12c的GI中，/oracle_grid/app/oracle/crsdata/@global/cvu/baseline/cvures这个目录下的文件占用空间巨大。某生产环境中，目录已经到了32G以上。

这可能和如下3个bug有关：

Unpublished Bug 18143707 CVU NEED TO DO CVU BASELINE REPORT CLEAN TO AVOID DISK FULL  will limit .txt files to 5
Unpublished Bug 19703199 CVU NEED TO DO CVU BASELINE REPORT CLEAN TO AVOID DISK FULL  will limit .xml files to 5
Unpublished Bug 20177779 BIGBH U01 SPACE CONSUMPTION BY CVUCHECKREPORT.XML will purge the files on remote nodes

解决方案：

Bug 18143707 is fixed in 12.1.0.2
Bug 19703199 is fixed in 12.1.0.2.4 PSU
Bug 20177779 is fixed in 12.1.0.2.5 PSU
The workaround is to remove these reports manually.

参考：
Doc ID 1964482.1
Doc ID 2054765.1