Oracle 5.0 Reference Manual page 471

If ON, the server flushes (synchronizes) all changes to disk after each SQL statement. Normally,
MySQL does a write of all changes to disk only after each SQL statement and lets the operating
system handle the synchronizing to disk. See
Crashing". This variable is set to
• [451]
flush_time
Command-Line Format
Option-File Format
Option Sets Variable
Variable Name
Variable Scope
Dynamic Variable
If this is set to a nonzero value, all tables are closed every
resources and synchronize unflushed data to disk. This option is best used only on systems with
minimal resources.
•
foreign_key_checks
If set to 1 (the default), foreign key constraints for
are ignored. Disabling foreign key checking can be useful for reloading
different from that required by their parent/child relationships. See
Constraints".
FOREIGN KEY
Setting
foreign_key_checks
drops a database even if it contains tables that have foreign keys that are referred to by
DATABASE
tables outside the database, and
to by other tables.
Note
Setting
of the existing table data. Therefore, rows added to the table while
foreign_key_checks = 0
•
ft_boolean_syntax
Command-Line Format
Option-File Format
Variable Name
Variable Scope
Dynamic Variable
Server System Variables
Type
boolean
Default
OFF
Section C.5.4.2, "What to Do If MySQL Keeps
if you start
ON mysqld
--flush_time=#
flush_time
Yes,
flush_time
flush_time
Global
Yes
Permitted Values
Type
numeric
Default
0
Min
0
Value
[451]
[451] to 0 also affects data definition statements:
DROP TABLE
foreign_key_checks
[451]
--ft_boolean_syntax=name
ft_boolean_syntax
ft_boolean_syntax
Global
Yes
Permitted Values
Type
string
451
with the
--flush
[451]
flush_time
tables are checked. If set to 0, they
InnoDB
Section 14.2.3.4,
drops tables that have foreign keys that are referred
[451] to 1 does not trigger a scan
[451] will not be verified for consistency.
[408] option.
[451] seconds to free up
tables in an order
InnoDB
"InnoDB and
DROP