Users Guide

228 | Performing Daily Administration in AirWave Dell PowerConnect W-AirWave 7.6 | User Guide
Field Description
6x is a serious issue and will probably result in 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 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 Utilization The amount of data read from the disk and written to the disk.
System Disk IOPs The number of disk reads and writes per second.
System Disk Throughput The rate of reading and writing from and to the disk in bytes 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 Swap Usage
The amount of Swap memory used by AirWave. Swap is used when the there is no more free
physical RAM. A large performance penalty is paid when swap is used. If an AirWave
consistently uses swap, you should consider installing additional RAM.
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.
I/O Throughput by
Worker/by Service
Displays reads and writes for workers (AirWave services, database, VisualRF, web server,
RRD tool and AWRRD tool) and for services (AirWave, VisualRF and web server).
CPU Utilization by
Worker/by Service
Displays reads and writes for workers (AirWave services, database, VisualRF, web server,
RRD tool and AWRRD tool) and for services (AirWave, VisualRF and web server).
System Network Bandwidth
All traffic in and out measured in bits per second of your primary network interface (Eth0
being the most common).
Bandwidth by Protocol
Displays the amount of traffic used by Telnet, HTTPS and SNMP used by your primary
network interface (Eth0 being the most common).
Legacy SNMP Fetcher
Requests
The number of SNMP get and walk requests per second performed by the legacy (v1 and v3)
SNMP fetcher.
Legacy SNMP Fetcher
Responses
The number of SNMP OIDs received per second performed by the legacy (v1 and v3) SNMP
fetcher.
High Performance SNMP
Fetcher Requests
The number of SNMP get and walk requests per second performed by the high performance
SNMP (v2c) fetcher.
High Performance SNMP
Fetcher Responses
The number of SNMP OIDs received per second performed by the high performance SNMP
(v2c) fetcher.
Database Statistics
Top 5 Tables (by row count)
The five largest tables in AirWave. Degraded performance has been noticed for in some
cases for tables over 200,000 rows. Decreasing the length of time client data is stored on the
AirWave page is recommended if a user/client table exceeds 250,000 rows.
Database Table Scans The number of database table scans performed by the database.