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MySQL 8.0 Reference Manual  /  INFORMATION_SCHEMA Tables  /  The INFORMATION_SCHEMA PROFILING Table

24.18 The INFORMATION_SCHEMA PROFILING Table

The PROFILING table provides statement profiling information. Its contents correspond to the information produced by the SHOW PROFILE and SHOW PROFILES statements (see Section 13.7.6.30, “SHOW PROFILE Syntax”). The table is empty unless the profiling session variable is set to 1.

Note

This table is deprecated and will be removed in a future MySQL release. Use the Performance Schema instead; see Section 25.18.1, “Query Profiling Using Performance Schema”.

The SHOW Name values in the following table correspond to column names of the SHOW PROFILE statement.

INFORMATION_SCHEMA Name SHOW Name
QUERY_ID Query_ID
SEQ
STATE Status
DURATION Duration
CPU_USER CPU_user
CPU_SYSTEM CPU_system
CONTEXT_VOLUNTARY Context_voluntary
CONTEXT_INVOLUNTARY Context_involuntary
BLOCK_OPS_IN Block_ops_in
BLOCK_OPS_OUT Block_ops_out
MESSAGES_SENT Messages_sent
MESSAGES_RECEIVED Messages_received
PAGE_FAULTS_MAJOR Page_faults_major
PAGE_FAULTS_MINOR Page_faults_minor
SWAPS Swaps
SOURCE_FUNCTION Source_function
SOURCE_FILE Source_file
SOURCE_LINE Source_line

The PROFILING table has these columns:

  • QUERY_ID

    A numeric statement identifier.

  • SEQ

    A sequence number indicating the display order for rows with the same QUERY_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, and SOURCE_LINE

    Information indicating where in the source code the profiled state executes.

Notes

  • The PROFILING table is a nonstandard INFORMATION_SCHEMA table.

Profiling information is also available from the SHOW PROFILE and SHOW PROFILES statements. See Section 13.7.6.30, “SHOW PROFILE Syntax”. For example, the following queries are equivalent:

SHOW PROFILE FOR QUERY 2;

SELECT STATE, FORMAT(DURATION, 6) AS DURATION
FROM INFORMATION_SCHEMA.PROFILING
WHERE QUERY_ID = 2 ORDER BY SEQ;

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