Oracle IO 测试工具ORION
一直想学习如何得到数据库的IO数据，ORION是一个不错的仿真测试Oracle IO的工具。
下面是我的测试的步骤：
1 从oracle的网站上下载ORION的软件（11.1.0.7）
2 解压orion_linux_x86-64.gz
3 建立参数文件 mytest.lun， 这里的列出的是分区设备，我在上面建立了asm文件系统。因为有数据在里面，所以我用write=0只测试读的IOs
/dev/sda5
/dev/sdb1
/dev/sdc1
/dev/sdd1
4. 运行命令
./orion_linux_x86-64 -run simple -testname mytest -num_disks 4
5 生成报告文件： mytest_20100426_1608_summary.txt
ORION VERSION 11.1.0.7.0
Commandline:
-run simple -testname mytest -num_disks 4
This maps to this test:
Test: mytest
Small IO size: 8 KB
Large IO size: 1024 KB
IO Types: Small Random IOs, Large Random IOs
Simulated Array Type: CONCAT
Write: 0%
Cache Size: Not Entered
Duration for each Data Point: 60 seconds
Small Columns:, 0
Large Columns:, 0, 1, 2, 3, 4, 5, 6, 7,
8
Total Data Points: 29
Name: /dev/sda5 Size: 102404703744
Name: /dev/sdb1 Size: 102404703744
Name: /dev/sdc1 Size: 102404703744
Name: /dev/sdd1 Size: 102404703744
4 FILEs found.
Maximum Large MBPS=62.98 @ Small=0 and Large=7
Maximum Small IOPS=648 @ Small=20 and Large=0
Minimum Small Latency=7.35 @ Small=1 and Large=0
6 可以看到最大的IOPS是648，每个disk大概162，最大的MBPS是62M。
相关文档：
oracle grant
授权语句--select * from dba_users; 查询数据库中的所有用户
--alter user TEST_SELECT account lock; 锁住用户
--alter user TEST_SELECT account unlock; 给用户解锁
--create user xujin identified by xujin; 建立用户
--grant create tablespace to xujin; 授权
--grant select ......
/**
*
*/
package com.huawei.widget.util;
import java.math.BigDecimal;
/**
* @author tanjixuan
* @since 2008-12-20
*
*/
public final class DatabaseUtil
{
// oracle转义字符
public static final char ORACLE_ESCAPE_CHAR = '\\';
// orac ......
select * from perexl order by nlssort(danwei,'NLS_SORT=SCHINESE_PINYIN_M');
-- 按部首排序
select * from perexl order by nlssort(danwei,'NLS_SORT=SCHINESE_STROKE_M');
-- 按笔画排序
select * from perexl order by nlssort(danwei,'NLS_SORT=SCHINESE_RADICAL_M');
--排序后获取第 ......
36.ADD_MONTHS
增加或减去月份
SQL> select to_char(add_months(to_date(199912,yyyymm),2),yyyymm) from dual;
TO_CHA
------
200002
SQL> select to_char(add_months(to_date(199912,yyyymm),-2),yyyymm) from dual;
TO_CHA
------
199910
37.LAST_DAY
返� ......
一次oracle 10g rac故障处理:
rhel4-1->crs_stat -t
Name Type Target State Host
------------ ......
