It it safe to delete pgdata-9.3.old after OPDK upgrade?

After an upgrade from OPDK 4.16.01 to 14.17.05. In the directory /opt/apigee/data/apigee-postgres, there are two directories, pgdata and pgdata-9.3.old. I believe the pgdata-9.3.old was a backup creted during the upgrade.


Is is safe to delete the pgdata-9.3.old directory to free up disk space? Are there any data reference to it form the new version of postgres (9.4)?

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The file can be deleted if the upgrade is verified and confirmed to be successful.