Azure Managed Instance for Apache Cassandra monitoring & observability

Metric name	Metric key	Description	Unit
Table Bloom Filter Disk Space Used	mcac_table_bloom_filter_disk_space_used	Disk space used by bloom filter (in bytes).	Byte
Table Bloom Filter False Positives	mcac_table_bloom_filter_false_positives	Number of false positives on table’s bloom filter.	Count
Table Bloom Filter False Ratio	mcac_table_bloom_filter_false_ratio_raw	-	Count
Table Bytes Flushed Total	mcac_table_bytes_flushed_total.count	Total number of bytes flushed since server [re]start.	Count
Table Compaction Bytes Written Total	mcac_table_compaction_bytes_written_total.count	Total number of bytes compacted since server [re]start.	Count
Table Compression Ratio	mcac_table_compression_ratio_raw	-	Count
Table Dropped Mutations Total	mcac_table_dropped_mutations_total.count	Number of dropped mutations on this table.	Count
Table Estimated Partition Count	mcac_table_estimated_partition_count.gauge	Approximate number of keys in table.	Count
Table Key Cache Hit Rate	mcac_table_key_cache_hit_rate_raw	-	Count
Table Live Disk Space Used Total	mcac_table_live_disk_space_used_total	Disk space used by SSTables belonging to this table (in bytes).	Byte
Table Live SSTable Count	mcac_table_live_ss_table_count.gauge	Number of SSTables on disk for this table.	Count
Table Memtable Columns Count	mcac_table_memtable_columns_count.gauge	Total number of columns present in the memtable.	Count
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.	Byte
Table Memtable Switch Count Total	mcac_table_memtable_switch_count_total.count	Number of times flush has resulted in the memtable being switched out.	Count
Table Pending Compactions	mcac_table_pending_compactions	Estimate of number of pending compactions for this table.	Count
Table Pending Flushes Total	mcac_table_pending_flushes_total.count	Estimate of number of pending flushes for this table.	Count
Table Read Total Latency Total	mcac_table_read_total_latency_total.count	Read Latency for this table.	MilliSecond
Table Row Cache Hit Total	mcac_table_row_cache_hit_total.count	Number of table row cache hits.	Count
Table Row Cache Miss Total	mcac_table_row_cache_miss_total.count	Number of table row cache misses.	Count
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.	Byte
Table Write Total Latency Total	mcac_table_write_total_latency_total.count	Write Latency for this table.	MilliSecond

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

Metric name	Metric key	Description	Unit
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.	Byte
Keyspace Bloom Filter Disk Space Used	mcac_keyspace_bloom_filter_disk_space_used	Disk space used by bloom filter (in bytes).	Byte
Keyspace Live Disk Space Used	mcac_keyspace_live_disk_space_used	Disk space used by SSTables belonging to this table (in bytes).	Byte
Keyspace Memtable Columns Count	mcac_keyspace_memtable_columns_count.gauge	Total number of columns present in the memtable.	Count
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.	Byte
Keyspace Memtable Switch Count	mcac_keyspace_memtable_switch_count.gauge	Number of times flush has resulted in the memtable being switched out.	Count
Keyspace Pending Compaction	mcac_keyspace_pending_compactions	Estimated number of compactions remaining to perform.	Count
Keyspace Pending Flushes	mcac_keyspace_pending_flushes	Estimated number of flush tasks pending for this table.	Count
Keyspace Read Total Latency Total	mcac_keyspace_read_total_latency_total.count	Read latency	MilliSecond
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.	Byte
Keyspace Write Total Latency Total	mcac_keyspace_write_total_latency_total.count	Write Latency	MilliSecond