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C3P0 Connection Pool Monitoring

Updated on 2024-07-04 GMT+08:00

This section describes the types, names, and meanings of C3P0 connection pool metrics collected by APM.

Table 1 Collection parameters for C3P0 connection pool monitoring

Parameter

Data Type

Application Type

Default

Supported Start Agent Version

Supported End Agent Version

Description

Threshold (ms) for Reporting Connection Trace

integer

JAVA

1

2.1.3

-

Threshold for reporting getConnection method traces. If the threshold is not exceeded, such traces will not be reported.

Obtain Pool Info or Not

radio

JAVA

false

2.1.3

-

Whether to obtain pool information when getting connections

Table 2 C3P0 connection pool metrics

Category

Metric

Name

Description

Unit

Data Type

Default Aggregation Mode

Data source (dataSource)

url

URL

URL

-

ENUM

LAST

driverClass

Driver

Driver

-

STRING

LAST

initialPoolSize

initialPoolSize

Number of initialized connections

-

INT

LAST

minPoolSize

minPoolSize

Minimum connection pool size

-

INT

LAST

maxPoolSize

maxPoolSize

Maximum connection pool size

-

INT

LAST

numIdleConnections

numIdleConnections

Number of idle connections

-

INT

LAST

numBusyConnections

numBusyConnections

Number of busy connections

-

INT

LAST

numConnections

numConnections

Total number of connections

-

INT

LAST

maxIdleTime

maxIdleTime

Maximum connection idle time

-

INT

LAST

idleConnectionTestPeriod

idleConnectionTestPeriod

Interval for checking for idle connections

-

INT

LAST

testConnectionOnCheckout

testConnectionOnCheckout

Connection validity check during check-out

-

STRING

LAST

testConnectionOnCheckin

Connection Validity Check During Check-In

Connection validity check during check-in

-

STRING

LAST

acquireRetryAttempts

Connection Retries

Number of Connection retry times

-

INT

LAST

acquireRetryDelay

Connection Retry Interval

Connection retry interval

-

INT

LAST

acquireIncrement

Connections Created If No Connection Exists

Number of connections created if no connection exists

-

INT

LAST

Connection details (connection)

url

Connection Address

Connection address

-

ENUM

LAST

invokeCount

Calls

Number of calls

-

INT

LAST

totalTime

Total Time

Total time

-

INT

LAST

errorCount

Errors

Number of errors

-

INT

SUM

maxTime

Max. RT

Maximum response time

-

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

500–1000 ms

Number of requests with 500–1000 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

concurrentMax

Max. Concurrency

Maximum concurrency

-

INT

MAX

Version (version)

version

Version

Version

-

STRING

LAST

Exception (exception: C3P0 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

Exception Stack

Exception stack information

-

CLOB

LAST

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