NodeJsHttpClient Monitoring

This section describes the types, names, and meanings of NodeJsHttpClient metrics collected by APM.

**Table 1** NodeJsHttpClient monitoring metrics
Category	Metric	Name	Description	Unit	Data Type	Default Aggregation Mode
Exception (exception: HttpClient call exception statistics)	exceptionType	Exception Type	Exception type	-	ENUM	LAST
	causeType	Exception Class	Exception class	-	ENUM	LAST
	count	Count	Number of times the exception has occurred	-	INT	SUM
	message	Exception Message	Message returned when the exception occurred	-	STRING	LAST
	stackTrace	stackTrace	Exception stack information	-	CLOB	LAST
Cluster metrics (hostInvocation: APM counts HttpClient URL call statistics by the called party's cluster.)	envId	Cluster ID	Cluster ID of the called party	-	ENUM	LAST
	hostUri	Called Address	Called address	-	STRING	LAST
	errorCount	Errors	Number of errors that occur when the cluster URL is called	-	INT	SUM
	invokeCount	Calls	Number of times that the cluster URL is called	-	INT	SUM
	maxTime	Max. RT	Maximum response time for calling the cluster URL	-	INT	MAX
	totalTime	Total RT	Total response time for calling the cluster URL	-	INT	SUM
	responseCloseCount	Closed Responses	Number of closed responses when the cluster URL is called	-	INT	SUM
	range1	0–10 ms	Number of requests with 0–10 ms response time	-	INT	SUM
	range2	10–100 ms	Number of requests with 10–100 ms response time	-	INT	SUM
	range3	100–500 ms	Number of requests with 100–500 ms response time	-	INT	SUM
	range4	500–1,000 ms	Number of requests with 500–1,000 ms response time	-	INT	SUM
	range5	1–10s	Number of requests with 1–10s response time	-	INT	SUM
	range6	> 10s	Number of requests with response time longer than 10s	-	INT	SUM
	ranges	Custom RT Range	Custom response time range	-	STRING	LAST
URL monitoring (invocation: APM counts URL call statistics by URL.)	url	url	Called URL	-	ENUM	LAST
	method	httpmethod	HTTP method of the URL	-	ENUM	LAST
	client	Client Type	HTTP client type	-	ENUM	LAST
	concurrentMax	Max. Concurrency	Maximum concurrency of the URL	-	INT	MAX
	errorCount	Errors	Number of call errors of the URL	-	INT	SUM
	errorTraceId	Error Trace ID	ID of the trace that encounters an error in a collection period	-	STRING	LAST
	slowTraceId	Slowest Trace ID	ID of the slowest trace in a collection period	-	STRING	LAST
	hostUri	Called Address	Called URL address	-	STRING	LAST
	invokeCount	Calls	Number of times that the URL is called	-	INT	SUM
	lastError	Error Message	Error details	-	STRING	LAST
	maxTime	maxTime	Maximum response time of the called URL	-	INT	MAX
	responseCloseCount	responseCloseCount	Number of closed responses when the URL is called	-	INT	SUM
	totalTime	Total RT	Total response time of the called URL	-	INT	SUM
	range1	0–10 ms	Number of requests with 0–10 ms response time	-	INT	SUM
	range2	10–100 ms	Number of requests with 10–100 ms response time	-	INT	SUM
	range3	100–500 ms	Number of requests with 100–500 ms response time	-	INT	SUM
	range4	500–1,000 ms	Number of requests with 500–1,000 ms response time	-	INT	SUM
	range5	1–10s	Number of requests with 1–10s response time	-	INT	SUM
	range6	> 10s	Number of requests with response time longer than 10s	-	INT	SUM
	ranges	Custom RT Range	Custom response time range	-	STRING	LAST
	envId	Cluster ID	Cluster ID corresponding to the called URL	-	STRING	LAST
Status code statistics (code: APM counts URL call statistics by status code.)	code	Status Code	Status code	-	ENUM	LAST
	url	url	URL that returns the status code	-	STRING	LAST
	count	Count	Number of times that the status code has occurred	-	INT	SUM
HttpClient summary (total: summary about HttpClient call statistics)	errorCount	Errors	Total number of errors	-	INT	SUM
	invokeCount	Calls	Total number of calls	-	INT	SUM
	responseCloseCount	Closed Responses	Total number of responses that are closed	-	INT	SUM
	totalTime	Total RT	Total response time	-	INT	SUM