MySQL教程之MySQL下perror工具查看System Error Code信息

在MySQL数据库的维护过程中，我们有时候会在MySQL的错误日志文件中看到一些关于Operating system error的错误信息，例如在MySQL的错误日志里面，有时候会看到关于
 
InnoDB: Operating system error number 0.
InnoDB: Check that your OS and file system support files of this size.
InnoDB: Check also that the disk is not full or a disk quota exceeded.
 
 
InnoDB: Operating system error number 5.
...........................................
 
 那么这些System Error Code在Linux下分别代表什么意思呢？其实如果遇到错误日志里有这些对应的代码，使用MySQL自带的命令工具perror查看一下具体信息即可。非常简单方便。
 
[root@DB-Server ~]# perror 2;
OS error code   2:  No such file or directory
[root@DB-Server ~]# perror 3;
OS error code   3:  No such process
[root@DB-Server ~]# perror 4;
OS error code   4:  Interrupted system call
[root@DB-Server ~]# perror 5;
OS error code   5:  Input/output error
[root@DB-Server ~]#
 
如果你要查看一个范围的Operating system error，可以使用下面命令
 
[root@DB-Server ~]# perror `seq 0 10`
OS error code   0:  Success
OS error code   1:  Operation not permitted
OS error code   2:  No such file or directory
OS error code   3:  No such process
OS error code   4:  Interrupted system call
OS error code   5:  Input/output error
OS error code   6:  No such device or address
OS error code   7:  Argument list too long
OS error code   8:  Exec format error
OS error code   9:  Bad file descriptor
OS error code  10:  No child processes
[root@DB-Server ~]#
 
  如果是集群，那么可以shell> perror --ndb errorcode查看， 下面表格是关于Linux平台下通用的System Error Code列表，如下所示，完全没有必要硬性记住。遇到查看即可。
 
 

Number	Macro	Description
1	EPERM	Operation not permitted
2	ENOENT	No such file or directory
3	ESRCH	No such process
4	EINTR	Interrupted system call
5	EIO	I/O error
6	ENXIO	No such device or address
7	E2BIG	Arg list too long
8	ENOEXEC	Exec format error
9	EBADF	Bad file number
10	ECHILD	No child processes
11	EAGAIN	Try again
12	ENOMEM	Out of memory
13	EACCES	Permission denied
14	EFAULT	Bad address
15	ENOTBLK	Block device required
16	EBUSY	Device or resource busy
17	EEXIST	File exists
18	EXDEV	Cross-device link
19	ENODEV	No such device
20	ENOTDIR	Not a directory
21	EISDIR	Is a directory
22	EINVAL	Invalid argument
23	ENFILE	File table overflow
24	EMFILE	Too many open files
25	ENOTTY	Inappropriate ioctl for device
26	ETXTBSY	Text file busy
27	EFBIG	File too large
28	ENOSPC	No space left on device
29	ESPIPE	Illegal seek
30	EROFS	Read-only file system
31	EMLINK	Too many links

 
 
如果是Windows平台，那么也可以使用下面命令查看具体的System Error Code信息，另外，Windows平台下的System Error Code也远比Linux平台下要多，遇到了这些System Error Code，使用命令查看即可。
 
perror.exe 2
 
 
perror `perl -e "print join ' ',1..100"`
 
 
 
 
参考资料：
 
http://doc.docs.sk/mysql-refman-5.5/operating-system-error-codes.html