Javadoc
Obtain a new transaction to protect operations against the specified view
of the database. This uses the transaction mechanisms to prevent
recycling during operations NOT OTHERWISE PROTECTED by a
BigdataSailConnection for what would otherwise amount to dirty
reads. This is especially critical for reads on the global row store
since it can not be protected by the
BigdataSailConnection for
cases where the KB instance does not yet exist. The presence of such a tx
does NOT prevent concurrent commits. It only prevents recycling during
such commits (and even then only on the RWStore backend).