oracle解析相关的等待事件(Shared Pool latch/library cache: mutex X/cursor: pin S)
SharedPool/LibraryCacheLatchContention可能的原因sql语句不能被重用,语句没有使用绑定变量,不合适的应用游标缓存大小,频繁的登入或登出,数据库对象上做过ddl操作,共享池太小等在会话级别V$SESSTATparsetimeCPUparsetimeelapsedRatioofparsecount(hard)/executecountRatioofparsecou