Oracle 5.0 Reference Manual page 544

•
Com_stmt_prepare
•
Com_stmt_execute
•
Com_stmt_fetch
•
Com_stmt_send_long_data
•
Com_stmt_reset
•
Com_stmt_close
Those variables stand for prepared statement commands. Their names refer to the
command set used in the network layer. In other words, their values increase whenever prepared
statement API calls such as mysql_stmt_prepare(), mysql_stmt_execute(), and so forth
are executed. However, Com_stmt_prepare,
also increase for PREPARE, EXECUTE, or
values of the older statement counter variables Com_prepare_sql, Com_execute_sql, and
Com_dealloc_sql
stands for the total number of network round-trips issued when fetching from
Com_stmt_fetch
cursors.
• [524]
Compression
Whether the client connection uses compression in the client/server protocol. Added in MySQL
5.0.16.
• [524]
Connections
The number of connection attempts (successful or not) to the MySQL server.
•
Created_tmp_disk_tables
The number of internal on-disk temporary tables created by the server while executing statements.
If an internal temporary table is created initially as an in-memory table but becomes too large,
MySQL automatically converts it to an on-disk table. The maximum size for in-memory temporary
tables is the minimum of the
values. If
Created_tmp_disk_tables
[501]
tmp_table_size
internal temporary tables in memory will be converted to on-disk tables.
You can compare the number of internal on-disk temporary tables created to the
total number of internal temporary tables created by comparing the values of the
Created_tmp_disk_tables
See also Section 8.8.5, "How MySQL Uses Internal Temporary
•
Created_tmp_files
How many temporary files
•
Created_tmp_tables
The number of internal temporary tables created by the server while executing statements.
You can compare the number of internal on-disk temporary tables created to the
total number of internal temporary tables created by comparing the values of the
Created_tmp_disk_tables
See also Section 8.8.5, "How MySQL Uses Internal Temporary
Server Status Variables
DEALLOCATE
increase for the PREPARE, EXECUTE, and
[524]
tmp_table_size
[524]
or
max_heap_table_size
[524] and
Created_tmp_tables
[524]
has created.
mysqld
[524]
[524] and
Created_tmp_tables
524
Com_stmt_execute
PREPARE, respectively. Additionally, the
DEALLOCATE PREPARE
[501] and
max_heap_table_size
is large, you may want to increase the
[468] value to lessen the likelihood that
[524]
Tables".
[524]
Tables".
COM_xxx
and
Com_stmt_close
statements.
[468]
variables.
variables.