JBoss 池的 IdleCount 值为负

Question

有时，在检查我的 JBoss 7.1 连接池状态 (JDBC) 时，我看到 IdleCount 的负值，如下例所示"IdleCount" => -7.

谁能解释一下这个负值的含义？

"pool" => {
"ActiveCount" => 13,
"AvailableCount" => 230,
"AverageBlockingTime" => 1L,
"AverageCreationTime" => 76L,
"AverageGetTime" => 2L,
"AveragePoolTime" => 306L,
"AverageUsageTime" => 241L,
"BlockingFailureCount" => 0,
"CreatedCount" => 13,
"DestroyedCount" => 0,
"IdleCount" => -7,
"InUseCount" => 20,

Answer 1

IdleCount 是使用 ActiveCout - InUseCount 计算的。

例如IdleCount = ActiveCount - InUseCount => 13-20 = -7

这就是它在池统计信息中显示 -7 的原因。

参考code base

JBoss 池的 IdleCount 值为负

JBoss pool has negative value for IdleCount

jboss

jdbc

wildfly