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syslog-ng Store Box 6.9.0 - Administration Guide

Preface Introduction The concepts of SSB The Welcome Wizard and the first login Basic settings User management and access control Managing SSB Configuring message sources Storing messages on SSB Forwarding messages from SSB Log paths: routing and processing messages Configuring syslog-ng options Searching log messages Searching the internal messages of SSB Classifying messages with pattern databases The SSB RPC API Monitoring SSB Troubleshooting SSB Security checklist for configuring SSB Glossary

Monitoring CPU load

SNMP object: HOST-RESOURCES-MIB::hrProcessorLoad

Community (v2c) /

Context (v3)

Data and system

CPU load shows the availability of a CPU. Its value is a rational number ranging from 0.0 or 0% to 1.0 or 100%. If the CPU load is 0.0 or 0%, then the measured CPU is idle. If the value is 1.0 or 100%, then the CPU is fully loaded.

If the load of one CPU is above 90% and other threads are significantly less loaded for a longer time period, fine-tune your configuration or purchase more syslog-ng Store Box(SSB) appliances. For assistance, contact our Support Team.

Monitoring CPU load averages

SNMP object: UCD-SNMP-MIB::laLoad

Community (v2c) /

Context (v3)

Data and system

CPU load averages (or system load averages) is the average load of syslog-ng Store Box(SSB)'s CPUs and the size of the task queue, during the past 1, 5, and 15 minutes, respectively.

If the load is constantly equal to or higher than the number of CPUs in your appliance, fine-tune your configuration or purchase more SSB appliances. For assistance, contact our Support Team.

If you query UCD-SNMP-MIB::laTable, the table of returned values will contain the returned values you would get when querying UCD-SNMP-MIB::laLoad, but in a more structured, easy-to-read format.

For which systems and configurations is it applicable? Applicable for all configurations and systems.
Value change frequency Its value is continuously changing.
Related issues and issue indicators Load too high (see Monitoring SSB's CPU).

Solution:

  • Decrease load.
  • Purchase a new SSB appliance.

Monitoring CPU usage

User CPU time:
SNMP object: UCD-SNMP-MIB::ssCpuUser

Community (v2c) /

Context (v3)

Data and system

If processor is not in idle (for example, there is live log traffic or report generation), it is quite normal that the majority of the CPU time is spent on running user space processes.

For which systems and configurations is it applicable? Applicable for all configurations and systems.
Value change frequency Its value is continuously changing.
Related issues and issue indicators If the returned value is too high, it indicates a highly loaded CPU on user space.

Solution:

  • Decrease load.

  • Purchase a new syslog-ng Store Box(SSB) appliance

  • Reconsider your configuration settings.
System CPU time:
SNMP object: UCD-SNMP-MIB::ssCpuSystem

Community (v2c) /

Context (v3)

Data and system

The amount of time spent in the kernel should be as low as possible. Ideally, around 0.5% of the time given to the different processes is spent in the kernel. This number can peak much higher, especially when there are a lot of I/O activities.

For which systems and configurations is it applicable? Applicable for all configurations and systems.
Value change frequency Its value is continuously changing.
Related issues and issue indicators If the returned value is too high, it indicates high kernel-intensive operations running on the CPU.

Solution:

  • Decrease load.

  • Purchase a new SSB appliance

  • Reconsider your configuration settings.
Idle CPU time:
SNMP object: UCD-SNMP-MIB::ssCpuIdle

Community (v2c) /

Context (v3)

Data and system

The total of the user CPU time percentage and the idle CPU percentage should be close to 100%. If the CPU spends a lot more time in other states, it is worth investigating the root cause, because it can indicate issues.

For which systems and configurations is it applicable? Applicable for all configurations and systems.
Value change frequency Its value is continuously changing.
Monitoring the details of your CPU usage:

To fine-tune monitoring your CPU usage, you can use the following values. It is also possible to generate a chart from these values.

Raw CPU user time UCD-SNMP-MIB::ssCpuRawUser
Raw CPU nice time UCD-SNMP-MIB::ssCpuRawNice
Raw CPU system time UCD-SNMP-MIB::ssCpuRawSystem
Raw CPU idle time UCD-SNMP-MIB::ssCpuRawIdle
Raw CPU wait time UCD-SNMP-MIB::ssCpuRawWait
Raw CPU kernel time UCD-SNMP-MIB::ssCpuRawKernel
Raw CPU interrupt time UCD-SNMP-MIB::ssCpuRawInterrupt
Raw CPU Soft IRQ time UCD-SNMP-MIB::ssCpuRawSoftIRQ
Raw CPU steal time UCD-SNMP-MIB::ssCpuRawSteal
Raw CPU guest time UCD-SNMP-MIB::ssCpuRawGuest
Raw CPU guest nice time UCD-SNMP-MIB::ssCpuRawGuestNice

Community (v2c) /

Context (v3)

Data and system for all of the above

Monitoring SSB's I/O

Disk I/O per partition
SNMP object: UCD-DISKIO-MIB::diskIOTable

Community (v2c) /

Context (v3)

Data and system

  • sda

    If the 15-minute load (for details, see Monitoring CPU load averages) is getting close to 90%, your system does not have enough resources and you probably need to purchase more syslog-ng Store Box(SSB) appliances. For assistance, contact our Support Team.

  • sdb

    NOTE: This is only available on SSB T1 appliances.

    If the 15-minute load (for details, see Monitoring CPU load averages) is getting close to 90%, your system does not have enough resources and you probably need to purchase more SSB appliances. For assistance, contact our Support Team.

For which systems and configurations is it applicable? Applicable for all configurations and systems.
Value change frequency Its value changes quite often, depending on the I/O load and its type.
Related issues and issue indicators When I/O load is too high, the system slows down.

Solution:

  • Reconsider your configuration settings.

  • Purchase a new SSB appliance.

  • For technical assistance, contact our Support Team.
Interfaces I/O by interface name
SNMP object: RFC1213-MIB::ifTable

Community (v2c) /

Context (v3)

Data and system

The following interfaces can be monitored (the type of traffic that can affect the load):

  • eth0 - external (network, redundant HA, next hop monitoring)

  • eth1 - management (network, redundant HA, next hop monitoring)

  • eth2 - internal (redundant, next hop monitoring)

  • eth3 - HA

If the load on an interface seems to be too high, check whether you have configured SSB in a way that affects that node. For example, if you do not use a management interface, the load on the external interface can be higher. Or, configuring next hop monitoring can also increase the load on an interface.

RFC1213-MIB:ifTable
For which systems and configurations is it applicable? Applicable for all configurations and systems.
Value change frequency Its value is continuously changing, depending on incoming logs and DRBD sync.
Related issues and issue indicators I/O load may become too high on network interfaces, which may result in log loss, slow sync, and HA in degraded mode.

Solution:

  • Reconsider your configuration settings.

  • Purchase a new SSB appliance.

  • For technical assistance, contact our Support Team.
RFC1213-MIB:ifTable - ETH 0, ETH3
For which systems and configurations is it applicable? Applicable for all configurations and systems.
Value change frequency Its value is continuously changing, depending on the number of incoming logs.
Related issues and issue indicators If the I/O load is too high, the network will not handle it, which may result in log loss.

 Caution:

Hazard of data loss If the I/O load becomes too high for the network to handle, it may cause log loss. To avoid log loss, reconsider your configuration settings, Alternatively, reconsider your configuration settings, upgrading the capacity of your SSB appliance, purchasing more SSB appliances, or contact our Support Team.

Solution:

RFC1213-MIB:ifTable - ETH3
For which systems and configurations is it applicable? Only applicable for HA clusters.
Value change frequency Its value is continuously changing, depending on the number of incoming logs.
Related issues and issue indicators Network traffic load too high for the NIC to handle.
(It rarely ever happens.)

Solution:

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