Running reorg rebuild Concurrently

The reorg rebuild command includes an online parameter that lets you reorganize data and perform maintenance without taking the data offline.

For example, to rebuild the indexes on the titles table and keep the data online, enter:
reorg rebuild titles with online
reorg rebuild ... online includes three phases:

SAP ASE recommends that you run reorg rebuild when the table’s transaction load is relatively low.

Running reorg rebuild ... online takes place in a single transaction. Recovering the work performed by the online parameter is similar to recovering the work performed without the online parameter. Consider these issues when rolling back work performed with the online parameter:
reorg rebuild ... online includes these restrictions: