myisam_sort_buffer_size 是 MySQL 中的一个配置参数,它用于指定在使用 MyISAM 存储引擎时,MySQL 用于进行排序操作时使用的缓存大小。具体来说,当 MySQL 执行需要对 MyISAM 存储引擎中的数据进行排序的查询语句时,myisam_sort_buffer_size 参数指定了 MySQL 用于排序操作的内存缓存大小。 底层原理是,MySQL 在进行...
一旦我们连接到MySQL服务器,我们就可以执行以下命令来查看myisam_sort_buffer_size参数: SHOW VARIABLES LIKE 'myisam_sort_buffer_size'; 1. 5. 解释结果 执行上述命令后,系统将返回myisam_sort_buffer_size参数的当前值。我们可以根据返回的结果来确认参数的配置情况。 6. 修改myisam_sort_buffer_size参数(可选...
通过PHP获取myisam_sort_buffer_size值可以使用MySQL的SHOW VARIABLES语句来查询。具体的代码如下: 代码语言:php 复制 <?php// 连接MySQL数据库$servername="localhost";$username="username";$password="password";$dbname="database";$conn=newmysqli($servername,$username,$password,$dbname);if($conn->connec...
2.设置global级别的参数 mysql> set global myisam_sort_buffer_size=128*1024*1024; Query OK, 0 rows affected (0.00 sec) 1. 2. 3.设置/etc/my.cnf文件 [root@mysql57 ~]# cat /etc/my.cnf | grep -i myisam-sort myisam-sort-buffer-size = 128M [root@mysql57 ~]# service mysqld resta...
sort_buffer_size vs myisam_sort_buffer_size myisam_sort_buffer_size: session/global级别,可动态变更 设置在REPAIR TABLE,或者用 CREATE INDEX 创建索引或 ALTER TABLE 的过程中排序索引所分配的缓冲区大小。可设置范围4Bytes 至 4GB,默认为8MB。 sort_buffer_size:...
I am MySQL on server with 6GB RAM. I need to know what is the difference between myisam_sort_buffer_size and sort_buffer_size? I have following size set to them: myisam_sort_buffer_size = 8M sort_buffer_size = 256M Please also mention if these values are fine or need adjustments?
看到sort_buffer_size这个参数(connect级别的参数,MySQL5.7,默认值是1048576字节,也就是1MB) 解决办法: </>code myisamchk -c -r ../data/zqdata/zz_info --sort_buffer_size=2G
1) myisam_sort_buffer_size=512MB & 2) myisam_sort_buffer_size=1024MB but i did not changed sort_buffer_size. Is it proper setting ? Do i need to make best combination of myisam_sort_buffer_size & sort_buffer_size ? Thank you, ...
Description:The myisam_sort_buffer_size displays a 0 when setting the value equal to or greater than 4G in the my.cnf file. It does not show any warnings or errors in mysql or error logs. With a value of 0 it causes (perhaps forces) sorting by key-cache.How to repeat:1. Stop mys...
--http://dev.mysql.com/doc/refman/5.1/en/server-system-variables.html#sysvar_myisam_sort_buffer_size I think it is used for ALTER, REPAIR, OPTIMIZE, and LOAD DATA; set it when you need it. It is probably per-thread, so don't set it to a high value until you need it. See comm...