Users Guide

237 | Performing Daily Administration in W-AirWave Dell Networking W-AirWave 8.2.4 | User Guide
Field Description
Memory The amount of physical RAM and Swap space seen by the operating system. Refer
to the Dell Networking W-AirWave Server Sizing Guide at
dell.com/support/manuals for hardware requirements.
Kernel The version of the Linux kernel running on the box.
Device Polling Displays some AP/Device polling statistics.
Performance Graphs
System Load Average 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 W-AirWave 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 W-
AirWave becoming unusable. To lower the load average, try increasing a few
polling periods in the Groups > Basic page.
System Memory Usage The amount of RAM that is currently used broken down by usage. It is normal for
W-AirWave 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.
System Disk Throughput The rate of reading and writing from and to the disk in bytes per second.
System Swap Usage The amount of Swap memory used by W-AirWave. Swap is used when there is no
more free physical RAM. A large performance penalty is paid when swap is used.
If your W-AirWave consistently uses swap, you should consider installing
additional RAM.
System Disk IOPs The number of disk reads and writes per second.
System Disk Outstanding
I/O Requests
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.
System Disk Utilization The amount of data read from the disk and written to the disk.
System CPU Utilization The percentage of CPU that has been used by the user and the system as well as
the amount that was idle.
Process Counts by
Service
This breaks down network usage based on Web server, database, W-AirWave
Service, and VisualRF processes.
Average Delay Time by
Queue Type
This shows the queue time for Async logger clients and RAPIDS processing.
I/O Throughput by
Worker/by Service
Displays reads and writes for workers (W-AirWave services, database, VisualRF,
web server, RRD tool and AWRRD tool) and for services (W-AirWave, VisualRF and
web server).
CPU Utilization by
Worker/by Service
Displays reads and writes for workers (W-AirWave services, database, VisualRF,
web server, RRD tool and AWRRD tool) and for services (W-AirWave, VisualRF and
web server).
System Network Usage All traffic in and out measured in bits per second of your primary network
interface (Eth0 being the most common).
Table 119: System Performance Page Graphs (Continued)