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MDEV-25325 built-in documentation for performance_schema tables

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Improve documentation of performance_schema tables by appending COLUMN
comments to tables. Additionally improve test coverage and update corresponding
tests.
This commit is contained in:
Haidong Ji
2021-05-02 15:43:04 -05:00
committed by Vicențiu Ciorbaru
parent edde990e35
commit 528abc749e
151 changed files with 3867 additions and 2377 deletions
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32
mysql-test/suite/perfschema/r/dml_fs_by_instance.result
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@ -23,3 +23,35 @@ UNLOCK TABLES;
LOCK TABLES performance_schema.file_summary_by_instance WRITE;
ERROR 42000: SELECT, LOCK TABLES command denied to user 'root'@'localhost' for table 'file_summary_by_instance'
UNLOCK TABLES;
#
# MDEV-25325 column_comment for performance_schema tables
#
select column_name, column_comment
from information_schema.columns
where table_schema='performance_schema' and table_name='file_summary_by_instance';
column_name column_comment
FILE_NAME File name.
EVENT_NAME Event name.
OBJECT_INSTANCE_BEGIN Address in memory. Together with FILE_NAME and EVENT_NAME uniquely identifies a row.
COUNT_STAR Number of summarized events
SUM_TIMER_WAIT Total wait time of the summarized events that are timed.
MIN_TIMER_WAIT Minimum wait time of the summarized events that are timed.
AVG_TIMER_WAIT Average wait time of the summarized events that are timed.
MAX_TIMER_WAIT Maximum wait time of the summarized events that are timed.
COUNT_READ Number of all read operations, including FGETS, FGETC, FREAD, and READ.
SUM_TIMER_READ Total wait time of all read operations that are timed.
MIN_TIMER_READ Minimum wait time of all read operations that are timed.
AVG_TIMER_READ Average wait time of all read operations that are timed.
MAX_TIMER_READ Maximum wait time of all read operations that are timed.
SUM_NUMBER_OF_BYTES_READ Bytes read by read operations.
COUNT_WRITE Number of all write operations, including FPUTS, FPUTC, FPRINTF, VFPRINTF, FWRITE, and PWRITE.
SUM_TIMER_WRITE Total wait time of all write operations that are timed.
MIN_TIMER_WRITE Minimum wait time of all write operations that are timed.
AVG_TIMER_WRITE Average wait time of all write operations that are timed.
MAX_TIMER_WRITE Maximum wait time of all write operations that are timed.
SUM_NUMBER_OF_BYTES_WRITE Bytes written by write operations.
COUNT_MISC Number of all miscellaneous operations not counted above, including CREATE, DELETE, OPEN, CLOSE, STREAM_OPEN, STREAM_CLOSE, SEEK, TELL, FLUSH, STAT, FSTAT, CHSIZE, RENAME, and SYNC.
SUM_TIMER_MISC Total wait time of all miscellaneous operations that are timed.
MIN_TIMER_MISC Minimum wait time of all miscellaneous operations that are timed.
AVG_TIMER_MISC Average wait time of all miscellaneous operations that are timed.
MAX_TIMER_MISC Maximum wait time of all miscellaneous operations that are timed.