MySQL，错误126：表的密钥文件不正确

Question

我阅读了以下具有相关性的问题，但答复并未使我满意：MySQL：＃126-表的密钥文件不正确

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repair命令修复它。在我已经尝试过之后，是否有其他任何方法可以指示我如何找到导致此问题的问题呢？

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

mysqlcheck

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

计算行

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)

更新资料

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

Answer 1

看来您的查询返回的是一个大型的中间结果集，需要创建一个临时表，并且mysql临时磁盘表（/ tmp）的配置位置对于生成的临时表来说还不够大。

您可以尝试通过重新安装来增加tmpfs分区的大小：

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

如果无法执行此操作，则可以尝试通过编辑my.cnf文件中的“
tmpdir”条目来更改磁盘临时表的位置（如果尚未存在，请添加它）。请记住，您选择的目录应该是mysql用户可写的

您也可以尝试通过增加mysql配置选项的值来阻止在磁盘上创建临时表：

tmp_table_size
max_heap_table_size

更大的值。您将需要同时增加以上两个参数

例：

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