db2日常命令，离线备份，监控优化步骤

最近db2项目投产，运维同事搭建完数据库后，剩余投产工作内容积累的命令如下，mark一下

db2 "drop database amsTest"

cd /home/db2inst2/

mkdir db2data

mkdir db2log

//建表

db2 "create database amsTest using codeset utf-8  territory CN"

//创建缓冲池

db2 connect to amsTest

//修改日志路径

db2 "update db cfg for amsTest using NEWLOGPATH /home/db2inst2/db2log"

chown -R db2inst1:db2iadm1 db2data

db2 "create bufferpool bp32k all nodes size -1 pagesize 32k"

//表空间使用缓冲池 

db2 "create tablespace tbs32k pagesize 32K  MANAGED BY DATABASE USING(FILE '/home/db2inst2/db2data/amsTesttablespace01' 128000) EXTENTSIZE 80 bufferpool bp32k"

//db2 "drop tablespace tbs32k"

//增加临时表空间

//CREATE TEMPORARY TABLESPACE TEMPSPACE01 PAGESIZE 32K MANAGED BY DATABASE USING(FILE '/home/db2/db2root/NODE0000/TBS/tablespace01' 128000) EXTENTSIZE 80 bufferpool bp32k;

db2 "CREATE TEMPORARY TABLESPACE TEMPSPACE01 PAGESIZE 32K MANAGED BY DATABASE USING(FILE '/home/db2inst2/db2data/amsTesttmptablespace01' 128000) EXTENTSIZE 80 bufferpool bp32k"

--查看db2的端口

tail -10 /etc/services |grep DB2_db2inst2

显示如下内容

DB2_db2inst1 60000/tcp

DB2_db2inst1_1 60001/tcp

DB2_db2inst1_2 60002/tcp

DB2_db2inst1_3 60003/tcp

DB2_db2inst1_4 60004/tcp

db2 update dbm cfg using SVCENAME DB2_db2inst2

db2ilist

db2stop force

db2start

db2 get dbm cfg |grep SVC

db2 get dbm cfg |grep "SVCENAME"

netstat -an |grep 60000

db2_kill

ipclean

--离线数据库备份

db2 backup database amsTest with 2 buffers buffer 1024 parallelism 1 without prompting

db2 restore db amshrbcb from  /home/db2inst2/db2bak taken at 20171013104624 with 2 buffers buffer 1024 parallelism 1 without prompting

db2 restore db amsTest from  /home/db2inst2/db2bak taken at 20171013101332 with 2 buffers buffer 1024 parallelism 1 without prompting

mv /home/db2inst2/db2bak/AMSTEST.0.db2inst2.DBPART000.20171013101332.001 /home/db2inst2/db2bak/

db2set db2comm=TCPIP

--db2数据库监控

db2top -d NEWSEAL -u db2inst2 -p db2inst2

l -是查询session

D -查看sql语句

a -查看l下具体的session的语句

L -查看D下具体的sql ID对应的语句

vi  t1.sql :wq推出保存

db2expln -database newseal -i -g -stmtfile t1.sql -terminator ';' -output t1.exp

db2expln -database newseal -i -g -stmtfile t2.sql -terminator ';' -output t2.exp、

db2expln -database newseal -i -g -stmtfile t3.sql -terminator ';' -output t3.exp

消耗值：Estimated Cost = 148207.421875

全表扫描：TBSCAN  

Estimated Cost = 148333.359375

Estimated Cost = 11146.720703

Estimated Cost = 70565.273438

db2 "describe indexes for table Pack"

查看索引

db2 "describe indexes for table CardImage"