Performance Schema socket_summary_by_event_name Table
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It aggregates timer and byte count statistics for all socket I/O operations by socket instrument.
| Column | Description |
|---|---|
EVENT_NAME | Socket instrument. |
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 RECV, RECVFROM, and RECVMSG. |
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 SEND, SENDTO, and SENDMSG. |
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 CONNECT, LISTEN, ACCEPT, CLOSE, and SHUTDOWN. |
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. |
You can TRUNCATE the table, which will reset all counters to zero.
Example
SELECT * FROM socket_summary_by_event_name\G
*************************** 1. row ***************************
EVENT_NAME: wait/io/socket/sql/server_tcpip_socket
COUNT_STAR: 0
SUM_TIMER_WAIT: 0
MIN_TIMER_WAIT: 0
AVG_TIMER_WAIT: 0
MAX_TIMER_WAIT: 0
COUNT_READ: 0
SUM_TIMER_READ: 0
MIN_TIMER_READ: 0
AVG_TIMER_READ: 0
MAX_TIMER_READ: 0
SUM_NUMBER_OF_BYTES_READ: 0
COUNT_WRITE: 0
SUM_TIMER_WRITE: 0
MIN_TIMER_WRITE: 0
AVG_TIMER_WRITE: 0
MAX_TIMER_WRITE: 0
SUM_NUMBER_OF_BYTES_WRITE: 0
COUNT_MISC: 0
SUM_TIMER_MISC: 0
MIN_TIMER_MISC: 0
AVG_TIMER_MISC: 0
MAX_TIMER_MISC: 0
*************************** 2. row ***************************
EVENT_NAME: wait/io/socket/sql/server_unix_socket
COUNT_STAR: 0
SUM_TIMER_WAIT: 0
MIN_TIMER_WAIT: 0
AVG_TIMER_WAIT: 0
MAX_TIMER_WAIT: 0
COUNT_READ: 0
SUM_TIMER_READ: 0
MIN_TIMER_READ: 0
AVG_TIMER_READ: 0
MAX_TIMER_READ: 0
SUM_NUMBER_OF_BYTES_READ: 0
COUNT_WRITE: 0
SUM_TIMER_WRITE: 0
MIN_TIMER_WRITE: 0
AVG_TIMER_WRITE: 0
MAX_TIMER_WRITE: 0
SUM_NUMBER_OF_BYTES_WRITE: 0
COUNT_MISC: 0
SUM_TIMER_MISC: 0
MIN_TIMER_MISC: 0
AVG_TIMER_MISC: 0
MAX_TIMER_MISC: 0
...
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