12c R2注意事项: mmon trace增长很快,3秒一次AUTO SGA: kmgs_parameter_update_timeout gen0 0 mmon alive 1
Oracle 12c很多情况下TRACE目录使用率增长迅速, 之前有总结过两篇异常情况,但是最近还是比较多,记录一下另一种情况。
Oracle12c R2注意事项: 因BUG生成大量的trace file 包含KRB: (rman module)
Oracle12c R2注意事项:ORA-12805问题
12C R2 new feature: 128 bytes for identifiers (表名长度可用128字节)
sys@pdborcl:orcl> CREATE table anbob_com_copyright_anbob_com_copyright_anbob_com_copyright_anbob_com_copyright_t(id int, col_name_col_name_col_name_col_name_col_name_col_name_col_name_col_name_col_name_largecolumn varchar2(5000));
Table created.
从12c r2 Release起表名和列名的长度限制为128 bytes.