RHELMariaDB
bitsCN.comInstallation MariaDB5.5 on RHEL6
yum -y install gcc gcc-c++ autoconf libjpeg libjpeg-devel libpng libpng-devel freetype freetype-devel libxml2 libxml2-devel zlib zlib-devel glibc glibc-devel glib2 glib2-devel bzip2 bzip2-devel ncurses ncurses-devel curl curl-devel ssse2fsprogs e2fsprogs-devel krb5 krb5-devel libidn libidn-devel openssl openssl-devel openldap openldap-devel nss_ldap openldap-clients openldap-servers gettext-devel libXpm-devel libtool perl-DBD-MySQL bison cmake [root@test mariadb-5.5.33a]# mkdir -p /data/mariadb5.5 /service/mariadb5.5 [root@test mariadb-5.5.33a]# cmake . -DCMAKE_INSTALL_PREFIX=/service/mariadb5.5 -DMYSQL_UNIX_ADDR=/data/mariadb5.5/mariadb.sock -DMYSQL_DATADIR=/data/mariadb5.5 -DSYSCONFDIR=/service/mariadb5.5 -DMYSQL_USER=mysql -DMYSQL_TCP_PORT=30308 -DWITH_XTRADB_STORAGE_ENGINE=1 -DWITH_INNOBASE_STORAGE_ENGINE=1 -DWITH_PARTITION_STORAGE_ENGINE=1 -DWITH_BLACKHOLE_STORAGE_ENGINE=1 -DWITH_MYISAM_STORAGE_ENGINE=1 -DWITH_READLINE=1 -DENABLED_LOCAL_INFILE=1 -DWITH_EXTRA_CHARSETS=1 -DDEFAULT_CHARSET=utf8 -DDEFAULT_COLLATION=utf8_general_ci -DEXTRA_CHARSETS=all -DWITH_BIG_TABLES=1 -DWITH_DEBUG=0 -DCOMPILATION_COMMENT=ZWC-MariaDB [root@test mariadb-5.5.33a]# make && make install [root@test ~]# cat /service/mariadb5.5/my.cnf [client] port = 30308 socket = /data/mariadb5.5/mariadb.sock
[mysqld] port = 30308 socket = /data/mariadb5.5/mariadb.sock skip-external-locking back_log = 500 lower_case_table_names = 1 skip-name-resolve max_connections = 1024 table_open_cache = 512 binlog_cache_size = 1M max_heap_table_size = 300M read_buffer_size = 10M read_rnd_buffer_size = 16M sort_buffer_size = 8M join_buffer_size=4M thread_cache_size = 4 thread_concurrency = 4 query_cache_size = 200M ft_min_word_len = 4 thread_stack = 192K tmp_table_size = 200M slow_query_log long_query_time = 2 slow_query_log_file = /data/mariadb5.5/slowsql.sql key_buffer_size = 32M bulk_insert_buffer_size = 64M myisam_sort_buffer_size = 128M myisam_max_sort_file_size = 200M myisam_repair_threads = 4 myisam_recover # setup innodb innodb_additional_mem_pool_size = 16M innodb_buffer_pool_size = 2500M innodb_data_file_path = ibdata1:10M:autoextend innodb_write_io_threads = 4 innodb_read_io_threads = 4 innodb_thread_concurrency = 16 innodb_flush_log_at_trx_commit = 2 innodb_log_buffer_size = 8M innodb_log_file_size = 512M innodb_log_files_in_group = 3 innodb_max_dirty_pages_pct = 90 innodb_lock_wait_timeout = 120 init_connect = 'SET autocommit=0' innodb-file-per-table = 1 innodb-open-file = 500 innodb_flush_method=O_DIRECT open_files_limit = 65535 expire_logs_days = 5 event_scheduler = 1 log-bin=binlog-master binlog_format=mixed server-id = 1 [mysqldump] quick max_allowed_packet = 16M [mysql] prompt=//u@//d //r://m://s> no-auto-rehash [myisamchk] key_buffer_size = 128M sort_buffer_size = 128M read_buffer = 2M write_buffer = 2M [mysqlhotcopy] interactive-timeout [root@test ~]# /service/mariadb5.5/scripts/mysql_install_db --defaults-file=/service/mariadb5.5/my.cnf --basedir=/service/mariadb5.5 --datadir=/data/mariadb5.5 --user=mysql Installing MariaDB/MySQL system tables in '/data/mariadb5.5' ... OK Filling help tables... OK To start mysqld at boot time you have to copy support-files/mysql.server to the right place for your system PLEASE REMEMBER TO SET A PASSWORD FOR THE MariaDB root USER ! To do so, start the server, then issue the following commands: '/service/mariadb5.5/bin/mysqladmin' -u root password 'new-password' '/service/mariadb5.5/bin/mysqladmin' -u root -h 192.168.1.9 password 'new-password' Alternatively you can run: '/service/mariadb5.5/bin/mysql_secure_installation' which will also give you the option of removing the test databases and anonymous user created by default. This is strongly recommended for production servers. See the MariaDB Knowledgebase at http://kb.askmonty.org or the MySQL manual for more instructions. You can start the MariaDB daemon with: cd '/service/mariadb5.5' ; /service/mariadb5.5/bin/mysqld_safe --datadir='/data/mariadb5.5' You can test the MariaDB daemon with mysql-test-run.pl cd '/service/mariadb5.5/mysql-test' ; perl mysql-test-run.pl Please report any problems with the '/service/mariadb5.5/scripts/mysqlbug' script! The latest information about MariaDB is available at http://mariadb.org/. You can find additional information about the MySQL part at: http://dev.mysql.com Support MariaDB development by buying support/new features from Monty Program Ab. You can contact us about this at sales@montyprogram.com. Alternatively consider joining our community based development effort: http://kb.askmonty.org/en/contributing-to-the-mariadb-project/ [root@test ~]# /service/mariadb5.5/bin/mysqld_safe --defaults-file=/service/mariadb5.5/my.cnf --basedir=/service/mariadb5.5 --datadir=/data/mariadb5.5 --user=mysql & [1] 19871 [root@test ~]# 131101 22:58:50 mysqld_safe Logging to '/data/mariadb5.5/test.err'. 131101 22:58:50 mysqld_safe Starting mysqld daemon with databases from /data/mariadb5.5 [root@test ~]# /service/mariadb5.5/bin/mysqladmin -uroot password New password: Confirm new password: [root@test ~]# [root@test ~]# [root@test ~]# /service/mariadb5.5/bin/mysql -uroot -p Enter password: ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES) [root@test ~]# /service/mariadb5.5/bin/mysql -uroot -p Enter password: Welcome to the MariaDB monitor. Commands end with ; or /g. Your MariaDB connection id is 5 Server version: 5.5.33a-MariaDB-log ZWC-MariaDB Copyright (c) 2000, 2013, Oracle, Monty Program Ab and others. Type 'help;' or '/h' for help. Type '/c' to clear the current input statement. MariaDB [(none)]> delete from mysql.user where password=''; Query OK, 5 rows affected (0.03 sec) MariaDB [(none)]> delete from mysql.db where user=''; Query OK, 2 rows affected (0.04 sec) MariaDB [(none)]> select @@version; +---------------------+ | @@version | +---------------------+ | 5.5.33a-MariaDB-log | +---------------------+ 1 row in set (0.00 sec) MariaDB [(none)]> show engines; +--------------------+---------+----------------------------------------------------------------------------+--------------+------+------------+ | Engine | Support | Comment | Transactions | XA | Savepoints | +--------------------+---------+----------------------------------------------------------------------------+--------------+------+------------+ | MRG_MYISAM | YES | Collection of identical MyISAM tables | NO | NO | NO | | InnoDB | DEFAULT | Percona-XtraDB, Supports transactions, row-level locking, and foreign keys | YES | YES | YES | | CSV | YES | CSV storage engine | NO | NO | NO | | BLACKHOLE | YES | /dev/null storage engine (anything you write to it disappears) | NO | NO | NO | | MyISAM | YES | MyISAM storage engine | NO | NO | NO | | PERFORMANCE_SCHEMA | YES | Performance Schema | NO | NO | NO | | MEMORY | YES | Hash based, stored in memory, useful for temporary tables | NO | NO | NO | | Aria | YES | Crash-safe tables with MyISAM heritage | NO | NO | NO | +--------------------+---------+----------------------------------------------------------------------------+--------------+------+------------+ 8 rows in set (0.00 sec) MariaDB [(none)]>
Percona-XtraDB, Supports transactions, row-level locking, and foreign keys
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如何有效监控MySQL性能?使用mysqladmin、SHOWGLOBALSTATUS、PerconaMonitoringandManagement(PMM)和MySQLEnterpriseMonitor等工具。1.使用mysqladmin查看连接数。2.用SHOWGLOBALSTATUS查看查询数。3.PMM提供详细性能数据和图形化界面。4.MySQLEnterpriseMonitor提供丰富的监控功能和报警机制。

MySQL和SQLServer的区别在于:1)MySQL是开源的,适用于Web和嵌入式系统,2)SQLServer是微软的商业产品,适用于企业级应用。两者在存储引擎、性能优化和应用场景上有显着差异,选择时需考虑项目规模和未来扩展性。

在需要高可用性、高级安全性和良好集成性的企业级应用场景下,应选择SQLServer而不是MySQL。1)SQLServer提供企业级功能,如高可用性和高级安全性。2)它与微软生态系统如VisualStudio和PowerBI紧密集成。3)SQLServer在性能优化方面表现出色,支持内存优化表和列存储索引。

mySqlManagesCharacterSetsetSandCollationsyutusututf-8asthEdeFault,允许ConfigurationAtdataBase,table和columnlevels,AndrequiringCarefullageLignmentToavoidMismatches.1)setDefeaultCharactersetTercharactersetEtCollacterSeteTandColletationForAdataBase.2)conformentcollecharactersettersetertersetcollatertersetcollationcollation

MySQL触发器是与表相关联的自动执行的存储过程,用于在特定数据操作时执行一系列操作。1)触发器定义与作用:用于数据校验、日志记录等。2)工作原理:分为BEFORE和AFTER,支持行级触发。3)使用示例:可用于记录薪资变更或更新库存。4)调试技巧:使用SHOWTRIGGERS和SHOWCREATETRIGGER命令。5)性能优化:避免复杂操作,使用索引,管理事务。

在MySQL中创建和管理用户账户的步骤如下:1.创建用户:使用CREATEUSER'newuser'@'localhost'IDENTIFIEDBY'password';2.分配权限:使用GRANTSELECT,INSERT,UPDATEONmydatabase.TO'newuser'@'localhost';3.修正权限错误:使用REVOKEALLPRIVILEGESONmydatabase.FROM'newuser'@'localhost';然后重新分配权限;4.优化权限:使用SHOWGRA

MySQL适合快速开发和中小型应用,Oracle适合大型企业和高可用性需求。1)MySQL开源、易用,适用于Web应用和中小型企业。2)Oracle功能强大,适合大型企业和政府机构。3)MySQL支持多种存储引擎,Oracle提供丰富的企业级功能。

MySQL相比其他关系型数据库的劣势包括:1.性能问题:在处理大规模数据时可能遇到瓶颈,PostgreSQL在复杂查询和大数据处理上表现更优。2.扩展性:水平扩展能力不如GoogleSpanner和AmazonAurora。3.功能限制:在高级功能上不如PostgreSQL和Oracle,某些功能需要更多自定义代码和维护。


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