Oracle 5.0 Reference Manual page 1268

Variable Name
Variable Scope
Dynamic Variable
The number of log files in the log group.
(and recommended) value is 2.
•
innodb_log_group_home_dir
Command-Line Format
Option-File Format
Option Sets Variable
Variable Name
Variable Scope
Dynamic Variable
The directory path to the
is to create two files named
size is given by the size of the
•
innodb_max_dirty_pages_pct
Command-Line Format
Option-File Format
Option Sets Variable
Variable Name
Variable Scope
Dynamic Variable
This is an integer in the range from 0 to 100. The default value is 90. The main thread in
tries to write pages from the buffer pool so that the percentage of dirty (not yet written) pages will not
exceed this value.
•
innodb_max_purge_lag
Command-Line Format
Option-File Format
Option Sets Variable
Variable Name
Startup Options and System Variables
InnoDB
innodb_log_files_in_group
Global
No
Permitted Values
Type
numeric
Default
2
Range
2 .. 100
InnoDB
--innodb_log_group_home_dir=path
innodb_log_group_home_dir
Yes,
innodb_log_group_home_dir
innodb_log_group_home_dir
Global
No
Permitted Values
Type
file name
log files. If you do not specify any
InnoDB
ib_logfile0
innodb_log_file_size
--innodb_max_dirty_pages_pct=#
innodb_max_dirty_pages_pct
Yes,
innodb_max_dirty_pages_pct
innodb_max_dirty_pages_pct
Global
Yes
Permitted Values
Type
numeric
Default
90
Range
0 .. 100
--innodb_max_purge_lag=#
innodb_max_purge_lag
Yes,
innodb_max_purge_lag
innodb_max_purge_lag
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writes to the files in a circular fashion. The default
and in the MySQL data directory. Their
ib_logfile1
[1247] system variable.
[1248]
[1248]
log variables, the default
InnoDB
[1248]
InnoDB