Workloads with all dirty pages could trigger diagnostic stuck check

conn_config="cache_size=2GB,checkpoint=(wait=60)"

table_config="type=file,leaf_page_max=32k,leaf_value_max=128k,split_pct=90"

# The values are starting small, insert a lot so our database grows larger than

# cache quickly.

icount=20000000

report_interval=5

run_time=3000

populate_threads=1

# Continue inserting new records.

threads=((count=1,inserts=1,throttle=1000),(count=4,update=1,update_delta=100))

# Start with small values and let them grow slowly to large values.

value_sz=20

value_sz_max=65536