针对 MySQL ER_MICROSECOND_TIMER_IS_NOT_AVAILABLE 报错,核心原因是当前平台或 MySQL 版本不支持微秒级定时器。修复方案包括:首先检查 MySQL 版本及平台兼容性,确认 performance_schema 中的 performance_timers 表是否显示 MICROSECOND 为 NULL;其次,升级 MySQL 至支持该功能的版本或重新编译服务器;最后,若无法升级,可改用操作系统内置函数替代定时器功能。远程处理时,应优先查看错误日志定位具体配置问题,确保数据目录和配置文件路径正确,必要时联系官方支持获取针对性技术分析,避免盲目修改配置导致服务不可用。
MySQL Error number: MY-011039; Symbol: ER_MICROSECOND_TIMER_IS_NOT_AVAILABLE; SQLSTATE: HY000 报错 故障修复 远程处理
MySQL Error number: MY-011039; Symbol: ER_MICROSECOND_TIMER_IS_NOT_AVAILABLE; SQLSTATE: HY000 报错 故障修复 远程处理 文档解释 Error number: MY-011039; Symbol: ER_MICROSECOND_TIMER_IS_NOT_AVAILABLE; SQLSTATE: HY000 Message: The MICROSECOND timer is not available. IDLE/STAGE/STATEMENT/TRANSACTION events in the performance_schema will not be timed. MY-011039,错误 Symbol:ER_MICROSECOND_TIMER_IS_NOT_AVAILABLE,错误 SQLSTATE:HY000,是 MySQL 版本所识别的标准错误之一,其出现的具体内容为:"MICROSECOND 定时器不可用”。这意味着操作出现了错误,因为尝试使用 MySQL 版本尚不支持 MICROSECOND 定时器的功能,导致无法执行。错误 MY-011039 常见的案例之一是用户可能会遇到的。某一 MySQL 版本的用户,尝试使用未支持的功能,比如 MySQL 版本 5 里尚不支持 MICROSECOND 定时器。如果用户照旧尝试使用这类功能,则 MySQL 可能会报出此错误。解决 MY-011039 这类错误,可採取如下操作:1. 检查 MySQL 版本,核实确实无法使用对应功能。2. 升级 MySQL 版本至支持欲使用功能的版本,重新编译服务器,便可恢复操作。3. 使用其他可用解决方案。有些功能,比如 MICROSECOND 定时器,可改用用户可以自行解决的方案,比如自行使用操作系统内置函数完成定时器功能。解决此类问题也可以联络 MySQL 官方支持,正确安全地尝试进行分析、解决或进行技术支持。(2025 年 7 月 5 日)
MySQL 5.7 Reference Manual
The performance_timers table shows which event timers are available: mysql> SELECT * FROM performance_schema . performance_timers ; + - - - - - - - - - - - - - + - - - - - - - - - - - - - - - - - + - - - - - - - - - - - - - - - - - - + - - - - - - - - - - - - - - - - + | TIMER_NAME | TIMER_FREQUENCY | TIMER_RESOLUTION | TIMER_OVERHEAD | + - - - - - - - - - - - - - + - - - - - - - - - - - - - - - - - + - - - - - - - - - - - - - - - - - - + - - - - - - - - - - - - - - - - + | CYCLE | 2389029850 | 1 | 72 | | NANOSECOND | 1000000000 | 1 | 112 | | MICROSECOND | 1000000 | 1 | 136 | | MILLISECOND | 1036 | 1 | 168 | | TICK | 105 | 1 | 2416 | + - - - - - - - - - - - - - + - - - - - - - - - - - - - - - - - + - - - - - - - - - - - - - - - - - - + - - - - - - - - - - - - - - - - + If the values associated with a given timer name are NULL , that timer is not supported on your platform. The rows that do not contain NULL indicate which timers you can use in setup_timers . For an explanation of how event timing occurs, see Section 25.4.1, "Performance Schema Event Timing" . Note As of MySQL 5.7.21, the Performance Schema setup_timers table is deprecated and is removed in MySQL 8.0, as is the TICKS row in the performance_timers table. The performance_timers table has these columns: TIMER_NAME The name by which to refer to the timer when configuring the setup_timers table. TIMER_FREQUENCY The number of timer units per second. For a cycle timer, the frequency is generally related to the CPU speed. For example, on a system with a 2.4GHz processor, the CYCLE may be close to 2400000000. TIMER_RESOLUTION Indicates the number of timer units by which timer values increase. If a timer has a resolution of 10, its value increases by 10 each time. TIMER_OVERHEAD The minimal number of cycles of overhead to obtain one timing with the given timer. The Performance Schema determines this value by invoking the timer 20 times during initialization and picking the smallest value. The total o(来自 2026 年 4 月 19 日的资料)
MySQL 故障排查全攻略:常见错误代码深度解析与实战指南
MySQL 故障通常可以分为几个主要类别:连接问题、查询执行错误、存储引擎异常、资源限制以及复制架构故障。连接问题可能源于网络配置错误或权限设置不当;查询错误往往与 SQL 语句的语法或逻辑有关;存储引擎异常则可能涉及死锁或数据文件损坏;资源限制包括内存、磁盘空间或线程数不足;而复制故障会影响数据同步和高可用性。每一类故障都可能以多种形式表现出来,但幸运的是,MySQL 通过系统化的错误代码机制,为快速定位问题提供了明确线索。错误代码:故障诊断的“语言”错误代码是 MySQL 在运行过程中遇到问题时返回的数字标识符,它们就像是数据库与运维人员之间的通用语言。每一个错误代码都对应着特定的问题场景,例如,1045 表示访问权限被拒绝,2003 指向连接失败,1064 标识 SQL 语法错误。这些代码不仅仅是简单的数字,而是包含了丰富的上下文信息,能够直接指引排查方向。错误代码通常由数字和有时伴随的文本消息组成。数字部分遵循一定的分类规则:客户端错误通常以 1 开头,服务器错误以 2 开头,而更具体的子类则通过后续数字细化。例如,1045 属于客户端错误中的权限相关问题,而 1213 则属于服务器端的存储引擎异常。这种结构化设计使得即使面对不熟悉的错误,也能通过代码范围快速判断问题类型。错误代码在快速诊断中的价值在故障发生时,时间往往是最大的敌人。错误代码的价值在于其能够极大缩短平均修复时间 (MTTR)。举个例子,当应用程序突然无法连接数据库时,如果日志中显示“错误 2003:无法连接到 MySQL 服务器”,管理员可以立即将排查重点放在网络连通性、防火墙规则或 MySQL 服务状态上,而不是盲目检查查询语句或数据表结构。这种精准的指向性避免了在无关领域的浪费时间。此外,错误代码通常与 MySQL 官方文档紧密对应。每一个代码都有详细的说明、可能的原因和解决建议,这为排查工作提供了权威参考。结合日志记录和监控工具,错误代码还能帮助构建历史故障模式,从而在问题复发时实现更快速的响应。(撰于 2025 年 11 月 28 日)
3.4 Troubleshooting a Microsoft Windows MySQL Server Installation
When installing and running MySQL for the first time, you may encounter certain errors that prevent the MySQL server from starting. This section helps you diagnose and correct some of these errors. Your first resource when troubleshooting server issues is theerror log. The MySQL server uses the error log to record information relevant to the error that prevents the server from starting. The error log is located in thedata directoryspecified in yourmy.inifile. The default data directory location isC:\Program Files\MySQL\MySQL Server 9.6\data, orC:\ProgramData\Mysqlon Windows 7 and Windows Server 2008. TheC:\ProgramDatadirectory is hidden by default. You need to change your folder options to see the directory and contents. For more information on the error log and understanding the content, seeSection 7.4.2, "The Error Log". For information regarding possible errors, also consult the console messages displayed when the MySQL service is starting. Use theSC STARTmysqld_service_nameorNET STARTmysqld_service_namecommand from the command line after installingmysqldas a service to see any error messages regarding the starting of the MySQL server as a service. SeeSection 2.3.3.8, "Starting MySQL as a Windows Service". The following examples show other common error messages you might encounter when installing MySQL and starting the server for the first time: If the MySQL server cannot find themysqlprivileges database or other critical files, it displays these messages: System error 1067 has occurred. Fatal error: Can't open and lock privilege tables: Table 'mysql.user' doesn't exist These messages often occur when the MySQL base or data directories are installed in different locations than the default locations (C:\Program Files\MySQL\MySQL Server 9.6andC:\Program Files\MySQL\MySQL Server 9.6\data, respectively). This situation can occur when MySQL is upgraded and installed to a new location, but the configuration file is not updated to reflect the new location. In addit(该信息的时间戳是 2026 年 4 月 13 日)
FAQ
为什么会出现 ER_MICROSECOND_TIMER_IS_NOT_AVAILABLE 错误?
因为 MySQL 版本或底层操作系统平台不支持微秒级定时器功能,导致 performance_schema 无法使用该计时器。
远程处理此类故障的第一步是什么?
第一步是检查 MySQL 错误日志,确认报错的具体上下文,并查看 performance_timers 表确认定时器支持情况。