Performance Schema socket_instances Table
The socket_instances table lists active server connections, with each record being a Unix socket file or TCP/IP connection.
The socket_instances table contains the following columns:
| Column | Description |
|---|---|
EVENT_NAME | NAME from the setup_instruments table, and the name of the wait/io/socket/* instrument that produced the event. |
OBJECT_INSTANCE_BEGIN | Memory address of the object. |
THREAD_ID | Thread identifier that the server assigns to each socket. |
SOCKET_ID | The socket's internal file handle. |
IP | Client IP address. Blank for Unix socket file, otherwise an IPv4 or IPv6 address. Together with the PORT identifies the connection. |
PORT | TCP/IP port number, from 0 to 65535. Together with the IP identifies the connection. |
STATE | Socket status, either IDLE if waiting to receive a request from a client, or ACTIVE |
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