremented whenever a continuous query is executed but fails int
cq-queryok queryOk is incremented whenever a continuous query is executed without a failure int

HTTPD

Tracks statistics about the InfluxDB HTTP server.

name description type
httpd-authfail authFail indicates how many HTTP requests were aborted due to authentication being required but unsupplied or incorrect int
httpd-clienterror clientError is incremented every time InfluxDB sends an HTTP response with a 4XX status code int
httpd-pingreq pingReq is incremented every time InfluxDB serves the /ping HTTP endpoint int
httpd-pointswrittendropped Number of points dropped by the storage engine int
httpd-pointswrittenfail pointsWrittenFail is incremented for every point (not every batch) that was accepted by the /write HTTP endpoint but was unable to be persisted int
httpd-pointswrittenok pointsWrittenOK is incremented for every point (not every batch) that was accepted by the /write HTTP endpoint and persisted successfully int
httpd-queryreq queryReq is incremented every time InfluxDB serves the /query HTTP endpoint int
httpd-queryreqdurationns queryReqDurationNs tracks the cumulative wall time, in nanoseconds, of every query served int
httpd-queryrespbytes queryRespBytes is increased for every byte InfluxDB sends in a successful query response int
httpd-recoveredpanics Number of panics recovered by HTTP handler int
httpd-req req is incremented for every HTTP request InfluxDB receives int
httpd-reqactive reqActive is incremented when InfluxDB begins accepting an HTTP request and is decremented whenever InfluxDB finishes serving that request int
httpd-reqdurationns reqDurationNs tracks the cumulative wall time, in nanoseconds, of every request served int
httpd-servererror serverError is incremented every time InfluxDB sends an HTTP response with a 5XX status code int
httpd-statusreq statusReq is incremented every time InfluxDB serves the /status HTTP endpoint int
httpd-writereq writeReq is incremented every time InfluxDB serves the /write HTTP endpoint int
httpd-writereqactive writeReqActive tracks the number of write requests over HTTP being handled at this instant in time int
httpd-writereqbytes writeReqBytes tracks the total number of bytes of line protocol received by the /write endpoint int
httpd-writereqdurationns writeReqDurationNs tracks the cumulative wall time, in nanoseconds, of every write request served int

TLS Certificate

TLS Certificate collects information about a TLS Certificate.

Configuration

name description type required
host URL of the TLS host string required

Results

name description type
expires-in time before the TLS certificate expires, in nanoseconds int64
chain-expires-in time before any TLS certificate in the chain expires, in nanoseconds int64
hash the TLS certificate's hash string
signature-list list of the TLS certificat's signature algorithm in the full chain string

NTP

NTP probe returns metadata from an NTP time server.

Configuration

name description type required
address address of an NTP server string required

Results

name description type
clock-offset the estimated offset of the local system clock relative to the server's clock, in nanoseconds int64
rtt an estimate of the round-trip-time delay between the client and the server, in nanoseconds int64

Memcached

Memcached collects statistics from a memcached server.

Configuration

name description type required
address address of a memcached server string required

Results

name description type
uptime Number of seconds the Memcached server has been running since last restart. uint64
curr_connections Number of open connections to this Memcached server, should be the same value on all servers during normal operation. This is something like the count of mySQL's "SHOW PROCESSLIST" result rows. uint64
reserved_fds Number of misc fds used internally uint64
cmd_get Number of "get" commands received since server startup not counting if they were successful or not. uint64
cmd_set Number of "set" commands serviced since startup. uint64
cmd_flush The "flush_all" command clears the whole cache and shouldn't be used during normal operation. uint64
cmd_touch Cumulative number of touch reqs uint64
get_hits Number of successful "get" commands (cache hits) since startup, divide them by the "cmd_get" value to get the cache hitrate. uint64
get_misses Number of failed "get" requests because nothing was cached for this key or the cached value was too old. uint64
get_expired Number of items that have been requested but had already expired uint64
get_flushed Number of items that have been requested but have been flushed via flush_all uint64
delete_misses Number of "delete" commands for keys not existing within the cache. These 107k failed deletes are deletions of non existent race keys (see above). uint64
delete_hits Stored keys may be deleted using the "delete" command, this system doesn't delete cached data itself, but it's using the Memcached to avoid recaching-races and the race keys are deleted once the race is over and fresh content has been cached. uint64
bytes_read Total number of bytes received from the network by this server. uint64
bytes_written Total number of bytes send to the network by this server. uint64
bytes Number of bytes currently used for caching items, this server currently uses ~6 MB of it's maximum allowed (limit_maxbytes) 1 GB cache size. uint64
curr_items Number of items currently in this server's cache. The production system of this development environment holds more than 8 million items. uint64
evictions Number of objects removed from the cache to free up memory for new items because Memcached reached it's maximum memory setting (limit_maxbytes). uint64

PHP-FPM

PHP-FPM collects statistics from a PHP-FPM server.

Configuration

name description type required
address address of a PHP-FPM server string required
url URL of the status endpoint (default: /status) string optional

Results

name description type
listen_queue The number of request in the queue of pending connections. uint64
idle_processes The number of idle processes. uint64
active_processes The number of active processes uint64
slow_requests Enable php-fpm slow-log before you consider this. If this value is non-zero you may have slow php processes. uint64

MySQL

MySQL collects statistics from a MySQL server.

Configuration

name description type required
address MySQL server address (host:port) string required
login MySQL user account string required
password MySQL user password string required

Results

name description type
aborted-clients The number of connections that were aborted because the client died without closing the connection properly. uint64
aborted-connects The number of failed attempts to connect to the MySQL server. uint64
binlog-cache-use The number of transactions that used the binary log cache. uint64
binlog-stmt-cache-use The number of nontransactional statements that used the binary log statement cache. uint64
bytes-received The number of bytes received from all clients. uint64
bytes-sent The number of bytes sent to all clients. uint64
com-begin The number of times begin statement has been executed. uint64
com-change-db The number of times change-db statement has been executed. uint64
com-change-master The number of times change-master statement has been executed. uint64
com-commit The number of times commit statement has been executed. uint64
com-create-db The number of times create-db statement has been executed. uint64
com-delete The number of times delete statement has been executed. uint64
com-delete-multi The number of times delete-multi statement has been executed. uint64
com-insert The number of times insert statement has been executed. uint64
com-rollback The number of times rollback statement has been executed. uint64
com-select The number of times select statement has been executed. uint64
com-stmt-execute The number of times stmt-execute statement has been executed. uint64
com-stmt-fetch The number of times stmt-fetch statement has been executed. uint64
com-truncate The number of times truncate statement has been executed. uint64
com-update The number of times update statement has been executed. uint64
connection-errors-accept The number of errors that occurred during calls to accept() on the listening port. uint64
connection-errors-internal The number of connections refused due to internal errors in the server, such as failure to start a new thread or an out-of-memory condition. uint64
connection-errors-max-connections The number of connections refused because the server max-connections limit was reached. uint64
connection-errors-peer-address The number of errors that occurred while searching for connecting client IP addresses. uint64
connection-errors-select The number of errors that occurred during calls to select() or poll() on the listening port. uint64
connection-errors-tcpwrap The number of connections refused by the libwrap library. uint64
connections The number of connection attempts (successful or not) to the MySQL server. uint64
created-tmp-disk-tables The number of internal on-disk temporary tables created by the server while executing statements. uint64
created-tmp-tables The number of internal temporary tables created by the server while executing statements. uint64
flush-commands The number of times the server flushes tables, whether because a user executed a FLUSH TABLES statement or due to internal server operation. uint64
handler-read-first The number of times the first entry in an index was read. If this value is high, it suggests that the server is doing a lot of full index scans. uint64
handler-read-key The number of requests to read a row based on a key. If this value is high, it is a good indication that your tables are properly indexed for your queries. uint64
handler-read-last The number of requests to read the last key in an index. uint64
handler-read-next The number of requests to read the next row in key order. uint64
handler-read-prev The number of requests to read the previous row in key order. uint64
handler-read-rnd The number of requests to read a row based on a fixed position. This value is high if you are doing a lot of queries that require sorting of the result. uint64
handler-read-rnd-next The number of requests to read the next row in the data file. This value is high if you are doing a lot of table scans. uint64
innodb-buffer-pool-pages-data The number of pages in the InnoDB buffer pool containing data. uint64
innodb-buffer-pool-pages-dirty The current number of dirty pages in the InnoDB buffer pool. uint64
innodb-buffer-pool-pages-flushed The number of requests to flush pages from the InnoDB buffer pool. uint64
innodb-buffer-pool-pages-free The number of free pages in the InnoDB buffer pool. uint64
innodb-buffer-pool-pages-misc The number of pages in the InnoDB buffer pool that are busy because they have been allocated for administrative overhead, such as row locks or the adaptive hash index. uint64
innodb-data-fsyncs The number of fsync() operations so far. uint64
innodb-data-reads The total number of data reads (OS file reads). uint64
innodb-data-writes The total number of data writes. uint64
innodb-log-waits The number of times that the log buffer was too small and a wait was required for it to be flushed before continuing. uint64
innodb-log-writes The number of physical writes to the InnoDB redo log file. uint64
innodb-page-size InnoDB page size (default 16KB). uint64
innodb-pages-read The number of pages read from the InnoDB buffer pool by operations on InnoDB tables. uint64
innodb-pages-written The number of pages written by operations on InnoDB tables. uint64
innodb-row-lock-time-max The maximum time to acquire a row lock for InnoDB tables, in milliseconds. uint64
innodb-row-lock-waits The number of times operations on InnoDB tables had to wait for a row lock. uint64
key-blocks-unused The number of unused blocks in the MyISAM key cache. uint64
key-blocks-used The number of used blocks in the MyISAM key cache. uint64
key-reads The number of physical reads of a key block from disk into the MyISAM key cache. uint64
key-writes The number of physical writes of a key block from the MyISAM key cache to disk. uint64
locked-connects The number of attempts to connect to locked user accounts. uint64
open-files The number of files that are open. This count includes regular files opened by the server. uint64
open-streams The number of streams that are open (used mainly for logging). uint64
open-tables The number of tables that are open. uint64
prepared-stmt-count The current number of prepared statements. uint64
queries The number of statements executed by the server. uint64
select-full-join The number of joins that perform table scans because they do not use indexes. uint64
select-full-range-join The number of joins that used a range search on a reference table. uint64
slow-queries The number of queries that have taken more than long-query-time seconds. uint64
uptime The number of seconds that the server has been up. uint64

Elasticsearch

Elasticsearch collects statistics from an Elasticsearch store.

Configuration

name description type required
address address of an Elasticsearch server string required
timeout duration before the HTTP request times out time.Duration optional

Results

name description type
cluster-name ES cluster name string
status Health level of the cluster string
timed-out ? boolean
number-of-nodes Number of nodes in the cluster float64
number-of-data-nodes Number of data nodes in the cluster float64
active-primary-shards Number of primary shards in the cluster float64
active-shards Number of active shards in the cluster float64
relocating-shards Number of shards being relocated in the cluster float64
initializing-shards Number of shards being initialized in the cluster float64
unassigned-shards Number of shards currently unassigned in the cluster float64
delayed-unassigned-shards Number of unassigned shards which allocation is delayed in the cluster float64
number-of-pending-tasks Number of pending task in the cluster float64
number-of-in-flight-fetch Number of in-flight fetch operations float64
task-max-waiting-in-queue-millis Maximum number of milliseconds a task is waiting in queue float64
indices-count Count of indices in the cluster float64
docs-count Count of documents in the cluster float64
docs-deleted Count of deleted documents in the cluster float64
store-size Size of the cluster storage float64
querycache-memory Memory allocated to the cluster query cache float64
querycache-count-hit Number of hits on the cluster query cache float64
querycache-count-miss Number of miss on the cluster query cache float64
querycache-count-cache Number of cache operations on the cluster query cache float64
querycache-evictions Number of evictions from the cluster query cache float64
jvm-heap-max JVM heap max size on the cluster float64
jvm-heap-used JVM heap used size on the cluster float64
jvm-threads Number of JVM threads on the cluster float64

Nginx

Nginx collects values from Nginx stub status module.

Configuration

name description type required
url full URL of the Nginx server status string required
timeout duration before the HTTP request times out time.Duration optional

Results

name description type
active-connections The number of active client connections including waiting connections. int
accept-connections The total number of accepted connections. int
handled-connections The total number of handled connections. int
requests The total number of client requests. int
reading The current number of connections where nginx is reading the request header. int
writing The current number of connections where nginx is writing the response back to the client. int
waiting The current number of idle client connections waiting for a request. int

MongoDB

mongodb collects metrics from serverStatus command.

Configuration

name description type required
address address of the target mongodb server to gather metrics from string required
databases the comma separated list of databases to gather metrics from string optional
username a username to authenticate to the MongoDB server string optional
password a password to authenticate to the MongoDB server string optional

Results

name description type
uptime The number of seconds that the current MongoDB process has been active. int64
connections_current The number of incoming connections from clients to the database server int32
connections_available The number of unused incoming connections available int32
gl_clients_readers The number of the active client connections performing read operations int32
gl_clients_writers The number of the active client connections performing write operations int32
network_in The number of bytes that reflects the amount of network traffic received by this database int64
network_out The number of bytes that reflects the amount of network traffic sent from this database int64
ops_insert The total number of insert operations received since the mongod instance last started int32
ops_query The total number of query operations received since the mongod instance last started int32
ops_update The total number of update operations received since the mongod instance last started int32
ops_delete The total number of delete operations received since the mongod instance last started int32
ops_getmore The total number of getmore operations received since the mongod instance last started int32
ops_command The total number of command operations received since the mongod instance last started int32
mem_resident The value of mem.resident is roughly equivalent to the amount of RAM, in megabytes (MB), currently used by the database process int32
mem_virtual mem.virtual displays the quantity, in megabytes (MB), of virtual memory used by the mongod process int32

PostgreSQL

postgresql collects metrics from the statistics collector command of a PostgreSQL server.

Configuration

name description type required
address address of the target mongodb server to gather metrics from string required
username a username to authenticate to the MongoDB server string optional
password a password to authenticate to the MongoDB server string optional
sslmode SSL Mode of the PostgreSQL server (see https://www.postgresql.org/docs/10/static/libpq-ssl.html) string optional

Results

name description type
current_connections Number of backends currently connected to this database uint
max_connections The maximum number of client connections allowed. uint
shared_buffer_hits Number of times disk blocks were found already in the buffer cache, so that a read was not necessary uint
shared_buffer_reads Number of disk blocks read uint
temp_files_count Number of temporary files created by queries uint
temp_file_bytes Total amount of data written to temporary files by queries uint
rows_returned Number of rows returned by queries uint
rows_fetched Number of rows fetched by queries uint
rows_inserted Number of rows inserted by queries uint
rows_updated Number of rows updated by queries uint
rows_deleted Number of rows deleted by queries uint
deadlocks Number of deadlocks detected uint
index_size Total size of index on disk uint
table_size Total size of table on disk uint
toast_size Total size of toast on disk uint
n_dead_tup Estimated number of dead rows uint
n_live_tup Estimated number of live rows uint
checkpoints_requested Number of requested checkpoints that have been performed uint
checkpoints_scheduled Number of scheduled checkpoints that have been performed uint
buffers_backend Number of buffers written directly by a backend uint
buffers_background Number of buffers written by the background writer uint
buffers_checkpoint Number of buffers written during checkpoints uint