v9.7 的页面清除 是怎么样的？

我在看深入解析db2 牛庄新写的

里面讲到 8.3.13 检查page cleaners是否足够

with db_snap as
(select
float(pool_drty_pg_steal_clns) as pg_steal,
float(pool_drty_pg_thrsh_clns) as chg_pg_thrsh,
float(pool_lsn_gap_clns) as softmax,
float(pool_drty_pg_steal_clns+ pool_drty_pg_thrsh_clns+ pool_lsn_gap_clns) as total_clns
from sysibmadm.snapdb)
select
dec((pg_steal/total_clns)*100,4,1) as "% steals",
dec((chg_pg_thrsh/total_clns)*100,4,1) as "%threshold",
dec((softmax/total_clns)*100,4,1) as "%softmax "
from db_snap;

这张表的数据都是0
对于db2_use_alternate_page_cleaning   偶也没有设置过，是默认的

是不是 9.7的算法 已经改变了？

谢谢解答 ，给个链接也行