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Update README for all recent changes
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‎README.md‎

Lines changed: 73 additions & 63 deletions
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@@ -897,26 +897,26 @@ When the user found is NULL, it is assumed to be a "background" thread.
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```SQL
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mysql> select * from user_summary_by_stages;
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+------+--------------------------------+-------+-----------+-----------+
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| user | event_name | total | wait_sum | wait_avg |
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+------+--------------------------------+-------+-----------+-----------+
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| root | stage/sql/Opening tables | 889 | 1.97 ms | 2.22 us |
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| root | stage/sql/Creating sort index | 4 | 1.79 ms | 446.30 us |
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| root | stage/sql/init | 10 | 312.27 us | 31.23 us |
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| root | stage/sql/checking permissions | 10 | 300.62 us | 30.06 us |
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| root | stage/sql/freeing items | 5 | 85.89 us | 17.18 us |
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| root | stage/sql/statistics | 5 | 79.15 us | 15.83 us |
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| root | stage/sql/preparing | 5 | 69.12 us | 13.82 us |
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| root | stage/sql/optimizing | 5 | 53.11 us | 10.62 us |
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| root | stage/sql/Sending data | 5 | 44.66 us | 8.93 us |
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| root | stage/sql/closing tables | 5 | 37.54 us | 7.51 us |
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| root | stage/sql/System lock | 5 | 34.28 us | 6.86 us |
914-
| root | stage/sql/query end | 5 | 24.37 us | 4.87 us |
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| root | stage/sql/end | 5 | 8.60 us | 1.72 us |
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| root | stage/sql/Sorting result | 5 | 8.33 us | 1.67 us |
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| root | stage/sql/executing | 5 | 5.37 us | 1.07 us |
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| root | stage/sql/cleaning up | 5 | 4.60 us | 919.00 ns |
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+------+--------------------------------+-------+-----------+-----------+
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+------+--------------------------------+-------+---------------+-------------+
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| user | event_name | total | total_latency | avg_latency |
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+------+--------------------------------+-------+---------------+-------------+
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| root | stage/sql/Opening tables | 889 | 1.97 ms | 2.22 us |
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| root | stage/sql/Creating sort index | 4 | 1.79 ms | 446.30 us |
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| root | stage/sql/init | 10 | 312.27 us | 31.23 us |
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| root | stage/sql/checking permissions | 10 | 300.62 us | 30.06 us |
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| root | stage/sql/freeing items | 5 | 85.89 us | 17.18 us |
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| root | stage/sql/statistics | 5 | 79.15 us | 15.83 us |
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| root | stage/sql/preparing | 5 | 69.12 us | 13.82 us |
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| root | stage/sql/optimizing | 5 | 53.11 us | 10.62 us |
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| root | stage/sql/Sending data | 5 | 44.66 us | 8.93 us |
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| root | stage/sql/closing tables | 5 | 37.54 us | 7.51 us |
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| root | stage/sql/System lock | 5 | 34.28 us | 6.86 us |
914+
| root | stage/sql/query end | 5 | 24.37 us | 4.87 us |
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| root | stage/sql/end | 5 | 8.60 us | 1.72 us |
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| root | stage/sql/Sorting result | 5 | 8.33 us | 1.67 us |
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| root | stage/sql/executing | 5 | 5.37 us | 1.07 us |
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| root | stage/sql/cleaning up | 5 | 4.60 us | 919.00 ns |
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+------+--------------------------------+-------+---------------+-------------+
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```
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#### user_summary_by_statement_latency / x$user_summary_by_statement_latency
@@ -979,6 +979,8 @@ mysql> select * from user_summary_by_statement_type;
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Summarizes statement activity, file IO and connections by host.
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When the host found is NULL, it is assumed to be a "background" thread.
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##### Example
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```SQL
@@ -997,6 +999,8 @@ Summarizes statement activity, file IO and connections by host.
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Summarizes file IO totals per host.
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When the host found is NULL, it is assumed to be a "background" thread.
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##### Example
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```SQL
@@ -1015,31 +1019,33 @@ Summarizes file IO totals per host.
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Summarizes file IO by event type per host.
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When the host found is NULL, it is assumed to be a "background" thread.
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##### Example
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```SQL
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mysql> select * from host_summary_by_file_io_type;
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+------------+--------------------------------------+-------+-----------+-------------+
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| host | event_name | total | latency | max_latency |
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+------------+--------------------------------------+-------+-----------+-------------+
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| hal1 | wait/io/file/sql/FRM | 871 | 168.15 ms | 18.48 ms |
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| hal1 | wait/io/file/innodb/innodb_data_file | 173 | 129.56 ms | 34.09 ms |
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| hal1 | wait/io/file/innodb/innodb_log_file | 20 | 77.53 ms | 60.66 ms |
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| hal1 | wait/io/file/myisam/dfile | 40 | 6.54 ms | 4.58 ms |
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| hal1 | wait/io/file/mysys/charset | 3 | 4.79 ms | 4.71 ms |
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| hal1 | wait/io/file/myisam/kfile | 67 | 4.38 ms | 300.04 us |
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| hal1 | wait/io/file/sql/ERRMSG | 5 | 2.72 ms | 1.69 ms |
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| hal1 | wait/io/file/sql/pid | 3 | 266.30 us | 185.47 us |
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| hal1 | wait/io/file/sql/casetest | 5 | 246.81 us | 150.19 us |
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| hal1 | wait/io/file/sql/global_ddl_log | 2 | 21.24 us | 18.59 us |
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| hal2 | wait/io/file/sql/file_parser | 1422 | 4.80 s | 135.14 ms |
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| hal2 | wait/io/file/sql/FRM | 865 | 85.82 ms | 9.81 ms |
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| hal2 | wait/io/file/myisam/kfile | 1073 | 37.14 ms | 15.79 ms |
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| hal2 | wait/io/file/myisam/dfile | 2991 | 25.53 ms | 5.25 ms |
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| hal2 | wait/io/file/sql/dbopt | 20 | 1.07 ms | 153.07 us |
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| hal2 | wait/io/file/sql/misc | 4 | 59.71 us | 33.75 us |
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| hal2 | wait/io/file/archive/data | 1 | 13.91 us | 13.91 us |
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+------------+--------------------------------------+-------+-----------+-------------+
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+------------+--------------------------------------+-------+---------------+-------------+
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| host | event_name | total | total_latency | max_latency |
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+------------+--------------------------------------+-------+---------------+-------------+
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| hal1 | wait/io/file/sql/FRM | 871 | 168.15 ms | 18.48 ms |
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| hal1 | wait/io/file/innodb/innodb_data_file | 173 | 129.56 ms | 34.09 ms |
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| hal1 | wait/io/file/innodb/innodb_log_file | 20 | 77.53 ms | 60.66 ms |
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| hal1 | wait/io/file/myisam/dfile | 40 | 6.54 ms | 4.58 ms |
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| hal1 | wait/io/file/mysys/charset | 3 | 4.79 ms | 4.71 ms |
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| hal1 | wait/io/file/myisam/kfile | 67 | 4.38 ms | 300.04 us |
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| hal1 | wait/io/file/sql/ERRMSG | 5 | 2.72 ms | 1.69 ms |
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| hal1 | wait/io/file/sql/pid | 3 | 266.30 us | 185.47 us |
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| hal1 | wait/io/file/sql/casetest | 5 | 246.81 us | 150.19 us |
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| hal1 | wait/io/file/sql/global_ddl_log | 2 | 21.24 us | 18.59 us |
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| hal2 | wait/io/file/sql/file_parser | 1422 | 4.80 s | 135.14 ms |
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| hal2 | wait/io/file/sql/FRM | 865 | 85.82 ms | 9.81 ms |
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| hal2 | wait/io/file/myisam/kfile | 1073 | 37.14 ms | 15.79 ms |
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| hal2 | wait/io/file/myisam/dfile | 2991 | 25.53 ms | 5.25 ms |
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| hal2 | wait/io/file/sql/dbopt | 20 | 1.07 ms | 153.07 us |
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| hal2 | wait/io/file/sql/misc | 4 | 59.71 us | 33.75 us |
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| hal2 | wait/io/file/archive/data | 1 | 13.91 us | 13.91 us |
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+------------+--------------------------------------+-------+---------------+-------------+
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```
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#### host_summary_by_stages / x$host_summary_by_stages
@@ -1048,30 +1054,32 @@ Summarizes file IO by event type per host.
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Summarizes stages by host, ordered by host and total latency per stage.
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When the host found is NULL, it is assumed to be a "background" thread.
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##### Example
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```SQL
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mysql> select * from host_summary_by_stages;
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+------+--------------------------------+-------+-----------+-----------+
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| host | event_name | total | wait_sum | wait_avg |
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+------+--------------------------------+-------+-----------+-----------+
1058-
| hal | stage/sql/Opening tables | 889 | 1.97 ms | 2.22 us |
1059-
| hal | stage/sql/Creating sort index | 4 | 1.79 ms | 446.30 us |
1060-
| hal | stage/sql/init | 10 | 312.27 us | 31.23 us |
1061-
| hal | stage/sql/checking permissions | 10 | 300.62 us | 30.06 us |
1062-
| hal | stage/sql/freeing items | 5 | 85.89 us | 17.18 us |
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| hal | stage/sql/statistics | 5 | 79.15 us | 15.83 us |
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| hal | stage/sql/preparing | 5 | 69.12 us | 13.82 us |
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| hal | stage/sql/optimizing | 5 | 53.11 us | 10.62 us |
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| hal | stage/sql/Sending data | 5 | 44.66 us | 8.93 us |
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| hal | stage/sql/closing tables | 5 | 37.54 us | 7.51 us |
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| hal | stage/sql/System lock | 5 | 34.28 us | 6.86 us |
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| hal | stage/sql/query end | 5 | 24.37 us | 4.87 us |
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| hal | stage/sql/end | 5 | 8.60 us | 1.72 us |
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| hal | stage/sql/Sorting result | 5 | 8.33 us | 1.67 us |
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| hal | stage/sql/executing | 5 | 5.37 us | 1.07 us |
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| hal | stage/sql/cleaning up | 5 | 4.60 us | 919.00 ns |
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+------+--------------------------------+-------+-----------+-----------+
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+------+--------------------------------+-------+---------------+-------------+
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| host | event_name | total | total_latency | avg_latency |
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+------+--------------------------------+-------+---------------+-------------+
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| hal | stage/sql/Opening tables | 889 | 1.97 ms | 2.22 us |
1067+
| hal | stage/sql/Creating sort index | 4 | 1.79 ms | 446.30 us |
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| hal | stage/sql/init | 10 | 312.27 us | 31.23 us |
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| hal | stage/sql/checking permissions | 10 | 300.62 us | 30.06 us |
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| hal | stage/sql/freeing items | 5 | 85.89 us | 17.18 us |
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| hal | stage/sql/statistics | 5 | 79.15 us | 15.83 us |
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| hal | stage/sql/preparing | 5 | 69.12 us | 13.82 us |
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| hal | stage/sql/optimizing | 5 | 53.11 us | 10.62 us |
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| hal | stage/sql/Sending data | 5 | 44.66 us | 8.93 us |
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| hal | stage/sql/closing tables | 5 | 37.54 us | 7.51 us |
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| hal | stage/sql/System lock | 5 | 34.28 us | 6.86 us |
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| hal | stage/sql/query end | 5 | 24.37 us | 4.87 us |
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| hal | stage/sql/end | 5 | 8.60 us | 1.72 us |
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| hal | stage/sql/Sorting result | 5 | 8.33 us | 1.67 us |
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| hal | stage/sql/executing | 5 | 5.37 us | 1.07 us |
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| hal | stage/sql/cleaning up | 5 | 4.60 us | 919.00 ns |
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+------+--------------------------------+-------+---------------+-------------+
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```
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#### host_summary_by_statement_latency / x$host_summary_by_statement_latency
@@ -1080,6 +1088,8 @@ Summarizes stages by host, ordered by host and total latency per stage.
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Summarizes overall statement statistics by host.
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When the host found is NULL, it is assumed to be a "background" thread.
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##### Example
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```SQL
@@ -1097,6 +1107,8 @@ mysql> select * from host_summary_by_statement_latency;
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Summarizes the types of statements executed by each host.
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When the host found is NULL, it is assumed to be a "background" thread.
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##### Example
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```SQL
@@ -1111,10 +1123,8 @@ Summarizes the types of statements executed by each host.
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| hal | create_table | 19 | 3.04 s | 431.71 ms | 0 ps | 0 | 0 | 0 | 0 |
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...
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+------+----------------------+--------+---------------+-------------+--------------+-----------+---------------+---------------+------------+
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```
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#### wait_classes_global_by_avg_latency / x$wait_classes_global_by_avg_latency
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##### Description

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