file system cache

1. clock speed The clock speed is also called the clock frequency. The unit is MHz, which indicates the computing speed of the CPU. CPU clock speed = frequency X frequency doubling coefficient. Many people think that the clock speed determines the

Mysql first-recognized log file article bitsCN.com Log files first recognized by mysql Log files 1. err log The error log records all severe warnings and error messages during mysql running, as well as detailed information about each mysql

Talking about linux performance tuning 13: performance analysis concepts; talking about linux performance tuning 12: Red Hat optimization strategy Tuned http://www.2cto.com/os/201307/229281.html About the performance metrics of the processor .? CPU

IntroductionIt is well known that traditional disk I/O is a relatively lossy performance, and optimizing system performance often requires dealing with disk I/O, while disk I/O latency is determined by the following 3 factors: Seek time

Kafka is a distributed publish-subscribe messaging system. It was originally developed by LinkedIn and later became part of the Apache project. Kafka is a distributed, partitioned, redundant backup of the persistent log service. It is primarily used

How does a computer get on the run"How the program runs.""Computer assembly and hardware repair from the beginning to mastery""Self-cultivation of programmers"Three principles of computer.1. A computer is a machine that performs input, arithmetic,

Kafka is a distributed publish-subscribe messaging System . It was originally developed by LinkedIn and later became part of the Apache project. Kafka is a distributed, partitioned, redundant backup of the persistent log service. It is primarily

Guided operation against excessive disk IO load in the systemMain commands:echo deadline >/sys/block/sda/queue/schedulerNote: The following content is only to provide a reference, if the disk IO is indeed relatively large, is the database, can be

This article mainly introduces the "Universal-image-loader Analysis (a)--imageloaderconfiguration detailed configuration", mainly related to Universal-image-loader analysis (a)-- Imageloaderconfiguration detailed configuration of the content, for

This article describes how to set the environment variables in the mysql database and how to set the environment variables of the mysql database. if you need them, refer to mysql environment variable settings (windows environment) 1. for command

MySQL environment variable settings (Windows environment) 1, for Command control, in the CMD command downstream operation is very convenient, but sometimes need to directly in the command line bed empty execution mysql Such a command, there will be

Disk I/O performance metrics and tuning method bitsCN.com Before introducing the disk I/O monitoring command, we need to understand the disk I/O performance monitoring metrics, as well as the disk performance of each indicator. Disk I/O performance

The difference between buffer and cache in the linuxfree command ~ $ FreetotalusedfreesharedbufferscachedMem: 1025204981636435680... information & nbsp; | & nbsp; difference between buffer and cache in linux free command ~ $ Free total used free

Detailed description of database paging, memory, and IO latency I wrote an article on AIX optimization a few years ago. now I see it in AIX 7, therefore, it is necessary to review the basic tuning measures that need to be performed on the AIX system.

All-Around system monitoring tool dstat 1. what is dstat? With man help, we can see that the official definition of dstat is: versatiletoolforgeneratingsystemresourcestatistics ). The information obtained is similar to dstat, an all-around System

Used to obtain information about processes, virtual storage, paging space, and CPU activity in UNIX systems. This information reflects the load situation of the system. Vmstat displays statistics from the start of the system startup at the first run,

Drdb Introduction:Data synchronization between high-availability servers Distributed replicated Block Divice (DRDB)software based on block devices synchronizing and mirroring data between different high-availability servers enables real-time or

Game resource files and common compressed files, such as WinZip and WinRAR, contain small files. This resource file is like a large box where a large number of different items can be stored, and each item type is different. The game resource file is

Top view memory is the memory occupied by the current process, excluding the memory occupied by the file system cache The process in the running queue occupies memory. Free memory is the remaining physical memory Who is using the remaining memory?

Windows Cache Extension for PHP are a PHP accelerator that's used to increase the speed of PHP applications running on Win Dows and Windows Server. Once the Windows Cache Extension for PHP are enabled and loaded by the PHP engine, PHP applications