Once you’ve integrated with AWS CloudWatch, you have access to all metrics for the DAX service, which provides an in-memory cache for DynamoDB.
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To verify metrics are reporting, search for the metrics on the Metric details page in Project settings.
The following table shows the DAX metrics ingested by Lightstep.
|aws.dax.cpu_utilization||percent||The percent of CPU utilization in a node or cluster.|
|aws.dax.cache_memory_utilization||percent||The percent of cache memory in use by the item cache and query cache on a node or cluster. Cached data starts to be evicted when memory usage reaches 100%. If cache memory utilization reaches 100% on any node, write requests will be slowed down and you should consider switching to a larger node type.|
|aws.dax.network_bytes_in||bytes||The number of bytes received on all network interfaces by a node or cluster.|
|aws.dax.network_bytes_out||bytes||The number of bytes sent out on all network interfaces by a node or cluster. This metric shows the volume of outgoing traffic in terms of the number of bytes on a single node or cluster.|
|aws.dax.network_packets_in||count||The number of packets received on all network interfaces by a node or cluster.|
|aws.dax.network_packets_out||count||The number of packets sent out on all network interfaces by a node or cluster. This metric shows the volume of outgoing traffic in terms of the number of packets on a single node or cluster.|
|aws.dax.get_item_request_count||count||The number of
|aws.dax.batch_get_item_request_count||count||The number of
|aws.dax.batch_write_item_request_count||count||The number of
|aws.dax.delete_item_request_count||count||The number of
|aws.dax.put_item_request_count||count||The number of
|aws.dax.update_item_request_count||count||The number of
|aws.dax.transact_write_items_count||count||The number of
|aws.dax.query_request_count||count||The number of Query requests handled by a node or cluster.|
|aws.dax.scan_request_count||count||The number of Scan requests handled by a node or cluster.|
|aws.dax.evicted_size||bytes||The number of bytes evicted from the cache on a node or cluster. This can happen if the cache memory utilization reaches 100% (see the
|aws.dax.disk_utilization||percent||The percent of disk space in use by a node or cluster.|
|aws.dax.read_capacity_units||count||The number of read capacity units (RCUs) consumed by a node or cluster. RCUs measure the number of read requests handled by a node or cluster.|
|aws.dax.write_capacity_units||count||The number of write capacity units (WCUs) consumed by a node or cluster. WCUs measure the number of write requests handled by a node or cluster.|