Selecting A Time Frame To Analyze; Analyzing Data Without Any Filters - Network Instruments GigaStor User Manual

This option...
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Options and Type

Selecting a time frame to analyze

The GigaStor Control Panel has two graphs along the top: a Detail Chart and below it a Outline Chart. The Detail
chart shows a shorter time frame. The Outline Chart shows a longer time frame with the Detail Chart being a
portion of time from within Outline Chart.
You can configure the resolution of Detail Charts by clicking the "Screen resolution" option and using the slider
to pick a time resolution. It can be anything from 8 hours/8 weeks so that you can see longer term trends to as
short as 10 nanoseconds/500 nanoseconds to focus on specific issues. At the shorter time resolutions you can
enable microburst analysis. The "Data type" list specifies what type of data appears in the Detail Chart.
You can configure the amount of time shown on the Outline Chart by right-clicking it and choosing "Outline
Time Resolution." It is measured in multiples of the Detail Chart. You may also choose to show packets or load in
the chart.
If you know the time when something occurred that you want to investigate, you can jump to that time by right-
clicking the Detail Chart and choosing Go to Specific Time.
The FIFO/sampling/cpu gauge on the right side tracks how well GigaStor's disk hardware is keeping up with the
current trafficload. Its data is only for the active GigaStor instance (the data always reads "0" for passive GigaStor
instances) and indicates the following:
FIFO – shows how efficiently the probe is processing and monitoring packets
Sampling – indicates the ratio of how many packets are being sampled/processed compared to the
number of packets witnessed. It is shown as: 1/sampling divider
CPU – How much CPU the probe is using to sample packets
If the FIFO gauge shows 90% or greater, you should consider reducing the load using one or more of the
following methods:
Allocate more memory to the GigaStor instance.
Activate partial packet capture or reduce the size of portion captured.
Activate dynamic sampling, or increase the fixed sampling ratio.
Bits/sec in Interval
Bytes/sec in Interval
Bytes/sec in Interval with IFG
Megabytes/sec
# of packets/Interval
Max # of microbursts in Interval
Max bits of duration from Utilization Threshold
# of bits per Duration for microburst
# of packets in Duration

Analyzing data without any filters

1. Select a time frame you want to analyze. See
Allow you to do this...
The selected the last analysis options are used for any subsequent analysis. This is
useful if you typically use the same analysis options repeatedly.
Selecting a time frame to
10% 50%
1,000,000 5,000,000
124.476 617,826
125,000 625,000
0.119 0.596
82 407
10 10
100,000 500,000
50,000 250,000
4.064 20.319
analyze.
Selecting a time frame to analyze | 35
90%
9,000,000
1,111,176
1,125,000
1.073
732
10
900,000
450,000
36.573