--- title: Cluster Manager Metrics description: A list of the metrics provided by the Cluster Manager. pubDate: 2026-08-17T09:53:44.266Z antora: editUrl: https://github.com/couchbase/docs-server/edit/release/7.6/modules/metrics-reference/pages/ns-server-metrics.adoc xref: xref:7.6@server:metrics-reference:ns-server-metrics.adoc[] --- [Consult the llms.txt file for a full list of contents](/llms.txt) [View original HTML](/server/7.6/metrics-reference/ns-server-metrics.html) # Cluster Manager Metrics > A list of the metrics provided by the Cluster Manager. The following Cluster Manager metrics can be queried by means of the REST APIs described in [Statistics](../rest-api/rest-statistics.md). Histograms Note that each histogram metric will generate three time series, with the following suffixes: * `_count` * `_sum` * `_bucket` Please refer to [Prometheus Histograms and Summaries](https://prometheus.io/docs/practices/histograms/) for more information. > [!TIP] > * The x.y.z badge shows the Couchbase Server version the metric was added in. > * The type / unit badge shows shows the Prometheus [type](https://prometheus.io/docs/tutorials/understanding%5Fmetric%5Ftypes/) and [unit](https://prometheus.io/docs/practices/naming/#base-units) (if present). | audit\_queue\_length7.0.0gauge Current number of entries in the audit queue | | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | audit\_unsuccessful\_retries7.0.0counter Failed attempts to audit | | cm\_auth\_cache\_current\_items7.6.0gauge Current number of items available in cbauth auth cache | | cm\_auth\_cache\_hit\_total7.6.0counter Total number of cbauth auth cache hits | | cm\_auth\_cache\_max\_items7.6.0gauge Maximum capacity of cbauth auth cache | | cm\_auth\_cache\_miss\_total7.6.0counter Total number of cbauth auth cache misses | | cm\_auto\_failover\_count7.2.6gauge Number of auto-failovers | | cm\_auto\_failover\_enabled7.2.6gauge Indicates if auto-failover is enabled (1 = true, 0 = false) | | cm\_auto\_failover\_max\_count7.2.6gauge Maximum number of auto-failovers before being disabled | | cm\_build\_streaming\_info\_total7.0.0counter Number of streaming requests processed | | cm\_client\_cert\_cache\_current\_items7.6.0gauge Current number of items available in cbauth client\_cert cache | | cm\_client\_cert\_cache\_hit\_total7.6.0counter Total number of cbauth client\_cert cache hits | | cm\_client\_cert\_cache\_max\_items7.6.0gauge Maximum capacity of cbauth client\_cert cache | | cm\_client\_cert\_cache\_miss\_total7.6.0counter Total number of cbauth client\_cert cache misses | | cm\_erlang\_port\_count7.6.0gauge The number of ports in use by the erlang VM | | cm\_erlang\_port\_limit7.6.0gauge The maximum number of ports that the erlang VM can use | | cm\_erlang\_process\_count7.6.0gauge The number of processes in use by the erlang VM | | cm\_erlang\_process\_limit7.6.0gauge The maximum number of processes that the erlang VM can use | | cm\_failover\_total7.2.6counter Number of non-graceful failover results | | cm\_gc\_duration\_seconds7.6.0histogram Time to perform erlang garbage collection | | cm\_graceful\_failover\_total7.2.6counter Number of graceful failover results | | cm\_http\_requests\_seconds7.0.0histogram Number of bucket HTTP requests | | cm\_http\_requests\_total7.0.0counter Total number of HTTP requests categorized | | cm\_is\_balanced7.2.6gauge Indicates if cluster is balanced (1 = true, 0 = false). Only reported by the orchestrator node and only updated once every 30 seconds | | cm\_logs\_total7.1.0counter Total number of logs logged | | cm\_memcached\_call\_time\_seconds7.0.0histogram Amount of time to call memcached | | cm\_memcached\_cmd\_total7.6.0gauge Total number of memcached commands | | cm\_memcached\_e2e\_call\_time\_seconds7.0.0histogram End to end memcached call times | | cm\_memcached\_q\_call\_time\_seconds7.0.0histogram / seconds Memcached queue call times | | cm\_mru\_cache\_add\_time\_seconds7.0.0histogram / seconds Time to add to MRU cache | | cm\_mru\_cache\_flush\_time\_seconds7.0.0histogram / seconds Time to flush MRU cache | | cm\_mru\_cache\_lock\_time\_seconds7.0.0histogram / seconds Time to lock MRU cache | | cm\_mru\_cache\_lookup\_time\_seconds7.0.0histogram / seconds Time to perform a lookup in the MRU cache | | cm\_mru\_cache\_lookup\_total7.0.0counter Total number of MRU cache lookups | | cm\_mru\_cache\_take\_lock\_total7.0.0counter Total number of times MRU cache lock was obtained | | cm\_node\_unreachable\_total7.6.11counter Total number of times the node identified by the node label was reported as unreachable. Depending on the reason, the notification may be immediate (for example, connection closed) or delayed (for example, tick timeout). This can help identify intermittent network connectivity issues that may not trigger auto-failover. | | cm\_odp\_report\_failed7.0.0counter Number of failures to send on-demand pricing report | | cm\_outgoing\_http\_requests\_seconds7.0.0histogram / seconds Time taken for outgoing HTTP requests | | cm\_outgoing\_http\_requests\_total7.0.0counter Total number of outgoing HTTP requests | | cm\_rebalance\_in\_progress7.2.6gauge Indicates if a rebalance is running (1 = true, 0 = false). Only reported by the orchestrator node. | | cm\_rebalance\_progress7.2.6gauge / ratio Estimate of the rebalance progress (0 - 1) for each stage. Only reported by the orchestrator node. | | cm\_rebalance\_total7.2.6counter Number of rebalance results | | cm\_request\_hibernates\_total7.0.0counter Number of times requests were hibernated | | cm\_request\_unhibernates\_total7.0.0counter Number of times requests were unhibernated | | cm\_rest\_request\_access\_forbidden\_total7.6.0counter Number of REST requests failing due inadequate permissions | | cm\_rest\_request\_auth\_failure\_total7.6.0counter Number of REST requests failing authentication | | cm\_rest\_request\_enters\_total7.0.0counter Number of REST requests to enter ns\_server | | cm\_rest\_request\_failure\_total7.6.0counter Number of REST requests failing (see specific code) | | cm\_rest\_request\_leaves\_total7.0.0counter Number of REST requests to exit ns\_server | | cm\_status\_latency\_seconds7.0.0histogram / seconds Latency time for status | | cm\_up\_cache\_current\_items7.6.0gauge Current number of items available in cbauth up cache | | cm\_up\_cache\_hit\_total7.6.0counter Total number of cbauth up cache hits | | cm\_up\_cache\_max\_items7.6.0gauge Maximum capacity of cbauth up cache | | cm\_up\_cache\_miss\_total7.6.0counter Total number of cbauth up cache misses | | cm\_user\_bkts\_cache\_current\_items7.6.0gauge Current number of items available in cbauth bkts cache | | cm\_user\_bkts\_cache\_hit\_total7.6.0counter Total number of cbauth bkts cache hits | | cm\_user\_bkts\_cache\_max\_items7.6.0gauge Maximum capacity of cbauth bkts cache | | cm\_user\_bkts\_cache\_miss\_total7.6.0counter Total number of cbauth bkts cache misses | | cm\_uuid\_cache\_current\_items7.6.0gauge Current number of items available in cbauth uuid cache | | cm\_uuid\_cache\_hit\_total7.6.0counter Total number of cbauth uuid cache hits | | cm\_uuid\_cache\_max\_items7.6.0gauge Maximum capacity of cbauth uuid cache | | cm\_uuid\_cache\_miss\_total7.6.0counter Total number of cbauth uuid cache misses | | cm\_web\_cache\_hits\_total7.0.0counter Total number of web cache hits | | cm\_web\_cache\_inner\_hits\_total7.0.0counter Total number of inner web cache hits | | cm\_web\_cache\_updates\_total7.0.0counter Total number of web cache updates | | couch\_docs\_actual\_disk\_size7.0.0gauge / bytes Amount of disk space used by the Data Service | | couch\_views\_actual\_disk\_size7.0.0gauge / bytes Amount of disk space used by Views data | | sys\_allocstall7.0.0counter Number of alloc stalls | | sys\_cpu\_burst\_rate7.2.0Deprecated in 7.6.0gauge Rate at which CPUs overran their quota | | sys\_cpu\_cgroup\_seconds\_total7.2.4counter / seconds Number of CPU seconds utilized in the cgroup, by mode | | sys\_cpu\_cgroup\_usage\_seconds\_total7.6.0counter / seconds Number of 'user' and 'system' CPU seconds utilized in the cgroup | | sys\_cpu\_cores\_available7.0.0gauge Number of available CPU cores in the control group | | sys\_cpu\_host\_cores\_available7.1.1gauge Number of available CPU cores in the host | | sys\_cpu\_host\_idle\_rate7.2.4Deprecated in 7.6.0gauge Idle CPU utilization rate in the host | | sys\_cpu\_host\_other\_rate7.2.4Deprecated in 7.6.0gauge Other (not idle/user/sys/irq/stolen) CPU utilization rate in the host | | sys\_cpu\_host\_seconds\_total7.2.1counter / seconds Number of CPU seconds utilized in the host, by mode | | sys\_cpu\_host\_sys\_rate7.1.1Deprecated in 7.6.0gauge System CPU utilization rate in the host | | sys\_cpu\_host\_user\_rate7.1.1Deprecated in 7.6.0gauge User space CPU utilization rate in the host | | sys\_cpu\_host\_utilization\_rate7.1.1Deprecated in 7.6.0gauge CPU utilization rate in the host | | sys\_cpu\_irq\_rate7.0.0Deprecated in 7.6.0gauge IRQ rate | | sys\_cpu\_stolen\_rate7.0.0Deprecated in 7.6.0gauge CPU stolen rate | | sys\_cpu\_sys\_rate7.0.0Deprecated in 7.6.0gauge System CPU utilization rate in the control group | | sys\_cpu\_throttled\_rate7.2.0Deprecated in 7.6.0gauge Rate at which CPUs were throttled | | sys\_cpu\_user\_rate7.0.0Deprecated in 7.6.0gauge User space CPU utilization rate in the control group | | sys\_cpu\_utilization\_rate7.0.0Deprecated in 7.6.0gauge CPU utilization rate in the control group | | sys\_disk\_queue7.2.4gauge Current disk queue length of the disk | | sys\_disk\_queue\_depth7.2.4gauge Maximum disk queue length of the disk | | sys\_disk\_read\_bytes7.2.4counter Number of bytes read by the disk | | sys\_disk\_read\_time\_seconds7.2.4counter Amount of time that the disk spent reading | | sys\_disk\_reads7.2.4counter Number of reads that the disk performed | | sys\_disk\_time\_seconds7.2.4counter Amount of time that the disk spent performing IO | | sys\_disk\_write\_bytes7.2.4counter Number of bytes written by the disk | | sys\_disk\_write\_time\_seconds7.2.4counter Amount of time that the disk spent writing | | sys\_disk\_writes7.2.4counter Number of writes that the disk performed | | sys\_mem\_actual\_free7.0.0gauge / bytes Amount of system memory available, including buffers/cache | | sys\_mem\_actual\_used7.0.0gauge / bytes Amount of system memory used, excluding buffers/cache | | sys\_mem\_cgroup\_actual\_used7.2.0gauge / bytes Amount of system memory used, excluding buffers/cache, in the control group | | sys\_mem\_cgroup\_limit7.2.0gauge / bytes System memory limit, in the control group | | sys\_mem\_cgroup\_used7.2.0gauge / bytes Amount of system memory used, including buffers/cache, in the control group | | sys\_mem\_free7.0.0gauge / bytes Amount of system memory free, excluding buffers/cache | | sys\_mem\_limit7.0.0Deprecated in 7.6.0gauge / bytes System memory limit | | sys\_mem\_total7.0.0gauge / bytes Total amount of system memory | | sys\_mem\_used\_sys7.0.0gauge / bytes Amount of system memory used, including buffers/cache | | sys\_pressure\_share\_time\_stalled7.2.4gauge Percentage of time that tasks were stalled on a given resource | | sys\_pressure\_total\_stall\_time\_usec7.2.4counter / microseconds Absolute stall time when tasks were stalled on a given resource | | sys\_swap\_total7.0.0gauge / bytes Total amount of swap space | | sys\_swap\_used7.0.0gauge / bytes Amount of swap space used | | sysproc\_cpu\_seconds\_total7.2.4counter Amount of user CPU cycles used, by process | | sysproc\_cpu\_utilization7.0.0Deprecated in 7.6.0gauge CPU utilization rate, by process | | sysproc\_major\_faults\_raw7.0.0counter Number of major page faults, by process | | sysproc\_mem\_resident7.0.0gauge / bytes Amount of resident memory used, by process | | sysproc\_mem\_share7.0.0gauge / bytes Amount of shared memory used, by process | | sysproc\_mem\_size7.0.0gauge / bytes Amount of memory used, by process | | sysproc\_minor\_faults\_raw7.0.0gauge Number of minor page faults, by process | | sysproc\_page\_faults\_raw7.0.0gauge Number of page faults, by process | | sysproc\_start\_time7.2.4counter OS specific time when process was started |