System Info Handler

This API provides the same information displayed on the Dashboard.

Request

"System"-level information for individual nodes can be fetched with the API below:

V1 API
V2 API

http://localhost:8983/solr/admin/system

http://localhost:8983/api/node/system

Response

The keys in the result are:

mode: Either solrcloud or std, indicating the mode Solr is running in standalone mode.
solr_home: Solr base directory.
core_root: Solr core base directory.
zkHost: Zookeeper host, when running in cloud mode.
node: Node name, when running cloud mode.
lucene: An object containing Solr and Lucene version information
jvm: An object containing information on the JVM
system: Information on the system.
security: Information on security.
gpu: Information on GPUs.

Lucene and Solr Versions Information Object

The lucene key in the response is an object with these keys:

lucene-spec-version: The specification version of the Lucene package.
lucene-impl-version: The implementation version of the Lucene package.
solr-spec-version: The specification version of the Solr package.
solr-impl-version: The implementation version of the Solr package.

JVM Information Object

The jvm key in the response is an object with these keys and more:

version: JVM specification version.
name: Name of the JVM.
memory: An object containing memory usage information.

System Information Object

The system key in the response is a map of the underlying system information, containing these keys, and more:

name: Operating system name.
uname: The result of running uname -a. Not available on Windows.
uptime: The result of running uptime. Not available on Windows.

Security Information Object

The security key in the response is an object with these keys:

tls: Flag to indicate if TLS is enabled or not. If disabled, this is the only key in the response.
authenticationPlugin: The name of the configured authentication plugin.
authorizationPlugin: The name of the configured authorization plugin.
username: The name of the current user.
roles: The roles of the current user.
permissions: The permissions of the current user.

GPU Information Object

The gpu key in the response is an object with these keys:

available: Flag to indicate if GPU is available or not. If unavailable, this is the only key in the response.
count: Count of available GPUs.
memory: An object listing the 'free', 'total', and 'used' memory.
devices: A listing of the GPU devices.

Examples

Examples on this page refer to the V2 API.

Retrieve system information from a node in cloud mode.

curl http://localhost:8983/api/node/system

{
  "responseHeader": {
    "status": 0,
    "QTime": 4
  },
  "node": "localhost:8983_solr",
  "mode": "solrcloud",
  "zkHost": "127.0.0.1:9983",
  "solr_home": "/opt/solr/example/cloud/node1/solr",
  "core_root": "/opt/solr/example/cloud/node1/solr",
  "lucene": {
    "solr-spec-version": "11.0.0",
    "solr-impl-version": "11.0.0-SNAPSHOT f096b9a8aa2e10b8d2e87d7b8699953544d0f4f6 [snapshot build, details omitted]",
    "lucene-spec-version": "10.3.2",
    "lucene-impl-version": "10.3.2 dadfd90b4401947f4d0387669dc94999fbb2c830 - 2025-11-13 10:41:29"
  },
  "jvm": {
    "name": "Ubuntu OpenJDK 64-Bit Server VM",
    "version": "21.0.9 21.0.9+10-Ubuntu-124.04",
    "processors": 4,
    "jre": {
      "vendor": "Ubuntu",
      "version": "21.0.9"
    },
    "spec": {
      "name": "Java Platform API Specification",
      "vendor": "Oracle Corporation",
      "version": "21"
    },
    "vm": {
      "name": "OpenJDK 64-Bit Server VM",
      "vendor": "Ubuntu",
      "version": "21.0.9+10-Ubuntu-124.04"
    },
    "jmx": {
      "classpath": "start.jar",
      "startTime": 1771355675708,
      "upTimeMS": 1695023,
      "commandLineArgs": [
        "-Xms512m",
        "-Xmx512m",
        "-XX:+UseG1GC",
        "-XX:+PerfDisableSharedMem",
        "-XX:+ParallelRefProcEnabled",
        "-XX:MaxGCPauseMillis=250",
        "-XX:+UseLargePages",
        "-XX:+AlwaysPreTouch",
        "-XX:+ExplicitGCInvokesConcurrent",
        "-Xlog:gc*:file=/opt/solr/../logs/solr_gc.log:time,uptime:filecount=9,filesize=20M",
        "-Dsolr.jetty.inetaccess.includes=",
        "-Dsolr.jetty.inetaccess.excludes=",
        "-Dsolr.zookeeper.client.timeout=30000",
        "-Dsolr.zookeeper.server.enabled=true",
        "-Dsolr.logs.dir=/opt/solr/../logs",
        "-Dsolr.port.listen=8983",
        "-DSTOP.PORT=7983",
        "-DSTOP.KEY=solrrocks",
        "-Djava.io.tmpdir=/tmp",
        "-Dsolr.host.advertise=localhost",
        "-Duser.timezone=UTC",
        "-XX:-OmitStackTraceInFastThrow",
        "-XX:+CrashOnOutOfMemoryError",
        "-XX:ErrorFile=/opt/solr/../logs/jvm_crash_%p.log",
        "-Djetty.home=/opt/solr/server",
        "-Dsolr.solr.home=/opt/solr/example/cloud/node1/solr",
        "-Dsolr.install.dir=/opt/solr/",
        "-Dsolr.install.symDir=/opt/solr/",
        "-Dlog4j.configurationFile=/opt/solr/server/resources/log4j2.xml",
        "-Xss256k",
        "--add-modules=jdk.incubator.vector",
        "--enable-native-access=ALL-UNNAMED",
        "-Djava.security.manager",
        "-Djava.security.policy=/opt/solr/server/etc/security.policy",
        "-Djava.security.properties=/opt/solr/server/etc/security.properties",
        "-Dsolr.internal.network.permission=*",
        "-Dsolr.log.muteconsole"
      ]
      "memory": {
        "free": "229.5 MB",
        "total": "512 MB",
        "max": "512 MB",
        "used": "282.5 MB (%55.2)",
        "raw": {
          "free": 240673856,
          "total": 536870912,
          "used": 296197056,
          "max": 536870912,
          "used%": 55.171000957489014
        }
      }
    },
    "security": {
      "tls": false
    },
    "gpu": {
      "available": false,
      "count": 0
    },
    "system": {
      "freePhysicalMemorySize": "2985586688",
      "totalMemorySize": "8307912704",
      "availableProcessors": "4",
      "freeMemorySize": "2985586688",
      "openFileDescriptorCount": "196",
      "freeSwapSpaceSize": "2660519936",
      "maxFileDescriptorCount": "65536",
      "version": "6.14.0-33-generic",
      "totalSwapSpaceSize": "4294963200",
      "committedVirtualMemorySize": "4357632000",
      "cpuLoad": "0.06624527740181138",
      "systemLoadAverage": "0.3193359375",
      "processCpuLoad": "0.004622084725943523",
      "systemCpuLoad": "0.0",
      "processCpuTime": "43450000000",
      "name": "Linux",
      "totalPhysicalMemorySize": "8307912704",
      "arch": "amd64"
    }
  }
}