Cassandra Alerts
Sumo Logic has provided out-of-the-box alerts available via Sumo Logic monitors to help you quickly determine if the Cassandra cluster is available and performing as expected.
| Alert Name | Alert Description | Alert Condition | Recover Condition |
|---|---|---|---|
|
Cassandra - Increase in Authentication Failures |
This alert fires when there is an increase of Cassandra authentication failures. |
>5 | <= 5 |
|
Cassandra - Cache Hit Rate below 85 Percent |
This alert fires when the cache key hit rate is below 85%. |
<85 | >= 85 |
|
Cassandra - High Commitlog Pending Tasks |
This alert fires when there are more than 15 Commitlog tasks that are pending. |
>15 | <= 15 |
|
Cassandra - High Number of Compaction Executor Blocked Tasks |
This alert fires when there are more than 15 compaction executor tasks blocked for more than 5 minutes. |
>15 | <= 15 |
|
Cassandra - Compaction Task Pending |
This alert fires when there are many Cassandra compaction tasks that are pending. You might need to increase I/O capacity by adding nodes to the cluster. |
>100 | <= 100 |
|
Cassandra - High Number of Flush Writer Blocked Tasks |
This alert fires when there is a high number of flush writer tasks which are blocked. |
>15 | <= 15 |
|
Cassandra - Many Compaction Tasks Are Pending |
Many Cassandra compaction tasks are pending |
>100 | <= 100 |
|
Cassandra - Node Down |
This alert fires when one or more Cassandra nodes are down |
>0 | <= 0 |
|
Cassandra - Blocked Repair Tasks |
This alert fires when the repair tasks are blocked |
>2 | <= 2 |
|
Cassandra - Repair Tasks Pending |
This alert fires when repair tasks are pending. |
>2 | <= 2 |
|
Cassandra - High Tombstone Scanning |
This alert fires when tombstone scanning is very high (>1000 99th Percentile) in queries. |
>1000 | <= 1000 |