Dell PowerConnect W-Airwave User Manual page 216

Table 122 System > Performance Page Fields and Graphs
Field
System Information
CPU(s)
Memory
Kernel
Device Polling
Performance Graphs
System Load Average
System Memory Usage
System Disk Utilization
System Disk IOPs
System Disk Throughput
System Disk Outstanding I/O
Requests
System Swap Usage
System CPU Utilization
I/O Throughput by Worker/by
Service
CPU Utilization by Worker/by
Service
System Network Bandwidth
Bandwidth by Protocol
Legacy SNMP Fetcher
Requests
Legacy SNMP Fetcher
Responses
High Performance SNMP
Fetcher Requests
High Performance SNMP
Fetcher Responses
216 | Performing Daily Administration in AirWave
Description
Basic CPU information as reported by the operating system.
The amount of physical RAM and Swap space seen by the operating system. Refer to the Dell
PowerConnect W-AirWave Server Sizing Guide for hardware requirements.
The version of the Linux kernel running on the box.
Displays some AP/Device polling statistics.
The number of jobs currently waiting to be processed. Load is a rough metric that will tell you
how busy a server is. A typical AMP load is around 2-3 times the number of CPU cores you have
in your system. A constant load of 4x to 5x is cause for concern. A load above 6x is a serious
issue and will probably result in AMP becoming unusable. To lower the load average, try
increasing a few polling periods in the Groups > Basic page.
The amount of RAM that is currently used broken down by usage. It is normal for AMP to have
very little free RAM. Linux automatically allocates all free RAM as cache and buffer. If the kernel
needs additional RAM for process it will dynamically take it from the cache and buffer.
The amount of data read from the disk and written to the disk.
The number of disk reads and writes per second.
The rate of reading and writing from and to the disk in bytes per second.
The average number of outstanding I/O requests (queue depth). If it's high, it means that I/O
requests (disk reads/writes) aren't being serviced as fast as they're being asked for.
The amount of Swap memory used by AMP. Swap is used when the there is no more free
physical RAM. A large performance penalty is paid when swap is used. If an AMP consistently
uses swap, you should consider installing additional RAM.
The percentage of CPU that has been used by the user and the system as well as the amount
that was idle.
Displays reads and writes for workers (AMP services, database, VisualRF, web server, RRD tool
and AWRRD tool) and for services (AMP, VisualRF and web server).
Displays reads and writes for workers (AMP services, database, VisualRF, web server, RRD tool
and AWRRD tool) and for services (AMP, VisualRF and web server).
All traffic in and out measured in bits per second of your primary network interface (Eth0 being
the most common).
Displays the amount of traffic used by Telnet, HTTPS and SNMP used by your primary network
interface (Eth0 being the most common).
The number of SNMP get and walk requests per second performed by the legacy (v1 and v3)
SNMP fetcher.
The number of SNMP OIDs received per second performed by the legacy (v1 and v3) SNMP
fetcher.
The number of SNMP get and walk requests per second performed by the high performance
SNMP (v2c) fetcher.
The number of SNMP OIDs received per second performed by the high performance SNMP
(v2c) fetcher.
Dell PowerConnect W-AirWave | Version 7.3