//like12 add,20150618,数据库命中率查询
@SuppressWarnings("rawtypes")
public String getOracleHitRate() {
StringBuilder sql = new StringBuilder(
" select ((1-(sum(decode(name, 'physical reads',value,0))/(sum(decode(name, 'db block gets',value,0)) "
+ " +sum(decode(name,'consistent gets',value,0))))) * 100) as Hit_Ratio "
+ " from v$sysstat "
);
List listTemp = this.getSession().createSQLQuery(sql.toString()).list();
String hitRate = listTemp.get(0).toString();
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return hitRate;
}