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oracle 官方给的说法是 C.3.152 SQL*Net more data to client The server process is sending more data/messages to the client. The previous operation to the clien 阅读全文
摘要:
SQL> set linesize 10000; SQL> set pagesize 10000; SQL> explain plan for select * from dual; Explained. 之后使用dbms_xplan工具包将生成的执行计划展示出来。 SQL> select * fr 阅读全文
摘要:
ORALCE的等待事件有很多,今天在一个数据库的awr报告中发现了一个新的等待事件:Disk file operations I/O,官方解释如下: This event is used to wait for disk file operations (for example, open, clo 阅读全文