MySQL，错误 126：表的密钥文件不正确

我阅读了以下相关问题，但答复并不令我满意：MySQL：#126 - 表的密钥文件不正确 https://stackoverflow.com/q/2011050/570796

问题

运行查询时出现此错误

错误 126 (HY000)：表的密钥文件不正确`

问题

当我试图找到问题时，我找不到问题，所以我不知道如何使用修复命令来修复它。 有没有任何指示告诉我如何以我已经尝试过的任何其他方式找到导致此问题的问题？

查询

mysql>       SELECT
    ->         Process.processId,
    ->         Domain.id AS domainId,
    ->         Domain.host,
    ->         Process.started,
    ->         COUNT(DISTINCT Joppli.id) AS countedObjects,
    ->         COUNT(DISTINCT Page.id)   AS countedPages,
    ->         COUNT(DISTINCT Rule.id)   AS countedRules
    ->       FROM Domain
    ->         JOIN CustomScrapingRule
    ->           AS Rule
    ->           ON Rule.Domain_id = Domain.id
    ->           LEFT JOIN StructuredData_Joppli
    ->             AS Joppli
    ->             ON Joppli.CustomScrapingRule_id = Rule.id
    ->         LEFT JOIN Domain_Page
    ->           AS Page
    ->           ON Page.Domain_id = Domain.id
    ->         LEFT JOIN Domain_Process
    ->           AS Process
    ->           ON Process.Domain_id = Domain.id
    ->       WHERE Rule.CustomScrapingRule_id IS NULL
    ->       GROUP BY Domain.id
    ->       ORDER BY Domain.host;
ERROR 126 (HY000): Incorrect key file for table '/tmp/#sql_2b5_4.MYI'; try to repair it

mysql检查

root@scraper:~# mysqlcheck -p scraper
Enter password: 
scraper.CustomScrapingRule                         OK
scraper.Domain                                     OK
scraper.Domain_Page                                OK
scraper.Domain_Page_Rank                           OK
scraper.Domain_Process                             OK
scraper.Log                                        OK
scraper.StructuredData_Joppli                      OK
scraper.StructuredData_Joppli_Product              OK

计数行数

mysql> select count(*) from CustomScrapingRule;
+----------+
| count(*) |
+----------+
|       26 |
+----------+
1 row in set (0.04 sec)

mysql> select count(*) from Domain;
+----------+
| count(*) |
+----------+
|        2 |
+----------+
1 row in set (0.01 sec)

mysql> select count(*) from Domain_Page;
+----------+
| count(*) |
+----------+
|   134288 |
+----------+
1 row in set (0.17 sec)

mysql> select count(*) from Domain_Page_Rank;
+----------+
| count(*) |
+----------+
|  4671111 |
+----------+
1 row in set (11.69 sec)

mysql> select count(*) from Domain_Process;
+----------+
| count(*) |
+----------+
|        2 |
+----------+
1 row in set (0.02 sec)

mysql> select count(*) from Log;
+----------+
| count(*) |
+----------+
|       41 |
+----------+
1 row in set (0.00 sec)

mysql> select count(*) from StructuredData_Joppli;
+----------+
| count(*) |
+----------+
|    11433 |
+----------+
1 row in set (0.16 sec)

mysql> select count(*) from StructuredData_Joppli_Product;
+----------+
| count(*) |
+----------+
|   130784 |
+----------+
1 row in set (0.20 sec)

Update

磁盘使用情况

root@scraper:/tmp# df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/xvda1       20G  4.7G   15G  26% /
none            4.0K     0  4.0K   0% /sys/fs/cgroup
udev            237M  4.0K  237M   1% /dev
tmpfs            49M  188K   49M   1% /run
none            5.0M     0  5.0M   0% /run/lock
none            245M     0  245M   0% /run/shm
none            100M     0  100M   0% /run/user

您的查询似乎返回了一个大型中间结果集，需要 创建临时表并配置 mysql 临时表的位置 磁盘表 (/tmp) 对于生成的临时表来说不够大。

您可以尝试通过重新挂载来增加 tmpfs 分区大小：

mount -t tmpfs -o remount,size=1G tmpfs /tmp

您可以通过编辑 /etc/fstab 使此更改永久生效

如果您无法执行此操作，您可以尝试更改磁盘位置 通过编辑 my.cnf 文件中的“tmpdir”条目（或添加 如果它还不存在的话）。请记住您的目录 choice 应该可由 mysql 用户写入

您还可以尝试通过增加来阻止创建磁盘临时表 mysql 配置选项的值：

tmp_table_size
max_heap_table_size

到更大的值。您需要增加上述两个参数

例子：

set global tmp_table_size = 1G;
set global max_heap_table_size = 1G;