There have been some discussions on SERVER-31704 about adjusting the hash size. We should review these changes and conduct some perf tests.
Periodic drops in throughput during checkpoints while waiting on schema lock
Checkpoint schema lock can cause long stalls in command execution on systems with many active data handles
Slow queries every 80s under moderate load
Add new API allowing changing dhandle hash bucket size
PSMDB-587 Add options to control the size of several WiredTiger hash arrays concerned with data handles and one for session cursor cache