ESX 5.0 - Task virtual machine disks consolidation succeeded

If you have Veeam, vDR (VMware Data Recovery), or any other backup solution as mentioned above by @hanccocka, you more than likely have automated backup and/or replication jobs running. When they run, they create a snapshot of the VM that you're backing up or replicating. When the job is done, it will delete the snapshot file, which commits the data attained in the snap (delta) file to the parent virtual disk (or snap). Then, once all data is committed, the delta file (snap file) is deleted.

Regards,
~coolsport00

And how can I schedule the consolidation task?

Why do you need to Consolidate, you get a warning when you need to Consolidate, you can only Consolidate if you have leftover snapshots?

I dont wan't to consolidate, the problem is that the consolidation task run in a unexpected time and in some case have a impact in the performance of the VM.

The VM doesn't has snapshots open

Check the datastore.

Yes, I use trilead backup software