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.
Figure 1 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