lt
Less than operator. There are two variants of the :lt operator.
Choosing
| Input Stack: |
⇨ |
Output Stack: |
This first variant is used for choosing the set of time series to
operate on. It selects time series that have a value for a key that is less than
a specified value. For example, consider the following query:
name,ssCpuSystem,:lt
When matching against the sample data in the table below, the highlighted time series would be
included in the result set:
| Name | nf.app | nf.node |
| ssCpuUser |
alerttest |
i-0123 |
| ssCpuSystem |
alerttest |
i-0123 |
| ssCpuUser |
nccp |
i-0abc |
| ssCpuSystem |
nccp |
i-0abc |
| numRequests |
nccp |
i-0abc |
| ssCpuUser |
api |
i-0456 |
Math
Input Stack:| ts2: TimeSeriesExpr | | ts1: TimeSeriesExpr |
|
⇨ |
Output Stack:| (ts1 < ts2): TimeSeriesExpr | | |
|
Compute a new time series where each interval has the value (a < b) where a
and b are the corresponding intervals in the input time series. For example:
| Time |
a |
b |
a < b |
| 00:01 |
0.0 |
0.0 |
0.0 |
| 00:01 |
0.0 |
1.0 |
1.0 |
| 00:02 |
1.0 |
0.0 |
0.0 |
| 00:03 |
1.0 |
1.0 |
0.0 |
| 00:04 |
0.5 |
1.7 |
1.0 |
The result will be a signal time series that will
be 1.0 for intervals where the condition is true and 0.0 for intervals where it is false.
Example:
