Data Collection

After you enable data collection, APM collects application performance metrics and tracing data. Your personal privacy data will not be collected. The collected data will be used only for application performance analysis and fault diagnosis, and will not be used for commercial purposes.

Data Type	Collected Data	Transmission Mode	Storage Mode	Function	Storage Period
Performance metric data	JVM data, exceptions, databases, SQL statements, and middleware call data	WebSocket Secure (WSS)	Tenant-based isolated storage on the server	Metric query and display at the frontend	7 days for the basic edition and 30 days for the enterprise edition. The data will be permanently deleted upon expiration.
Tracing data	Trace event data, including middleware invocation data	WSS	Tenant-based isolated storage on the server	Query and display at the tracing frontend	7 days for the basic edition and 30 days for the enterprise edition. The data will be permanently deleted upon expiration.
Resource information	Service type, service name, creation time, deletion time, node address, and service release API	WSS	Tenant-based isolated storage on the server	Query and display at the resource library frontend	7 days for the basic edition and 30 days for the enterprise edition. The data will be permanently deleted upon expiration.
Resource attributes	System type, system startup event, number of CPUs, service executor, service process ID, service pod ID, CPU label, system version, web framework, JVM version, time zone, system name, collector version, and LastMail URL	WSS	Tenant-based isolated storage on the server	Query and display at the resource library frontend	7 days for the basic edition and 30 days for the enterprise edition. The data will be permanently deleted upon expiration.

**Table 1** Restrictions on collection items
Collection Item	Maximum Value
Monitoring item rows	500
SQL length	2000 characters
SQL result bodies	100
SQL result body content	999 characters
Redis body length	100 characters
Mongo clusters	10
Mongo command length	2000 characters
HBase command length	500 characters
ES RestClients	10
Cassandra CQL length	2000 characters
Cassandra sessions	10
Kafka MBean object names	100
Cache IP addresses corresponding to Kafka client IDs	100
RabbitMQ connection addresses	20
Cache connections for each RabbitMQ address	100
RabbitMQ consumers	500
Cache channels for each RabbitMQ consumer	100
RabbitMQ messages without ACK in each channel	3000
Manual ACK consumers in RabbitMQ cache	20
RocketMQ PIDs	20
RocketMQ client IDs	20
Jetcd tag length	500 characters
HttpClient connections	10
Report time of connection pool trace	1 ms
Dubbo invocation length	500 characters
Dubbo attachment length	500 characters
URL body length	9999 characters
Application code body length	0 characters
Java method body length	8192 characters