Insert 语句对 nologging 与 logging表 在不同场景下的优化
前言
前段时间报表数据库上有条insert sql语句，插入的大量数据，执行非常慢，需要对其进行分析优化。
分析步骤是在：ARCHIVE与NOARCHIVE模式下进行。
测试场景: 分别对表的常规插入，表在append插入，表在append + parallel插入进行性能测试，得出结果。
环境准备
| 数据库版本 | 基础表 | nologging表 | logging表 |
|---|---|---|---|
| Oracle 11g | T1 | T2 | T3 |
#创建T1,T2,T3表
create table t1 as select * from dba_objects;
create table t2 as select * from dba_objects where 1=2;
create table t3 as select * from dba_objects where 1=2;
#往T1表插入数据
SQL> insert into t1 select * from t1;
72813 rows created.
SQL> /
145626 rows created.
SQL> /
291252 rows created.
SQL> select count(*) from t1;
COUNT(*)
----------
582504
#设置T2表为nologging属性
SQL> alter table t2 nologging;
Table altered.数据库处于ARCHIVE时
常规插入
nologging 表T2
SQL> insert into t2 select * from t1;
commit;
582824 rows created.
Execution Plan
----------------------------------------------------------
Plan hash value: 3617692013
---------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
---------------------------------------------------------------------------------
| 0 | INSERT STATEMENT | | 582K| 53M| 1455 (2)| 00:00:18 |
| 1 | LOAD TABLE CONVENTIONAL | T2 | | | | |
| 2 | TABLE ACCESS FULL | T1 | 582K| 53M| 1455 (2)| 00:00:18 |
---------------------------------------------------------------------------------
Statistics
----------------------------------------------------------
3345 recursive calls
46879 db block gets
27878 consistent gets
8269 physical reads
67752144 redo size
838 bytes sent via SQL*Net to client
784 bytes received via SQL*Net from client
3 SQL*Net roundtrips to/from client
3 sorts (memory)
0 sorts (disk)
582824 rows processed
SQL>
Commit complete. 耗费：67752144 redo size
logging 表T3
SQL> insert into t3 select * from t1;
commit;
582824 rows created.
Execution Plan
----------------------------------------------------------
Plan hash value: 3617692013
---------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
---------------------------------------------------------------------------------
| 0 | INSERT STATEMENT | | 582K| 53M| 1455 (2)| 00:00:18 |
| 1 | LOAD TABLE CONVENTIONAL | T3 | | | | |
| 2 | TABLE ACCESS FULL | T1 | 582K| 53M| 1455 (2)| 00:00:18 |
---------------------------------------------------------------------------------
Statistics
----------------------------------------------------------
2860 recursive calls
46875 db block gets
27811 consistent gets
1 physical reads
67875992 redo size
829 bytes sent via SQL*Net to client
784 bytes received via SQL*Net from client
3 SQL*Net roundtrips to/from client
1 sorts (memory)
0 sorts (disk)
582824 rows processed
SQL>
Commit complete.耗费：67875992 redo size
append 插入
nologging 表T2
SQL> insert /*+ append */ into t2 select * from t1;
commit;
582824 rows created.
Execution Plan
----------------------------------------------------------
ERROR:
ORA-12838: cannot read/modify an object after modifying it in parallel
SP2-0612: Error generating AUTOTRACE EXPLAIN report
Statistics
----------------------------------------------------------
2627 recursive calls
9324 db block gets
8832 consistent gets
0 physical reads
143436 redo size
824 bytes sent via SQL*Net to client
798 bytes received via SQL*Net from client
3 SQL*Net roundtrips to/from client
1 sorts (memory)
0 sorts (disk)
582824 rows processed耗费：143436 redo size
logging 表T3
SQL> insert /*+ append */ into t3 select * from t1;
582824 rows created.
Execution Plan
----------------------------------------------------------
ERROR:
ORA-12838: cannot read/modify an object after modifying it in parallel
SP2-0612: Error generating AUTOTRACE EXPLAIN report
Statistics
----------------------------------------------------------
2627 recursive calls
9327 db block gets
8832 consistent gets
0 physical reads
68384900 redo size
822 bytes sent via SQL*Net to client
797 bytes received via SQL*Net from client
3 SQL*Net roundtrips to/from client
1 sorts (memory)
0 sorts (disk)
582824 rows processed耗费：68384900 redo size
parallel + append 插入
nologging 表T2
SQL> alter session enable parallel dml;
insert /*+ append parallel(2) */ into t2 select * from t1;
commit;
Session altered.
SQL>
582824 rows created.
Execution Plan
----------------------------------------------------------
ERROR:
ORA-12838: cannot read/modify an object after modifying it in parallel
SP2-0612: Error generating AUTOTRACE EXPLAIN report
Statistics
----------------------------------------------------------
52 recursive calls
32 db block gets
19 consistent gets
0 physical reads
21916 redo size
824 bytes sent via SQL*Net to client
809 bytes received via SQL*Net from client
3 SQL*Net roundtrips to/from client
1 sorts (memory)
0 sorts (disk)
582824 rows processed耗费：21916 redo size
logging 表T3
SQL> alter session enable parallel dml;
insert /*+ append parallel(2)*/ into t3 select * from t1;
commit;
Session altered.
SQL>
582824 rows created.
Execution Plan
----------------------------------------------------------
ERROR:
ORA-12838: cannot read/modify an object after modifying it in parallel
SP2-0612: Error generating AUTOTRACE EXPLAIN report
Statistics
----------------------------------------------------------
50 recursive calls
33 db block gets
20 consistent gets
0 physical reads
21308 redo size
824 bytes sent via SQL*Net to client
808 bytes received via SQL*Net from client
3 SQL*Net roundtrips to/from client
1 sorts (memory)
0 sorts (disk)
582824 rows processed耗费：21308 redo size
数据库处于NOARCHIVE时
常规插入
nologging 表T2
Execution Plan
----------------------------------------------------------
Plan hash value: 3617692013
---------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
---------------------------------------------------------------------------------
| 0 | INSERT STATEMENT | | 582K| 53M| 1455 (2)| 00:00:18 |
| 1 | LOAD TABLE CONVENTIONAL | T2 | | | | |
| 2 | TABLE ACCESS FULL | T1 | 582K| 53M| 1455 (2)| 00:00:18 |
---------------------------------------------------------------------------------
Statistics
----------------------------------------------------------
2538 recursive calls
46869 db block gets
27796 consistent gets
8266 physical reads
67754744 redo size
824 bytes sent via SQL*Net to client
784 bytes received via SQL*Net from client
3 SQL*Net roundtrips to/from client
1 sorts (memory)
0 sorts (disk)
582824 rows processed耗费：67754744 redo size
logging 表T3
Execution Plan
----------------------------------------------------------
Plan hash value: 3617692013
---------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
---------------------------------------------------------------------------------
| 0 | INSERT STATEMENT | | 582K| 53M| 1455 (2)| 00:00:18 |
| 1 | LOAD TABLE CONVENTIONAL | T3 | | | | |
| 2 | TABLE ACCESS FULL | T1 | 582K| 53M| 1455 (2)| 00:00:18 |
---------------------------------------------------------------------------------
Statistics
----------------------------------------------------------
2593 recursive calls
46873 db block gets
27800 consistent gets
1600 physical reads
67757328 redo size
824 bytes sent via SQL*Net to client
784 bytes received via SQL*Net from client
3 SQL*Net roundtrips to/from client
3 sorts (memory)
0 sorts (disk)
582824 rows processed耗费：67757328 redo size
append 插入
nologging 表T2
Statistics
----------------------------------------------------------
2627 recursive calls
9324 db block gets
8832 consistent gets
2993 physical reads
143480 redo size
822 bytes sent via SQL*Net to client
798 bytes received via SQL*Net from client
3 SQL*Net roundtrips to/from client
1 sorts (memory)
0 sorts (disk)
582824 rows processed耗费：143480 redo size
logging 表T3
Statistics
----------------------------------------------------------
2627 recursive calls
9327 db block gets
8832 consistent gets
0 physical reads
143420 redo size
821 bytes sent via SQL*Net to client
798 bytes received via SQL*Net from client
3 SQL*Net roundtrips to/from client
1 sorts (memory)
0 sorts (disk)
582824 rows processed耗费：143420 redo size
parallel + append 插入
nologging 表T2
Statistics
----------------------------------------------------------
50 recursive calls
32 db block gets
21 consistent gets
0 physical reads
21896 redo size
823 bytes sent via SQL*Net to client
810 bytes received via SQL*Net from client
3 SQL*Net roundtrips to/from client
1 sorts (memory)
0 sorts (disk)
582824 rows processed耗费：21896 redo size
logging 表T3
Statistics
----------------------------------------------------------
50 recursive calls
33 db block gets
20 consistent gets
0 physical reads
21896 redo size
821 bytes sent via SQL*Net to client
809 bytes received via SQL*Net from client
3 SQL*Net roundtrips to/from client
1 sorts (memory)
0 sorts (disk)
582824 rows processed耗费：21896 redo size
综合比较
| 属性 | 表名 | 常规插入产生的redo size | apppend插入产生的redo size | apppend + parallel插入产生的redo size |
|---|---|---|---|---|
| 数据库模式 | archive | |||
| nologing | t2 | 67752144 | 143436 | 21916 |
| loging | t3 | 67875992 | 68384900 | 21308 |
| 数据库模式 | noarchive | |||
| nologing | t2 | 67754744 | 143480 | 21896 |
| loging | t3 | 67757328 | 143420 | 21896 |
1）数据库处于ARCHIVE模式时，
对logging表执行append插入，是对性能没有优化的。加并行parallel才会有影响。
2）数据库处于NOARCHIVE模式时，对logging表执行append插入，可以有效的提升性能。当然加并行parallel效果会更好
Insert 语句对 nologging 与 logging表 在不同场景下的优化的更多相关文章
- oracle带条件的Insert语句
背景 在一条记录完结时,自动向表中加入一条新的记录,采用的是事务处理,修改现有记录,并新增一条记录,直接采用的insert语句会报错 //主键冲突 unique constraint (XXXXXX) ...
- SQL基础语法—insert语句
1 insert语句 insert语句用于插入数据到表中,其基本语法有以下三种: Syntax: INSERT [LOW_PRIORITY | DELAYED | HIGH_PRIORITY] [IG ...
- 关于加快INSERT语句执行速度和HINT /*+ append */及/*+ append nologging */的使用
(非归档模式下)创建表T01: SQL> create table t01 as select * from dba_objects where 1=2; Table created. (非归档 ...
- SQLServer将表数据导出为Insert语句
从网上找到的方法,不过很不错,记录下来,也算是分享下~~ 有一个表,city,有列:cityID,cityName;将此表中所有数据,变为insert语句 select 'insert into ta ...
- 取得表中数据的insert语句
Build Insert Statements for the Existing Data in Tables 下面这个脚本实现了取得一个非空表中的所有insert语句 This script bui ...
- 【SQL Sever】将SQL Sever中的一个数据表的数据导出为insert语句
例如:这SQL Sever中的一张数据表,想要将这张数据表中的数据 转化成一个一个的insert语句存储在txt的文档中,那么不论走到那里这个insert语句一执行,我们就能将这个数据表中的数据 ...
- 使用C#导出MSSQL表数据Insert语句,支持所有MSSQL列属性
在正文开始之前,我们先看一下MSSQL的两张系统表sys.objects . syscolumnsMSDN中 sys.objects表的定义:在数据库中创建的每个用户定义的架构作用域内的对象在该表中均 ...
- select into from和insert into select from两种表复制语句区别
select into from和insert into select from两种表复制语句都是将源表source_table的记录插入到目标表target_table,但两句又有区别. 第一句(s ...
- 表数据转换为insert语句
/* 对象:导出物理表数据为Insert语句 描述:可以传递条件精确导出sql 加条件的前提是只知道相应的字段名及类型 */ from sysobjects where name ='proc_ins ...
随机推荐
- bzoj 3503: [Cqoi2014]和谐矩阵【高斯消元】
如果确定了第一行,那么可以推出来整个矩阵,矩阵合法的条件是n+1行全是0 所以推出来n+1行和1行的关系,然后用异或高斯消元来解即可 #include<iostream> #include ...
- Spring 中 ApplicationContext 和 BeanFactory 的区别
//从ApplicationContext 中取 bean ApplicationContext ac = new ClassPathXmlApplicationContext ( "com ...
- poj 2299 Ultra-QuickSort 归并排序求逆序数对
题目链接: http://poj.org/problem?id=2299 题目描述: 给一个有n(n<=500000)个数的杂乱序列,问:如果用冒泡排序,把这n个数排成升序,需要交换几次? 解题 ...
- 题解报告：hdu 1124 Factorial（求N！尾数有多少个0。）
题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1124 Problem Description The most important part of a ...
- synchronized(3)修饰语句块之：synchronized(一般对象)
synchronized(一般对象) 一次只有一个线程进入该代码块.此时,线程获得的是成员锁.例如: public class Thread7 { private Object xlock = new ...
- java数组实现买彩票（重复则重新遍历查询思想）
package com.wh.shuzu; import java.util.Arrays; /** * 买彩票 * @author 丁璐同学 * 重复则重新遍历查询思想 */ public clas ...
- iOS判断输入的字符串是否是纯数字
主要用于判断输入到TextField的内容是不是数字,比如需要输入电话号码的时候. 网上查看了一些资料,一般都是通过协议. 以下内容来自:http://www.2cto.com/kf/201404/2 ...
- mysqlshow(数据库对象查看工具)
mysqlshow是mysql客户端对象查看工具,可以用来查看数据库.数据库中的表.表中的列.索引等. 1.mysqlshow命令的语法 shell > mysqlshow [options] ...
- 外文翻译 《How we decide》赛场上的四分卫 第四节
这是第一章的最后一节. 书的导言 本章第一节 本章第二节 本章第三节 制作肥皂剧是非常不易的.整个制作组都要很紧张的工作,每天都要拍摄一些新的事件.新的大转折的剧情需要被想象出来,新的剧本需要被编写, ...
- iOS 画环形图
由于新项目的的需求,需要画环形图,由于以前都没接触过这一类(我是菜鸟),去cocochina山找到了一个案例,个人觉得还可以,分享一下 github 地址https://github.com/zhou ...