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MySQL 9.4 Reference Manual

ThePROFILING table provides statement profiling information. Its contents correspond to the information produced by theSHOW PROFILE andSHOW PROFILES statements (seeSection 15.7.7.33, “SHOW PROFILE Statement”). The table is empty unless theprofiling session variable is set to 1.

Note

This table is deprecated; expect it to be removed in a future MySQL release. Use thePerformance Schema instead; seeSection 29.19.1, “Query Profiling Using Performance Schema”.

ThePROFILING table has these columns:

QUERY_ID
A numeric statement identifier.
SEQ
A sequence number indicating the display order for rows with the sameQUERY_ID value.
STATE
The profiling state to which the row measurements apply.
DURATION
How long statement execution remained in the given state, in seconds.
CPU_USER,CPU_SYSTEM
User and system CPU use, in seconds.
CONTEXT_VOLUNTARY,CONTEXT_INVOLUNTARY
How many voluntary and involuntary context switches occurred.
BLOCK_OPS_IN,BLOCK_OPS_OUT
The number of block input and output operations.
MESSAGES_SENT,MESSAGES_RECEIVED
The number of communication messages sent and received.
PAGE_FAULTS_MAJOR,PAGE_FAULTS_MINOR
The number of major and minor page faults.
SWAPS
How many swaps occurred.
SOURCE_FUNCTION,SOURCE_FILE, andSOURCE_LINE
Information indicating where in the source code the profiled state executes.

Profiling information is also available from theSHOW PROFILE andSHOW PROFILES statements. SeeSection 15.7.7.33, “SHOW PROFILE Statement”. For example, the following queries are equivalent:

SHOW PROFILE FOR QUERY 2;SELECT STATE, FORMAT(DURATION, 6) AS DURATIONFROM INFORMATION_SCHEMA.PROFILINGWHERE QUERY_ID = 2 ORDER BY SEQ;