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Spec-Zone .ru
спецификации, руководства, описания, API
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The PROFILING table
provides statement profiling information. Its contents correspond to the information produced by the SHOW PROFILES and SHOW PROFILE statements (see Section
13.7.5.30, "SHOW PROFILES Syntax"). The table is empty unless the profiling session variable is set to 1.
This table is deprecated as of MySQL 5.7.2 and will be removed in a future MySQL release. Use the Performance Schema instead; see Chapter 20, MySQL Performance Schema.
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:
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.