Erlang -- os_mon

OS_Mon

Reference Manual

Version 2.5.1

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### Table of Contents

- os_mon (App)
- cpu_sup
  - Top of manual page
  - avg1/0
  - avg15/0
  - avg5/0
  - nprocs/0
  - util/0
  - util/1
- disksup
  - Top of manual page
  - get_almost_full_threshold/0
  - get_check_interval/0
  - get_disk_data/0
  - set_almost_full_threshold/1
  - set_check_interval/1
- memsup
  - Top of manual page
  - get_check_interval/0
  - get_helper_timeout/0
  - get_memory_data/0
  - get_os_wordsize/0
  - get_procmem_high_watermark/0
  - get_sysmem_high_watermark/0
  - get_system_memory_data/0
  - set_check_interval/1
  - set_helper_timeout/1
  - set_procmem_high_watermark/1
  - set_sysmem_high_watermark/1
- os_sup
  - Top of manual page
  - disable/0
  - disable/2
  - enable/0
  - enable/2
- nteventlog
  - Top of manual page
  - start/2
  - start_link/2
  - stop/0

# os_mon

### Application

os_mon

### Application Summary

OS Monitoring Application

### Description

The operating system monitor, OS_Mon, provides the following services:

- cpu_sup CPU load and utilization supervision (Unix)
- disksup Disk supervision(Unix, Windows)
- memsup Memory supervision (Unix, Windows, VxWorks)
- os_sup Interface to OS system messages (Solaris, Windows)

To simplify usage of OS_Mon on distributed Erlang systems, it is not considered an error trying to use a service at a node where it is not available (either because OS_Mon is not running, or because the service is not available for that OS, or because the service is not started). Instead, a warning message is issued via error_logger and a dummy value is returned, which one is specified in the man pages for the respective services.

### Configuration

When OS_Mon is started, by default all services available for the OS, except os_sup, are automatically started. This configuration can be changed using the following application configuration parameters:

start_cpu_sup = bool()

  Specifies if cpu_sup should be started. Defaults to true.

start_disksup = bool()

  Specifies if disksup should be started. Defaults to true.

start_memsup = bool()

  Specifies if memsup should be started. Defaults to true.

start_os_sup = bool()

  Specifies if os_sup should be started. Defaults to false.

Configuration parameters effecting the different OS_Mon services are described in the respective man pages.

See config(4) for information about how to change the value of configuration parameters.

### See Also

cpu_sup(3), disksup(3), memsup(3), os_sup(3), nteventlog(3), snmp(3).