Oracle Database Discussions

hi,

I'm using Oracle version 19c. Could someone explain how the following metrics from autotrace are determined?

bytes sent via SQL*Net to client

bytes received via SQL*Net from client

For example, when I run the query below, it shows its respective autotrace stats.

SQL> set autotrace traceonly
SQL> select 1 from dual;


Execution Plan
----------------------------------------------------------
Plan hash value: 1388734953

-----------------------------------------------------------------
| Id  | Operation        | Name | Rows  | Cost (%CPU)| Time     |
-----------------------------------------------------------------
|   0 | SELECT STATEMENT |      |     1 |     2   (0)| 00:00:01 |
|   1 |  FAST DUAL       |      |     1 |     2   (0)| 00:00:01 |
-----------------------------------------------------------------


Statistics
----------------------------------------------------------
          0  recursive calls
          0  db block gets
          0  consistent gets
          0  physical reads
          0  redo size
        352  bytes sent via SQL*Net to client
        340  bytes received via SQL*Net from client
          2  SQL*Net roundtrips to/from client
          0  sorts (memory)
          0  sorts (disk)
          1  rows processed

SQL>

How did it come up with 352 and 340?

Thanks!