Question

我将带有hibernate的ehcache与spring数据一起使用。作为连接池，我使用hikaricp。

以下是一个查询的hibernate日志：

2016-04-24 17:03:16 INFO  [qtp603358340-29] StatisticalLoggingSessionEventListener: Session Metrics {
    0 nanoseconds spent acquiring 0 JDBC connections;
    0 nanoseconds spent releasing 0 JDBC connections;
    0 nanoseconds spent preparing 0 JDBC statements;
    0 nanoseconds spent executing 0 JDBC statements;
    0 nanoseconds spent executing 0 JDBC batches;
    0 nanoseconds spent performing 0 L2C puts;
    89979 nanoseconds spent performing 41 L2C hits;
    3214 nanoseconds spent performing 1 L2C misses;
    0 nanoseconds spent executing 0 flushes (flushing a total of 0 entities and 0 collections);
    0 nanoseconds spent executing 0 partial-flushes (flushing a total of 0 entities and 0 collections)
}
2016-04-24 17:03:16 INFO  [qtp603358340-29] StatisticalLoggingSessionEventListener: Session Metrics {
    116282684 nanoseconds spent acquiring 1 JDBC connections;
    0 nanoseconds spent releasing 0 JDBC connections;
    0 nanoseconds spent preparing 0 JDBC statements;
    0 nanoseconds spent executing 0 JDBC statements;
    0 nanoseconds spent executing 0 JDBC batches;
    0 nanoseconds spent performing 0 L2C puts;
    0 nanoseconds spent performing 0 L2C hits;
    0 nanoseconds spent performing 0 L2C misses;
    0 nanoseconds spent executing 0 flushes (flushing a total of 0 entities and 0 collections);
    0 nanoseconds spent executing 0 partial-flushes (flushing a total of 0 entities and 0 collections)
}

正如你所看到的l2缓存工作得很好，但是hibernate无论如何都会获得连接，这需要太长时间，因为DB很好......慢而且糟糕。不要考虑DB，只是告诉我，为什么在l2点击后，hibernate试图获取连接？有可能迫使他不要这样做吗？我的连接池也可能有问题吗？

为什么hibernate即使在l2缓存命中之后也会获得连接？

0 个答案: