檢查命中率
select a.value + b.value "logical_reads", c.value "physical_reads",
round(100 * ((a.value+b.value)-c.value)/(a.value+b.value)) "BUFFER HIT RATIO"
from v$sysstat a,v$sysstat b,v$sysstat c
where a.statistic# =47 and b.statistic# =50 and c.statistic#=54;
round(100 * ((a.value+b.value)-c.value)/(a.value+b.value)) "BUFFER HIT RATIO"
from v$sysstat a,v$sysstat b,v$sysstat c
where a.statistic# =47 and b.statistic# =50 and c.statistic#=54;
来自 “ ITPUB博客 ” ，链接：https://blog.itpub.net/25198367/viewspace-704250/ ，如需转载，请注明出处，否则将追究法律责任。
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