rpm-e--nodeps mysql-community-libs-8.0.13-1.el6.i686 #有则卸载 #将/var/lib/mysql文件夹下的所有文件都删除干净。 Step2、传安装文件到 linux 系统进行安装: #出于安全问题,建议使用 md5sum 命令核对一下文件源: md5sum mysql-5.7.24-linux-glibc2.12-i686.tar.gz mkdir/usr/local/msyql #/usr/local ...
selecttable_schemaas'数据库',sum(table_rows)as'行数',sum(truncate(data_length/1024/1024/1024,2))as'数据容量(GB)',sum(truncate(index_length/1024/1024/1024,2))as'索引容量(GB)',sum(truncate(data_free/1024/1024/1024,2))as'碎片空间(GB)',sum(truncate((data_length+index_length+data_free...
Thetable descriptionpart of the output includes a list of all keys in the table. For each key,myisamchkdisplays some low-level information: Key This key's number. This value is shown only for the first column of the key. If this value is missing, the line corresponds to the second or...
(If your operating system does not support files that large, table sizes are constrained by the file size limit.) If you want to keep down the pointer sizes to make the index smaller and faster and you don't really need big files, you can decrease the default pointer size by setting ...
`sum_of_other_index_sizes`bigint(20) unsignedNOTNULL,PRIMARYKEY(`database_name`,`table_name`) ) ENGINE=InnoDBDEFAULTCHARSET=utf8 COLLATE=utf8_bin STATS_PERSISTENT=0;CREATETABLE`slave_master_info` ( `Number_of_lines`int(10) unsignedNOTNULLCOMMENT'Number of lines in the file.', ...
void hp_free(HP_SHARE *share) { bool not_internal_table = (share->open_list.data != nullptr); if (not_internal_table) /* If not internal table */ heap_share_list = list_delete(heap_share_list, &share->open_list); hp_clear(share); /* Remove blocks from memory */ if (not_in...
ulint instance_no; // 缓冲池实例编号 ulint curr_pool_size; // 缓冲池实例大小 buf_chunk_t *chunks; // 缓冲池实例的物理块列表 hash_table_t *page_hash; // 页哈希表 hash_table_t *zip_hash; // 伙伴系统分配frame对应的block哈希表 UT_LIST_BASE_NODE_T(buf_page_t) free; // 空闲...
MySQLUserMySQLUsermysql -u 用户名 -pEnter passwordSELECT table_schema AS "Database", ROUND(SUM(data_length + index_length) / 1024 / 1024, 2) AS "Size (MB)" FROM information_schema.tables GROUP BY table_schemaList of databases with sizes ...
ALTERTABLE表名 Engine=InnoDB,STATS_SAMPLE_PAGES=具体采样页面数量; 如果在创建表的语句中没有指定STATS_SAMPLE_PAGES属性,将默认采用系统变量innodb_stats_persistent_sample_pages的值作为该属性的值。 2. clustered_index_size 和 sum_of_other_index_sizes统计项的收集 ...
有两种方式可以触发统计信息的采集:一种是手动执行,通过执行SQL:ANALYZE TABLE table_list来采集统计信息;另一种是系统自动执行。 系统自动收集统计信息的策略是,当表中更新的记录数超过一个阈值,(例如Persistent采样默认的阈值是总记录数的10%),就会将当前table加入统计信息采集的任务队列中,由后台线程来完成采集。