search
HomeDatabaseMysql TutorialInformix 11.70系统管理: 系统活动监视

在本教程中,您将学习 IBM Informix 数据库工具、监视数据库的实用程序,以及如何诊断问题。学习如何使用系统监视接口 (SMI) 和 SQL 管理 API。本教程帮助您准备参加 Informix v11.70 的系统管理认证考试 919 的第 3 部分。

正在考虑获得 Informix 11.70 版本的系统管理认证(考试 919)吗?如果是,那么您来对地方了。这个 Informix 认证准备系列 涵盖了您在参加考试前需要理解的所有主题。即使您目前没有获取认证的想法,这一系列仍然是您开始了解 Informix 11.70 中的新功能的不错地方。

关于本教程

在本教程中,您将学习如何使用一组 Informix 监视工具来监视和诊断问题。此处提供的材料主要涵盖考试第 2 部分(名为 “系统活动监视”)中的目标。本教程涵盖的主题包括:

  • 使用系统监视和隔离问题
  • 消息日志
  • 使用 Informix 实用程序查看有关数据库的信息
  • 使用 Scheduler 和 SQL Administration API 查看有关数据库服务器的信息
  • 并发性和锁定
  • 操作系统工具

目标

完成本教程后,您应该知道:

  • 如何使用 sysmaster 数据库
  • 要在消息日志中查找哪些内容
  • 如何使用 onstat 和 oncheck 实用程序
  • 如何使用 dbschema 实用程序
  • 如何使用调度程序
  • 如何使用 SQL Administration API
  • 不同类型的锁
  • 如何使用操作系统工具进行监视

前提条件

要理解本教程中提供的材料,您应该熟悉以下内容:

  • Informix 环境,包括配置文件、参数、安装和管理
  • Informix 概念和术语,包括 dbspace、数据块、物理日志、逻辑日志和检查点

系统需求

您不需要 Informix 副本即可完成本教程。但是,如果您 来完成本教程的学习,您将会更好地掌握本教程。

使用系统数据库监视和隔离问题

数据库服务器创建和维护 sysmaster 数据库。它类似于数据库的系统目录,系统目录已在 IBM Informix Guide to SQL: Reference 中介绍过。就像数据库服务器管理的每个数据库的系统目录跟踪数据库中的对象和特权一样,每个数据库服务器的 sysmaster 数据库会跟踪有关数据库服务器的信息。

sysmaster 数据库包含系统监视接口 (SMI) 表。SMI 表提供有关数据库服务器的状态信息。您可以查询这些表来识别处理瓶颈,确定资源使用情况,跟踪会话或数据库服务器活动等。本文将介绍这些 SMI 表,这些表与普通的表稍有不同。

sysmaster 数据库中有许多表。请查阅手册了解详细信息。表 1 给出了 Informix 版本 11 中引入的一组新表。


表 1. 新的 sysmaster 表

表名称 说明
sysbaract_log OnBar 活动日志文件
syscheckpoint 检查点信息
syscluster 高可用性集群信息
syscmsmsla 连接管理器信息
syscmsmtab 连接管理器信息
syscompdicts_full 压缩字典信息
sysdual 一个只有一行的表
sysenv 在线服务器的启动环境
sysenvses 会话级环境变量
sysha_lagtime 从属服务器延迟时间统计信息
sysha_type 有关连接的服务器的信息
sysha_workload 从属服务器工作负载统计信息
sysipl 索引页面日志信息
sysmgminfo 内存授权管理器/并行数据查询信息
sysnetclienttype 客户端类型网络活动
sysnetglobal 全局网络信息
sysnetworkio 网络输入/输出
sysonlinelog 在线日志信息
sysprofile 系统配置文件信息
sysrsslog RS 从属服务器信息
sysrstcb 改进了对输入/输出和锁定等待信息的查看
sysscblst 改进了对会话使用的内存的查看
syssqlcacheprof 有关每个 SQL 缓存的配置文件信息
syssqltrace SQL 语句信息
syssqltrace_info SQL 配置文件跟踪系统信息
syssqltrace_iter SQL 语句迭代器
syssrcrss RS 从属服务器统计信息
syssrcsds SD 从属服务器统计信息
systcblst 修改现有的表以添加等待统计信息
systrgrss RS 从属服务器统计信息
systrgsds SD 从属服务器统计信息

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
MySQL: BLOB and other no-sql storage, what are the differences?MySQL: BLOB and other no-sql storage, what are the differences?May 13, 2025 am 12:14 AM

MySQL'sBLOBissuitableforstoringbinarydatawithinarelationaldatabase,whileNoSQLoptionslikeMongoDB,Redis,andCassandraofferflexible,scalablesolutionsforunstructureddata.BLOBissimplerbutcanslowdownperformancewithlargedata;NoSQLprovidesbetterscalabilityand

MySQL Add User: Syntax, Options, and Security Best PracticesMySQL Add User: Syntax, Options, and Security Best PracticesMay 13, 2025 am 12:12 AM

ToaddauserinMySQL,use:CREATEUSER'username'@'host'IDENTIFIEDBY'password';Here'showtodoitsecurely:1)Choosethehostcarefullytocontrolaccess.2)SetresourcelimitswithoptionslikeMAX_QUERIES_PER_HOUR.3)Usestrong,uniquepasswords.4)EnforceSSL/TLSconnectionswith

MySQL: How to avoid String Data Types common mistakes?MySQL: How to avoid String Data Types common mistakes?May 13, 2025 am 12:09 AM

ToavoidcommonmistakeswithstringdatatypesinMySQL,understandstringtypenuances,choosetherighttype,andmanageencodingandcollationsettingseffectively.1)UseCHARforfixed-lengthstrings,VARCHARforvariable-length,andTEXT/BLOBforlargerdata.2)Setcorrectcharacters

MySQL: String Data Types and ENUMs?MySQL: String Data Types and ENUMs?May 13, 2025 am 12:05 AM

MySQloffersechar, Varchar, text, Anddenumforstringdata.usecharforfixed-Lengthstrings, VarcharerForvariable-Length, text forlarger text, AndenumforenforcingdataAntegritywithaetofvalues.

MySQL BLOB: how to optimize BLOBs requestsMySQL BLOB: how to optimize BLOBs requestsMay 13, 2025 am 12:03 AM

Optimizing MySQLBLOB requests can be done through the following strategies: 1. Reduce the frequency of BLOB query, use independent requests or delay loading; 2. Select the appropriate BLOB type (such as TINYBLOB); 3. Separate the BLOB data into separate tables; 4. Compress the BLOB data at the application layer; 5. Index the BLOB metadata. These methods can effectively improve performance by combining monitoring, caching and data sharding in actual applications.

Adding Users to MySQL: The Complete TutorialAdding Users to MySQL: The Complete TutorialMay 12, 2025 am 12:14 AM

Mastering the method of adding MySQL users is crucial for database administrators and developers because it ensures the security and access control of the database. 1) Create a new user using the CREATEUSER command, 2) Assign permissions through the GRANT command, 3) Use FLUSHPRIVILEGES to ensure permissions take effect, 4) Regularly audit and clean user accounts to maintain performance and security.

Mastering MySQL String Data Types: VARCHAR vs. TEXT vs. CHARMastering MySQL String Data Types: VARCHAR vs. TEXT vs. CHARMay 12, 2025 am 12:12 AM

ChooseCHARforfixed-lengthdata,VARCHARforvariable-lengthdata,andTEXTforlargetextfields.1)CHARisefficientforconsistent-lengthdatalikecodes.2)VARCHARsuitsvariable-lengthdatalikenames,balancingflexibilityandperformance.3)TEXTisidealforlargetextslikeartic

MySQL: String Data Types and Indexing: Best PracticesMySQL: String Data Types and Indexing: Best PracticesMay 12, 2025 am 12:11 AM

Best practices for handling string data types and indexes in MySQL include: 1) Selecting the appropriate string type, such as CHAR for fixed length, VARCHAR for variable length, and TEXT for large text; 2) Be cautious in indexing, avoid over-indexing, and create indexes for common queries; 3) Use prefix indexes and full-text indexes to optimize long string searches; 4) Regularly monitor and optimize indexes to keep indexes small and efficient. Through these methods, we can balance read and write performance and improve database efficiency.

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Dreamweaver Mac version

Dreamweaver Mac version

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

EditPlus Chinese cracked version

EditPlus Chinese cracked version

Small size, syntax highlighting, does not support code prompt function

MinGW - Minimalist GNU for Windows

MinGW - Minimalist GNU for Windows

This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

SecLists

SecLists

SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.