Description
This template monitors metrics related to client request, storage and threadpool. It is applicable on devices containing Cassandra application.
Prerequisites
Java should be installed on the device. Gateway should be up and running. The device should be reachable from Gateway. The device should be in managed state.
How to Apply: For Cassandra, we have Instance Based Monitoring or Component Discovery Monitoring . In order to do that, we should add the following custom parameter:
application.component.name : ClientRequest
application.component.name : ThreadPool
Create different monitors for different components in Instance based monitoring.
Only one component is allowed per monitor in Instance based monitoring.
We have three different types of Component Discovery Monitoring. They are:
For a single component :
ALL : ALL your instances will be monitored.
Expression : The Instance Names that match the expression will be monitored.
Manual Selection : With this option, you can select the desired instances while applying templates to the device.
Metric Parameters
| Parameter | Description |
|---|---|
| Frequency | Warning Threshold | If the metric value satisfies the condition defined along with Warning Threshold value, then a notification is sent to the user. |
| Critical Threshold | If the metric value satisfies the condition defined along with Critical Threshold value, then a notification is sent to the user. |
| Alert | The alert value can be set to either Yes or No. If it is Yes, then an alert message is sent to the user. |
Metrics
cassandra.threadpools.currently_blocked_tasks_count
Metric Details
| Applicable for | Device |
| Description | The number of currently blocked tasks for the thread pool. |
| Category | Application |
| Collector Type | Gateway |
| Monitor Name | Cassandra Threadpool Monitor |
| Unit | count |
Possible Inputs
| Metric | Input Value | Range of Values |
|---|---|---|
| Frequency | 5 | 1 – 1440 (mins) |
| Filter | ||
| Warning Operator | ||
| Warning Threshold | ||
| Warning Repeat Count | ||
| Critical Operator | ||
| Critical Threshold | ||
| Critical Repeat Count | ||
| Alert | No | Yes/No |
| Graph (Yes/No) | Yes | Yes/No |
Sample Output
No graph
cassandra.threadpools.pending_tasks
Metric Details
| Applicable for | Device |
| Description | The number of pending tasks for the thread pool. |
| Category | Application |
| Collector Type | Gateway |
| Monitor Name | Cassandra Threadpool Monitor |
| Unit | count |
Possible Inputs
| Metric | Input Value | Range of Values |
|---|---|---|
| Frequency | 5 | 1 – 1440 (mins) |
| Filter | ||
| Warning Operator | ||
| Warning Threshold | ||
| Warning Repeat Count | ||
| Critical Operator | ||
| Critical Threshold | ||
| Critical Repeat Count | ||
| Alert | No | Yes/No |
| Graph (Yes/No) | Yes | Yes/No |
Sample Output
No graph
cassandra.threadpools.interrnal.total_blocked_tasks
Metric Details
| Applicable for | Device |
| Description | Total count of blocked tasks |
| Category | Application |
| Collector Type | Gateway |
| Monitor Name | Cassandra Threadpool Monitor |
| Unit | count |
Possible Inputs
| Metric | Input Value | Range of Values |
|---|---|---|
| Frequency | 5 | 1 – 1440 (mins) |
| Filter | ||
| Warning Operator | ||
| Warning Threshold | ||
| Warning Repeat Count | ||
| Critical Operator | ||
| Critical Threshold | ||
| Critical Repeat Count | ||
| Alert | No | Yes/No |
| Graph (Yes/No) | Yes | Yes/No |
Sample Output
No graph
cassandra.clientrequest.latency.75th_percentile
Metric Details
| Applicable for | Device |
| Description | The client request latency - p75. |
| Category | Application |
| Collector Type | Gateway |
| Monitor Name | Cassandra ClientRequest Monitor |
| Unit | microsec |
Possible Inputs
| Metric | Input Value | Range of Values |
|---|---|---|
| Frequency | 5 | 1 – 1440 (mins) |
| Filter | ||
| Warning Operator | ||
| Warning Threshold | ||
| Warning Repeat Count | ||
| Critical Operator | ||
| Critical Threshold | ||
| Critical Repeat Count | ||
| Alert | No | Yes/No |
| Graph (Yes/No) | Yes | Yes/No |
Sample Output
No graph
cassandra.clientrequest.latency.95th_percentile
Metric Details
| Applicable for | Device |
| Description | The client request latency - p95. |
| Category | Application |
| Collector Type | Gateway |
| Monitor Name | Cassandra ClientRequest Monitor |
| Unit | microsec |
Possible Inputs
| Metric | Input Value | Range of Values |
|---|---|---|
| Frequency | 5 | 1 – 1440 (mins) |
| Filter | ||
| Warning Operator | ||
| Warning Threshold | ||
| Warning Repeat Count | ||
| Critical Operator | ||
| Critical Threshold | ||
| Critical Repeat Count | ||
| Alert | No | Yes/No |
| Graph (Yes/No) | Yes | Yes/No |
Sample Output
No graph
cassandra.clientrequest.latency.one_minute_rate
Metric Details
| Applicable for | Device |
| Description | The number of client requests. |
| Category | Application |
| Collector Type | Gateway |
| Monitor Name | Cassandra ClientRequest Monitor |
| Unit | Req per Sec |
Possible Inputs
| Metric | Input Value | Range of Values |
|---|---|---|
| Frequency | 5 | 1 – 1440 (mins) |
| Filter | ||
| Warning Operator | ||
| Warning Threshold | ||
| Warning Repeat Count | ||
| Critical Operator | ||
| Critical Threshold | ||
| Critical Repeat Count | ||
| Alert | No | Yes/No |
| Graph (Yes/No) | Yes | Yes/No |
Sample Output
No graph
cassandra.storage.exceptions.count
Metric Details
| Applicable for | Device |
| Description | The number of exceptions thrown from Storage metrics. |
| Category | Application |
| Collector Type | Gateway |
| Monitor Name | Cassandra Storage Monitor |
| Unit | count |
Possible Inputs
| Metric | Input Value | Range of Values |
|---|---|---|
| Frequency | 5 | 1 – 1440 (mins) |
| Filter | ||
| Warning Operator | ||
| Warning Threshold | ||
| Warning Repeat Count | ||
| Critical Operator | ||
| Critical Threshold | ||
| Critical Repeat Count | ||
| Alert | No | Yes/No |
| Graph (Yes/No) | Yes | Yes/No |
Sample Output
No graph