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MySQL 5.0 Reference Manual :: 19 INFORMATION_SCHEMA Tables :: 19.17 The INFORMATION_SCHEMA PROFILING Table
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19.17. The INFORMATION_SCHEMA PROFILING Table

This section does not apply to MySQL Enterprise Server users.

The PROFILING table provides statement profiling information. Its contents correspond to the information produced by the SHOW PROFILES and SHOW PROFILE statements (see Section 12.4.5.29, “SHOW PROFILES Syntax”). The table is empty unless the profiling session variable is set to 1.

INFORMATION_SCHEMA Name SHOW Name Remarks
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  

Notes:

  • The PROFILING table was added in MySQL 5.0.37.

  • QUERY_ID is a numeric statement identifier.

  • SEQ is a sequence number indicating the display order for rows with the same QUERY_ID value.

  • STATE is the profiling state to which the row measurements apply.

  • DURATION indicates how long statement execution remained in the given state, in seconds.

  • CPU_USER and CPU_SYSTEM indicate user and system CPU use, in seconds.

  • CONTEXT_VOLUNTARY and CONTEXT_INVOLUNTARY indicate how many voluntary and involuntary context switches occurred.

  • BLOCK_OPS_IN and BLOCK_OPS_OUT indicate the number of block input and output operations.

  • MESSAGES_SENT and MESSAGES_RECEIVED indicate the number of communication messages sent and received.

  • PAGE_FAULTS_MAJOR and PAGE_FAULTS_MINOR indicate the number of major and minor page faults.

  • SWAPS indicates how many swaps occurred.

  • SOURCE_FUNCTION, SOURCE_FILE, and SOURCE_LINE provide information indicating where in the source code the profiled state executes.