sga_target设置大于100G遇到的一个bug ORA-00064: object is too large

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主机内存256G，sga_target准备设置为160G，DBCA创建数据库时一直报错ORA-00064: object is too large to allocate on this O/S (1,15429280)

直接使用DBCA默认参数把库建好后，再次使用命令来修改，报错依旧。经查，参考文档Database startup can fail with ORA-00064 Errors with huge sga_target of over 40Gig (文档 ID 886312.1)，也就是与SGA Granule Size相关，设置_ksmg_granule_size=33554432解决此问题。

文档部分内容：

CAUSE

SOLUTION

1. set SGA_TARGET to a value less than or equal to the previous one, or:
2. set _ksmg_granule_size to a higher value (in this case the value was set to 32MB). When using a text parameter file, add the following parameter:
   
   _ksmg_granule_size=33554432
   
   When using a server parameter file, issue:
   
   alter system set "_ksmg_granule_size"=33554432 scope=spfile;
   
   In either case, restart the instance for the changes to take effect.

sga_target设置大于100G遇到的一个bug ORA-00064: object is too large

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原文地址：http://blog.csdn.net/haibusuanyun/article/details/42294875