Azure Managed Apache Cassandra extension

Latest Dynatrace
Extension
Published Oct 27, 2025

Gain insights into your Azure Managed Cassandra Instance health and performance.

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Overview

Prometheus is an open-source monitoring toolkit for collecting and alerting on infrastructure and platform metrics. These metrics are exposed by Prometheus in OpenMetrics format. Prometheus exporters provide a standardized monitoring interface for numerous technologies and services.

By adding Dynatrace support to metrics collected from Prometheus exporters, you get intelligent observability and automatic root cause analysis for technologies such as Apache Cassandra, Redis, and Kafka. As well 100+ integrations maintained by the Prometheus community.

Use cases

Leverage Apache Cassandra Prometheus metrics to extend Dynatrace’s monitoring capabilities.
Monitor you Azure Managed Instance for Apache Cassandra Cluster.
Visualize Infrastructure (Cluster, Data Center, Rack, Node) and Data (Keyspace & Table) Metrics.
Proactively alert on anomalies of Prometheus metrics with Davis AI.

Compatibility information

ActiveGate version 1.231+

Activation and setup

Dynatrace integrates Gauge and Counter metrics from your Azure Managed Instance for Apache Cassandra Clusters.

Go to Dynatrace Hub and add the Azure Managed Instance for Apache Cassandra extension to your environment.
Create a monitoring configuration :
1. Use the API URL of your Prometheus Server (for example, http://localhost:9090/api/v1)
2. Select the ActiveGate Group that will run the extension.
3. Add a Description
4. Select the Feature Sets for this configuration
Save your configuration and start exploring the data in the pre-configured dashboard(s) and unified analysis pages.

Details

This extension is built on top of the Extensions framework using the Prometheus data source.

The extension package contains:

Prometheus DataSource configuration,
dashboard template,
Unified Analysis screen template,
topology definition and entity extraction rules.

More information can be found in the Documentation:

Prometheus Extensions

Collected metrics:

Storage Load
Storage Exceptions
Commit Log Pending Tasks
Commit Log Completed Tasks Total
Buffer Pool Size
Buffer Pool Misses Total
Client Connected Native Clients
Client Auth Failure Total
Client Auth Success Total
Storage Total Hints Total
CQL Prepared Statements Executed Total
CQL Regular Statements Executed Total
Dropped Messages Total
JVM GC Count
JVM GC Time
JVM Memory Used
JVM Memory Usage
Thread Pools Active Tasks
Thread Pools Total Blocked Tasks Total
Thread Pools Completed Tasks
Client Request Latency Total
Client Request Failures Total
Client Request Unavailables Total
Cache Hit Rate
Cache Capacity
Cache Misses Total
Cache Size
Keyspace All Memtables Live Data Size
Keyspace Bloom Filter Disk Space Used
Keyspace Live Disk Space Used
Keyspace Memtable Columns Count
Keyspace Memtable Live Data Size
Keyspace Memtable Switch Count
Keyspace Pending Compaction
Keyspace Pending Flushes
Keyspace Read Total Latency Total
Keyspace Total Disk Space Used
Keyspace Write Total Latency Total
Table Bloom Filter Disk Space Used
Table Bloom Filter False Positives
Table Bloom Filter False Ratio
Table Bloom Filter False Ratio
Table Bytes Flushed Total
Table Compaction Bytes Written Total
Table Compression Ratio
Table Compression Ratio
Table Dropped Mutations Total
Table Estimated Partition Count
Table Key Cache Hit Rate
Table Key Cache Hit Rate
Table Live Disk Space Used Total
Table Live SSTable Count
Table Memtable Columns Count
Table Memtable Live Data Size
Table Memtable Switch Count Total
Table Pending Compactions
Table Pending Flushes Total
Table Read Total Latency Total
Table Row Cache Hit Total
Table Row Cache Miss Total
Table Total Disk Space Used Total
Table Write Total Latency Total

Feature sets

When activating your extension using monitoring configuration, you can limit monitoring to one of the feature sets. To work properly the extension has to collect at least one metric after the activation.

In highly segmented networks, feature sets can reflect the segments of your environment. Then, when you create a monitoring configuration, you can select a feature set and a corresponding ActiveGate group that can connect to this particular segment.

All metrics that aren't categorized into any feature set are considered to be the default and are always reported.

A metric inherits the feature set of a subgroup, which in turn inherits the feature set of a group. Also, the feature set defined on the metric level overrides the feature set defined on the subgroup level, which in turn overrides the feature set defined on the group level.

Table Latency (total)

Metric name	Metric key	Description
Table Read Total Latency Total	mcac_table_read_total_latency_total.count	Read Latency for this table.
Table Write Total Latency Total	mcac_table_write_total_latency_total.count	Write Latency for this table.

Cluster Node Metrics

Metric name	Metric key	Description
Storage Load	mcac_storage_load_total	Size, in bytes, of the on disk data size this node manages.
Storage Exceptions	mcac_storage_exceptions_total.count	Number of internal exceptions caught. Under normal exceptions this should be zero.
Commit Log Pending Tasks	mcac_commit_log_pending_tasks	Number of commit log messages written but yet to be fsync’d.
Commit Log Completed Tasks Total	mcac_commit_log_total_commit_log_size.count	Total number of commit log messages written since [re]start.
Buffer Pool Size	mcac_buffer_pool_size	Size, in bytes, of the managed buffer pool
Buffer Pool Misses Total	mcac_buffer_pool_misses_total.count	The number of misses in the pool. The higher this is the more allocations incurred.
Client Connected Native Clients	mcac_client_connected_native_clients	Number of clients connected to this nodes native protocol server.
Client Auth Failure Total	mcac_client_auth_failure_total.count	Number of clients who experience authentication failures.
Client Auth Success Total	mcac_client_auth_success_total.count	Number of clients who successfully authenticate.
Storage Total Hints Total	mcac_storage_total_hints_total.count	Number of hint messages written to this node since [re]start. Includes one entry for each host to be hinted per hint.
CQL Prepared Statements Executed Total	mcac_cql_prepared_statements_executed_total.count	Number of prepared statements executed.
CQL Regular Statements Executed Total	mcac_cql_regular_statements_executed_total.count	Number of non prepared statements executed.
Dropped Messages Total	mcac_dropped_message_dropped_total.count	Number of dropped messages.
JVM GC Count	mcac_jvm_gc_count.count	Total number of collections that have occurred
JVM GC Time	mcac_jvm_gc_time.count	Approximate accumulated collection elapsed time in milliseconds.
JVM Memory Used	mcac_jvm_memory_used	Amount of used memory in bytes
JVM Usage (raw)	mcac_jvm_memory_usage_raw	Ratio of used to maximum memory
Thread Pools Active Tasks	mcac_thread_pools_active_tasks	Number of tasks being actively worked on by this pool.
Thread Pools Total Blocked Tasks Total	mcac_thread_pools_total_blocked_tasks_total.count	Number of tasks that were blocked due to queue saturation.
Thread Pools Completed Tasks	mcac_thread_pools_completed_tasks	Number of tasks completed.
Client Request Latency	mcac_client_request_latency	—
Client Request Failures Total	mcac_client_request_failures_total.count	Number of transaction failures encountered.
Client Request Unavailables Total	mcac_client_request_unavailables_total.count	Number of unavailable exceptions encountered.
Cache Hit Rate (raw)	mcac_cache_hit_rate_raw	—
Cache Capacity	mcac_cache_capacity	Cache capacity in bytes.
Cache Misses Total	mcac_cache_misses_total.count	Total number of cache misses.
Cache Size	mcac_cache_size	Total size of occupied cache, in bytes.

Tables Metrics

Metric name	Metric key	Description
Table Range Latency	mcac_table_range_latency	—
Table Read Latency	mcac_table_read_latency	—
Table Write Latency	mcac_table_write_latency	—
Table Bloom Filter Disk Space Used	mcac_table_bloom_filter_disk_space_used	Disk space used by bloom filter (in bytes).
Table Bloom Filter False Positives	mcac_table_bloom_filter_false_positives	Number of false positives on table’s bloom filter.
Table Bloom Filter False Ratio	mcac_table_bloom_filter_false_ratio_raw	—
Table Bytes Flushed Total	mcac_table_bytes_flushed_total.count	Total number of bytes flushed since server [re]start.
Table Compaction Bytes Written Total	mcac_table_compaction_bytes_written_total.count	Total number of bytes compacted since server [re]start.
Table Compression Ratio	mcac_table_compression_ratio_raw	—
Table Dropped Mutations Total	mcac_table_dropped_mutations_total.count	Number of dropped mutations on this table.
Table Estimated Partition Count	mcac_table_estimated_partition_count.gauge	Approximate number of keys in table.
Table Key Cache Hit Rate	mcac_table_key_cache_hit_rate_raw	—
Table Live Disk Space Used Total	mcac_table_live_disk_space_used_total	Disk space used by SSTables belonging to this table (in bytes).
Table Live SSTable Count	mcac_table_live_ss_table_count.gauge	Number of SSTables on disk for this table.
Table Memtable Columns Count	mcac_table_memtable_columns_count.gauge	Total number of columns present in the memtable.
Table Memtable Live Data Size	mcac_table_memtable_live_data_size	Total amount of live data stored in the memtable, excluding any data structure overhead.
Table Memtable Switch Count Total	mcac_table_memtable_switch_count_total.count	Number of times flush has resulted in the memtable being switched out.
Table Pending Compactions	mcac_table_pending_compactions	Estimate of number of pending compactions for this table.
Table Pending Flushes Total	mcac_table_pending_flushes_total.count	Estimate of number of pending flushes for this table.
Table Row Cache Hit Total	mcac_table_row_cache_hit_total.count	Number of table row cache hits.
Table Row Cache Miss Total	mcac_table_row_cache_miss_total.count	Number of table row cache misses.
Table Total Disk Space Used Total	mcac_table_total_disk_space_used_total	Total disk space used by SSTables belonging to this table, including obsolete ones waiting to be GC’d.

Client Requests (total)

Metric name	Metric key	Description
Client Request Latency Total	mcac_client_request_latency_total.count	Latency of Client Requests.

Keyspace Metrics

Metric name	Metric key	Description
Keyspace All Memtables Live Data Size	mcac_keyspace_all_memtables_live_data_size	Total amount of live data stored in the memtables (2i and pending flush memtables included) that resides off-heap, excluding any data structure overhead.
Keyspace Bloom Filter Disk Space Used	mcac_keyspace_bloom_filter_disk_space_used	Disk space used by bloom filter (in bytes).
Keyspace Live Disk Space Used	mcac_keyspace_live_disk_space_used	Disk space used by SSTables belonging to this table (in bytes).
Keyspace Memtable Columns Count	mcac_keyspace_memtable_columns_count.gauge	Total number of columns present in the memtable.
Keyspace Memtable Live Data Size	mcac_keyspace_memtable_live_data_size	Total amount of live data stored in the memtable, excluding any data structure overhead.
Keyspace Memtable Switch Count	mcac_keyspace_memtable_switch_count.gauge	Number of times flush has resulted in the memtable being switched out.
Keyspace Pending Compaction	mcac_keyspace_pending_compactions	Estimated number of compactions remaining to perform.
Keyspace Pending Flushes	mcac_keyspace_pending_flushes	Estimated number of flush tasks pending for this table.
Keyspace Total Disk Space Used	mcac_keyspace_total_disk_space_used	Total disk space used by SSTables belonging to this table, including obsolete ones waiting to be GC’d.
Keyspace Read Latency	mcac_keyspace_read_latency	—
Keyspace Write Latency	mcac_keyspace_write_latency	—

Keyspace Latency (total)

Metric name	Metric key	Description
Keyspace Read Total Latency Total	mcac_keyspace_read_total_latency_total.count	Read latency
Keyspace Write Total Latency Total	mcac_keyspace_write_total_latency_total.count	Write Latency

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Gain insights into your Azure Managed Cassandra Instance health and performance.