Hello,
check any memory and CPU resource for the same.
check the channel allocation and fileperset etc values to be set to speed the process.. in file "init<SID>.sap".
check SGA and PGA ,large pool size... and tune if required.
check the network area with storage team as well.
cross check the QUA DB size which might be copy fo PRD recently and size might be increased.
Thanks,
Brindavan