Huge Space Consumption by $ORACLE_HOME/.patch_storage

Hello All

When we applied Patchset 10.2.0.4 and some critical oracle patches, we got space problem on server.

We found large directories in solaris with command :du -ko /u0|sort -n | tail -10.

$ORACLE_HOME/.patch_storage was largest directory in oracle_home.

In .patch_storage is keeping your system up to date with Patchsets, Patch Bundles, Merge Label Requests (MLR) or Critical Patch Updates (CPU) for restore old versions.

for clearing this directory we can use MetaLink Note 550522.1
or simple: opatch util Cleanup