Status

The Server Status page has two tabs to summarize the current status of GeoServer. The Status tab provides a summary of server configuration parameters and run-time status. The modules tab provides the status of the various modules installed on the server. This page provides a useful diagnostic tool in a testing environment.

Server Status

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Status Page (default tab)

Status Field Descriptions

The following table describes the current status indicators.

Option

Description

Data directory

Shows the path to the GeoServer data directory (GEOSERVER_DATA_DIR property).

Locks

A WFS has the ability to lock features to prevent more than one person from updating the feature at one time. If data is locked, edits can be performed by a single WFS editor. When the edits are posted, the locks are released and features can be edited by other WFS editors. A zero in the locks field means all locks are released. If locks is non-zero then a client has reserved some content for editing.

Press Free locks to release all feature locks currently held by the server and update the field value to zero.

Connections

Refers to the numbers of stores GeoServer is connected to, in the above case 9, that are enabled and available.

Memory Usage

The amount of memory currently used by GeoServer. In the above example, 174 MB of memory used out of a total of 3.56 GB available to Java.

Press Free Memory to recycle unused memory by running the garbage collector.

JVM Version

Denotes which version of the JVM (Java Virtual Machine) is being used to power the server. Here the JVM is AdoptOpenJDK 1.8.0_282.

Java Rendering Engine

Shows the rendering engine used for vector operations.

Available Fonts

Shows the number of fonts available. Selecting the link will show the full list.

Native JAI

GeoServer uses Java Advanced Imaging (JAI) framework for image rendering and coverage manipulation. When installed (true) native operations are available for image processing in a Java 8 environment.

We recommend the use of JAI-EXT operations for greater stability.

Native JAI ImageIO

GeoServer uses JAI Image IO (JAI) framework for raster data loading and image encoding. When installed (true) native encoders are available for WCS and WMS output in a Java 8 environment.

We recommend use of libjpeg-turbo for those interested in increasing encoding performance.

JAI Maximum Memory

The amount of memory available for the image processing tile cache, in this case 1.78 GB.

JAI Memory Usage

Run-time amount of memory is used for the tile cache.

Press Free Memory to clear available JAI memory by flushing the tile cache.

JAI Memory Threshold

Refers to the percentage, e.g. 75, of cache memory to retain during tile removal.

Number of JAI Tile Threads

The number of parallel threads used by the scheduler to handle tiles.

JAI Tile Thread Priority

Schedules the global tile scheduler priority. The priority value defaults to 5, and must fall between 1 and 10.

Thread Pool Core Pool Size

Number of threads that the ThreadPoolExecutor will create. This is underlying Java runtime functionality - see the Java documentation for ThreadPoolExecutor for more information.

Thread Pool Max Pool Size

Maximum number of threads that the ThreadPoolExecutor will create. This is underlying Java runtime functionality - see the Java documentation for ThreadPoolExecutor for more information.

Thread Pool Keep Alive Time

Timeout for threads to be terminated if they are idle and more than the core pool number exist. This is underlying Java runtime functionality - see the Java documentation for ThreadPoolExecutor for more information.

Update Sequence

Refers to the number of times, e.g. 157, the server configuration has been modified.

Resource cache

GeoServer maintains a resource cache with connections to stores, feature type definitions, external graphics, font definitions, and CRS definitions. This includes custom CRS definitions defined in data directory user_projections/epsg.properties.

Press Clear to empty the resource cache. This will force GeoServer to reconnect to stores, reconnect to databases, re-read icon and font information, and reload custom CRS definitions.

Configuration and catalog

GeoServer keeps its configuration data in memory.

Press Reload to force GeoServer to reload all of its configuration from disk. This is useful if for any reason that configuration information has become stale (e.g., an external utility has modified the configuration on disk).

Module Status

The Modules tab provides a summary of the status of all installed modules in the running server.

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Module Status

Field Descriptions

Module Name

Human readable name of the module, this links to a popup containing the full details and messages of the module

Module ID

The internal package name of the module

Available

Whether the module is available to GeoServer.

A database extension requiring a third-party database driver to be installed would not be available for use.

Enabled

Whether the module is enabled in the current GeoServer configuration

Component

Functional component provided by the module.

Version

The version of the installed module

Message (popup)

Status message such as what Java rendering engine is in use, or the library path if the module/driver is unavailable
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Module Status popup

System Status

The System Status tab provides extra information about the system environment GeoServer is running in. This provides an overview of the status of the GeoServer instance.

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System status

This information is also available via the REST API to troubleshoot remote systems. The library OSHI is used to retrieve system-level information without depending on native libraries or DLLs, relying solely on Apache JNA. Major operating systems (Linux, Windows and MacOS) are supported out of the box.

Use the checkbox Enable All Statistics to start and stop the collecting and displaying system status information. Disabling is useful if GeoServer is generating a high CPU load due to system status collection.

The available system information is:

Info

Example

Description

Operating system

Linux Mint 18

Name of the operating system and the used version

Uptime

08:34:50

Up time of the system

System average load 1 minute

0.90

System average load for the last minute

System average load 5 minutes

1.12

System average load for the last five minute

System average load 15 minute

0.68

System average load for the last fifteen minute

Number of physical CPUs

4

Number of physical CPUs / cores available

Number of logical CPUs

8

Number of logical CPUs / cores available

Number of running process

316

Total number of process running in the system

Number of running threads

1094

Total number of threads running in the system

CPU load average

4.12 %

Average load of the CPU in the last second

CPU * load

11.43 %

Load of a specific core in the last second

Used physical memory

31.58 %

Percentage of the system memory used

Total physical memory

31.4 GiB

System total memory

Free physical memory

21.4 GiB

System memory available for use

Used swap memory

0.00%

Percentage of swap memory used

Total swap memory

32.0 GiB

System total swap memory

Free swap memory

32.0 GiB

Free swap memory

File system usage

65.47 %

File system usage taking in account all partitions

Partition * used space

54.8 %

Percentage of space used in a specific partition

Partition * total space

338.9 GiB

Total space of a specific partition

Partition * free space

117.0 GiB

Free space on a specific partition

Network interfaces send

42.0 MiB

Data send through all the available network interfaces

Network interfaces received

700.4 MiB

Data received through all the available network interfaces

Network interface * send

25.0 MiB

Data send through a specific network interface

Network interface * received

250.4 MiB

Data received through a specific network interface

CPU temperature

52.00 ºC

CPU temperature

CPU voltage

1.5 V

CPU voltage

GeoServer CPU usage

3.5 %

Percentage of CPU used by GeoServer in the last second

GeoServer threads

49

Number of threads created by GeoServer

GeoServer JVM memory usage

5.83 %

Percentage of the JVM memory used by GeoServer

If some information is not available the special term NOT AVAILABLE will appear. Values will be automatically converted to best human readable unit.

JVM Console

For information on the live Java Runtime Environment the JVM Console tab provides access to two useful troubleshooting tools.

Press Thread Dump for a summary of all active threads. This is primarily used to troubleshoot performance issues and a non-responsive system. This can be used to identify when significant work is happening in the background, or if threads are stuck waiting on a resource.

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Thread Dump console output

Press Heap Dump for an overview of memory use. This can be used to troubleshoot systems that are encountering a memory leak over time.

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Heap Dump console output

  • Click Download link to download the JVM Console contents.

For more information on effective use see Troubleshooting.

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