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Measures reported by AWSAggregatedTest
When users launch an instance using the AWS management console, they need to specify the instance type. An instance type is a specification that defines the memory, CPU, storage capacity, and hourly cost for an instance. Some instance types are designed for standard applications, whereas others are designed for CPU-intensive applications, or memory-intensive applications, etc.
By closely monitoring the CPU usage and the network and disk I/O of each instance type, and comparing these metrics across instance types, you can quickly isolate resource-intensive types. Once again, the test will report metrics for only those types of instances that were launched by the AWS user account configured for the test.
The measures
made by this test are as
follows:
| Measurement |
Description |
Measurement Unit |
Interpretation |
| Cpu_used |
Indicates the percentage of allocated CPU consumed by all instances of this type.
|
Percent |
A high value for this measure indicates that one/more instances of a type are utilizing CPU excessively - this could be because of one/more resource-intensive processes executing on the instances.
Compare the value of this measure across types to identify the types of instances that are CPU-intensive.
|
| Network_in |
Indicates the rate of incoming network traffic i.e., the rate at which the bytes are received by all the network interfaces connected to all the instances of this instance type.
|
KB/Sec |
Compare the values of these measures across instance types to quickly identify the types of instances that are utilizing the network bandwidth excessively. |
| Network_out |
Indicates the volume of outgoing network traffic i.e., the rate at which the bytes are transferred from all the network interfaces connected to all the instances of a particular instance type.
|
KB/Sec |
| Disk_reads |
Indicates the rate at which data is read from the disks of all instances of this type. |
KB/Sec |
These measures are good indicators of the level of disk I/O activity on an instance type. By comparing the values of these measures across types, you can accurately determine the type of instances that is performing I/O-intensive operations. |
| Disk_writes |
Indicates the rate at which data is written to the disks of all instances of this type. |
KB/Sec |
| Disk_read_op |
Indicates the rate at which disk read operations were performed on the disks of all instances of this type. |
Operations/Sec |
These measures are good indicators of the level of disk I/O activity on an instance type. By comparing the values of these measures across types, you can accurately determine the type of instances that is performing I/O-intensive operations. |
| Disk_write_op |
Indicates the rate at which disk write operations were performed on the disks of all instances of this type. |
Operations/Sec |
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