Monitoring latches with onstat -p Run onstat -p to obtain the values in the lchwaits field. This field stores the number of times that a thread was required to wait for a shared-memory latch. Partial onstat -p output showing the lchwaits field shows an excerpt of sample onstat -p output that shows the lchwaits field. Figure 1: Partial onstat -p output showing the lchwaits field ... ixda-RA idx-RA da-RA logrec-RA RA-pgsused lchwaits 5 0 204 0 148 12