您必须大致熟悉如何使用性能模式功能。例如，您应该知道如何启用监测点和使用者，以及如何查询 performance_schema 表以检索数据。有关介绍性概述，请参阅第 29.1 节“性能模式快速入门”。

您应该熟悉可用于 InnoDB 的性能模式监测点。要查看与 InnoDB 相关的监测点，您可以查询setup_instruments 表中名称包含“innodb”的监测点。

mysql> SELECT *
       FROM performance_schema.setup_instruments
       WHERE NAME LIKE '%innodb%';
+-------------------------------------------------------+---------+-------+
| NAME                                                  | ENABLED | TIMED |
+-------------------------------------------------------+---------+-------+
| wait/synch/mutex/innodb/commit_cond_mutex             | NO      | NO    |
| wait/synch/mutex/innodb/innobase_share_mutex          | NO      | NO    |
| wait/synch/mutex/innodb/autoinc_mutex                 | NO      | NO    |
| wait/synch/mutex/innodb/buf_pool_mutex                | NO      | NO    |
| wait/synch/mutex/innodb/buf_pool_zip_mutex            | NO      | NO    |
| wait/synch/mutex/innodb/cache_last_read_mutex         | NO      | NO    |
| wait/synch/mutex/innodb/dict_foreign_err_mutex        | NO      | NO    |
| wait/synch/mutex/innodb/dict_sys_mutex                | NO      | NO    |
| wait/synch/mutex/innodb/recalc_pool_mutex             | NO      | NO    |
...
| wait/io/file/innodb/innodb_data_file                  | YES     | YES   |
| wait/io/file/innodb/innodb_log_file                   | YES     | YES   |
| wait/io/file/innodb/innodb_temp_file                  | YES     | YES   |
| stage/innodb/alter table (end)                        | YES     | YES   |
| stage/innodb/alter table (flush)                      | YES     | YES   |
| stage/innodb/alter table (insert)                     | YES     | YES   |
| stage/innodb/alter table (log apply index)            | YES     | YES   |
| stage/innodb/alter table (log apply table)            | YES     | YES   |
| stage/innodb/alter table (merge sort)                 | YES     | YES   |
| stage/innodb/alter table (read PK and internal sort)  | YES     | YES   |
| stage/innodb/buffer pool load                         | YES     | YES   |
| memory/innodb/buf_buf_pool                            | NO      | NO    |
| memory/innodb/dict_stats_bg_recalc_pool_t             | NO      | NO    |
| memory/innodb/dict_stats_index_map_t                  | NO      | NO    |
| memory/innodb/dict_stats_n_diff_on_level              | NO      | NO    |
| memory/innodb/other                                   | NO      | NO    |
| memory/innodb/row_log_buf                             | NO      | NO    |
| memory/innodb/row_merge_sort                          | NO      | NO    |
| memory/innodb/std                                     | NO      | NO    |
| memory/innodb/sync_debug_latches                      | NO      | NO    |
| memory/innodb/trx_sys_t::rw_trx_ids                   | NO      | NO    |
...
+-------------------------------------------------------+---------+-------+
155 rows in set (0.00 sec)

有关已监测 InnoDB 对象的其他信息，您可以查询性能模式实例表，这些表提供了有关已监测对象的附加信息。与 InnoDB 相关的实例表包括：

例如，要查看性能模式在执行文件 I/O 监测时看到的已监测 InnoDB 文件对象的有关信息，您可以发出以下查询：

mysql> SELECT *
       FROM performance_schema.file_instances
       WHERE EVENT_NAME LIKE '%innodb%'\G
*************************** 1. row ***************************
 FILE_NAME: /home/dtprice/mysql-8.4/data/ibdata1
EVENT_NAME: wait/io/file/innodb/innodb_data_file
OPEN_COUNT: 3
*************************** 2. row ***************************
 FILE_NAME: /home/dtprice/mysql-8.4/data/#ib_16384_0.dblwr
EVENT_NAME: wait/io/file/innodb/innodb_dblwr_file
OPEN_COUNT: 2
*************************** 3. row ***************************
 FILE_NAME: /home/dtprice/mysql-8.4/data/#ib_16384_1.dblwr
EVENT_NAME: wait/io/file/mysql-8.4/innodb_dblwr_file
OPEN_COUNT: 2
...

您应该熟悉存储 InnoDB 事件数据的 performance_schema 表。与 InnoDB 相关事件相关的表包括：

如果您只对与 InnoDB 相关的对象感兴趣，请在查询这些表时使用子句 WHERE EVENT_NAME LIKE '%innodb%' 或 WHERE NAME LIKE '%innodb%'（根据需要）。