求助军哥，lnmp1.2的mysql突然挂了，附上日志，求解决

木风木

1. 151031 04:01:36 mysqld_safe Number of processes running now: 0
   
2. 151031 04:01:37 mysqld_safe mysqld restarted
   
3. 2015-10-31 04:01:39 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
   
4. 2015-10-31 04:01:39 8079 [Note] Plugin 'FEDERATED' is disabled.
   
5. 2015-10-31 04:01:39 7f302b5e8720 InnoDB: Warning: Using innodb_additional_mem_pool_size is DEPRECATED. This option may be removed in future releases, together with the option innodb_use_sys_malloc and with the InnoDB's internal memory allocator.
   
6. 2015-10-31 04:01:39 8079 [Note] InnoDB: Using atomics to ref count buffer pool pages
   
7. 2015-10-31 04:01:39 8079 [Note] InnoDB: The InnoDB memory heap is disabled
   
8. 2015-10-31 04:01:39 8079 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
   
9. 2015-10-31 04:01:39 8079 [Note] InnoDB: Memory barrier is not used
   
10. 2015-10-31 04:01:39 8079 [Note] InnoDB: Compressed tables use zlib 1.2.3
    
11. 2015-10-31 04:01:39 8079 [Note] InnoDB: Using CPU crc32 instructions
    
12. 2015-10-31 04:01:39 8079 [Note] InnoDB: Initializing buffer pool, size = 16.0M
    
13. 2015-10-31 04:01:39 8079 [Note] InnoDB: Completed initialization of buffer pool
    
14. 2015-10-31 04:01:40 8079 [Note] InnoDB: Highest supported file format is Barracuda.
    
15. 2015-10-31 04:01:40 8079 [Note] InnoDB: The log sequence numbers 4607677 and 4607677 in ibdata files do not match the log sequence number 4880103 in the ib_logfiles!
    
16. 2015-10-31 04:01:40 8079 [Note] InnoDB: Database was not shutdown normally!
    
17. 2015-10-31 04:01:40 8079 [Note] InnoDB: Starting crash recovery.
    
18. 2015-10-31 04:01:40 8079 [Note] InnoDB: Reading tablespace information from the .ibd files...
    
19. 2015-10-31 04:01:40 8079 [Note] InnoDB: Restoring possible half-written data pages
    
20. 2015-10-31 04:01:40 8079 [Note] InnoDB: from the doublewrite buffer...
    
21. InnoDB: Last MySQL binlog file position 0 624432200, file name mysql-bin.000012
    
22. 2015-10-31 04:01:40 8079 [Note] InnoDB: 128 rollback segment(s) are active.
    
23. 2015-10-31 04:01:40 8079 [Note] InnoDB: Waiting for purge to start
    
24. 2015-10-31 04:01:40 8079 [Note] InnoDB: 5.6.23 started; log sequence number 4880103
    
25. 2015-10-31 04:01:40 8079 [Note] Recovering after a crash using mysql-bin
    
26. 2015-10-31 04:01:48 8079 [Note] Starting crash recovery...
    
27. 2015-10-31 04:01:48 8079 [Note] Crash recovery finished.
    
28. 2015-10-31 04:01:48 8079 [Note] Server hostname (bind-address): '*'; port: 3306
    
29. 2015-10-31 04:01:48 8079 [Note] IPv6 is available.
    
30. 2015-10-31 04:01:48 8079 [Note]   - '::' resolves to '::';
    
31. 2015-10-31 04:01:48 8079 [Note] Server socket created on IP: '::'.
    
32. 2015-10-31 04:01:48 8079 [Note] Event Scheduler: Loaded 0 events
    
33. 2015-10-31 04:01:48 8079 [Note] /usr/local/mysql/bin/mysqld: ready for connections.
    
34. Version: '5.6.23-log'  socket: '/tmp/mysql.sock'  port: 3306  Source distribution
    
35. 151031 04:03:28 mysqld_safe Number of processes running now: 0
    
36. 151031 04:03:28 mysqld_safe mysqld restarted
    
37. 2015-10-31 04:03:28 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
    
38. 2015-10-31 04:03:28 8238 [Note] Plugin 'FEDERATED' is disabled.
    
39. 2015-10-31 04:03:28 7f9a6f9ba720 InnoDB: Warning: Using innodb_additional_mem_pool_size is DEPRECATED. This option may be removed in future releases, together with the option innodb_use_sys_malloc and with the InnoDB's internal memory allocator.
    
40. 2015-10-31 04:03:28 8238 [Note] InnoDB: Using atomics to ref count buffer pool pages
    
41. 2015-10-31 04:03:28 8238 [Note] InnoDB: The InnoDB memory heap is disabled
    
42. 2015-10-31 04:03:28 8238 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
    
43. 2015-10-31 04:03:28 8238 [Note] InnoDB: Memory barrier is not used
    
44. 2015-10-31 04:03:28 8238 [Note] InnoDB: Compressed tables use zlib 1.2.3
    
45. 2015-10-31 04:03:28 8238 [Note] InnoDB: Using CPU crc32 instructions
    
46. 2015-10-31 04:03:28 8238 [Note] InnoDB: Initializing buffer pool, size = 16.0M
    
47. 2015-10-31 04:03:28 8238 [Note] InnoDB: Completed initialization of buffer pool
    
48. 2015-10-31 04:03:29 8238 [Note] InnoDB: Highest supported file format is Barracuda.
    
49. 2015-10-31 04:03:29 8238 [Note] InnoDB: The log sequence numbers 4607677 and 4607677 in ibdata files do not match the log sequence number 4880113 in the ib_logfiles!
    
50. 2015-10-31 04:03:29 8238 [Note] InnoDB: Database was not shutdown normally!
    
51. 2015-10-31 04:03:29 8238 [Note] InnoDB: Starting crash recovery.
    
52. 2015-10-31 04:03:29 8238 [Note] InnoDB: Reading tablespace information from the .ibd files...
    
53. 2015-10-31 04:03:29 8238 [Note] InnoDB: Restoring possible half-written data pages
    
54. 2015-10-31 04:03:29 8238 [Note] InnoDB: from the doublewrite buffer...
    
55. InnoDB: Last MySQL binlog file position 0 624432200, file name mysql-bin.000012
    
56. 2015-10-31 04:03:29 8238 [Note] InnoDB: 128 rollback segment(s) are active.
    
57. 2015-10-31 04:03:29 8238 [Note] InnoDB: Waiting for purge to start
    
58. 2015-10-31 04:03:29 8238 [Note] InnoDB: 5.6.23 started; log sequence number 4880113
    
59. 2015-10-31 04:03:29 8238 [Note] Recovering after a crash using mysql-bin
    
60. 2015-10-31 04:03:29 8238 [Note] Starting crash recovery...
    
61. 2015-10-31 04:03:29 8238 [Note] Crash recovery finished.
    
62. 2015-10-31 04:03:29 8238 [Note] Server hostname (bind-address): '*'; port: 3306
    
63. 2015-10-31 04:03:29 8238 [Note] IPv6 is available.
    
64. 2015-10-31 04:03:29 8238 [Note]   - '::' resolves to '::';
    
65. 2015-10-31 04:03:29 8238 [Note] Server socket created on IP: '::'.
    
66. 2015-10-31 04:03:29 8238 [Note] Event Scheduler: Loaded 0 events
    
67. 2015-10-31 04:03:29 8238 [Note] /usr/local/mysql/bin/mysqld: ready for connections.
    
68. Version: '5.6.23-log'  socket: '/tmp/mysql.sock'  port: 3306  Source distribution
    
69. 151031 04:06:35 mysqld_safe Number of processes running now: 0
    
70. 151031 04:06:35 mysqld_safe mysqld restarted
    
71. 2015-10-31 04:06:36 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
    
72. 2015-10-31 04:06:36 8465 [Note] Plugin 'FEDERATED' is disabled.
    
73. 2015-10-31 04:06:36 7fcc2c177720 InnoDB: Warning: Using innodb_additional_mem_pool_size is DEPRECATED. This option may be removed in future releases, together with the option innodb_use_sys_malloc and with the InnoDB's internal memory allocator.
    
74. 2015-10-31 04:06:36 8465 [Note] InnoDB: Using atomics to ref count buffer pool pages
    
75. 2015-10-31 04:06:36 8465 [Note] InnoDB: The InnoDB memory heap is disabled
    
76. 2015-10-31 04:06:36 8465 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
    
77. 2015-10-31 04:06:36 8465 [Note] InnoDB: Memory barrier is not used
    
78. 2015-10-31 04:06:36 8465 [Note] InnoDB: Compressed tables use zlib 1.2.3
    
79. 2015-10-31 04:06:36 8465 [Note] InnoDB: Using CPU crc32 instructions
    
80. 2015-10-31 04:06:36 8465 [Note] InnoDB: Initializing buffer pool, size = 16.0M
    
81. 2015-10-31 04:06:36 8465 [Note] InnoDB: Completed initialization of buffer pool
    
82. 151031 04:06:36 mysqld_safe mysqld from pid file /usr/local/mysql/var/DreamSever.pid ended

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上面是错误信息，

因为每天4点我都定时执行数据库全部备份操作，之前没问题，就今天突然出错了！
备份脚本是：

1. #使用命令导出SQL数据库,并且按数据库分个压缩
   
2. for db in `mysql -u$MYSQL_USER -p$MYSQL_PASS -B -N -e 'SHOW DATABASES' | xargs`; do
   
3.     (mysqldump -u$MYSQL_USER -p$MYSQL_PASS ${db} --events --skip-lock-tables | gzip -9 - > ${db}.sql.gz)
   
4. done

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请军哥看下是那里的问题导致的，万分感谢！

licess

检查一下数据库目录权限

有监控没，崩溃时内存占用多少

前面都没问题，可以尝试删除/usr/local/mysql/var/下的ib_logfile0、ib_logfile1、ibdata1，然后重启试试


还不行可以尝试/etc/my.cnf 里加[mysqld]下面添加上
innodb_force_recovery = 3
试试

木风木

数据库占用内存挺高！