（3）MAXLOGFILE and MAXLOGMEMBERS
The MAXLOGFILES optionof CREATE DATABASE specifies the maximum number of redo log groups that can becreated for the database. The MAXLOGMEMBERS option specifies the maximum numberof members or number of copies per group. Set MAXLOGFILES to the maximum numberof instances you plan to run concurrently multiplied by the maximum anticipatednumber of groups per thread.
The MAXLOGHISTORY optionof CREATE DATABASE specifies the maximum number of redolog files that can be recorded in the log history of the control file.The log history is used for automatic media recovery of Oracle Real ApplicationClusters.
ForOracle Real Application Clusters, set MAXLOGHISTORY to a large value, such as100. The control file can then store information about this number ofredo log files. When the log history exceeds this limit, the Oracle serveroverwrites the oldest entries in the log history. Thedefault for MAXLOGHISTORY is 0 (zero), which disables log history.
这4个参数中，我们在创建DB 时需要注意的是MAXDATAFILES 和MAXLOGHISTORY。 因为默认值较小。 在创建DB 时就需要把这2个参数设置成较大值。
比如MAXDATAFILES 设置成8k，MAXLOGHISTORY 设置成1k。
与这几个参数相关的错误：
ORA-01164: MAXLOGFILES may not exceed string
Cause: MAXLOGFILES specified on the command line too large.
Action: Resubmit the command with a smaller MAXLOGFILES
ORA-01165:MAXDATAFILES may not exceed string
Cause: MAXDATAFILES specified on the command line too large.
Action: Resubmit the command with a smaller MAXDATAFILES
ORA-01166:file number string is larger than string (string)
Cause: File mentioned in CREATE CONTROLFILE has a file number whichis larger than that specified for MAXDATAFILES or MAXLOGFILES.
Action: Increase the maximum specified on the command line.