mysql 日志理解

2019-08-24T23:47:23.362286+08:00 0 [Note] InnoDB: page_cleaner: 1000ms intended loop took 6151ms. The settings might not be optimal. (flushed=215 and evicted=0, during the time.)

后半部分(flushed=182 and evicted=0, during the time.)日志，对应n_flushed_last和n_evicted两个变量，这两个变量来自于下面2个变量。

 n_evicted += n_flushed_lru;
n_flushed_last += n_flushed_list;
从源码注释中可以看出，n_flushed_lru表示从LRU list尾部刷新的页数，也就是日志中如evicted=0指标的所表示的值。
n_flushed_list：这个是从flush_list刷新列表中刷新的页数，也就是脏页数，日志中flushed=182的值。

/**
Wait until all flush requests are finished.
@param n_flushed_lru    number of pages flushed from the end of the LRU list.
@param n_flushed_list    number of pages flushed from the end of the flush_list.
@return            true if all flush_list flushing batch were success. */

static
bool
pc_wait_finished(
    ulint*    n_flushed_lru,
    ulint*    n_flushed_list)