Tags: mysql service disk IO high problem analysisMYSQLDatabase service DiskIOhigh problem analysis and optimization in the process of stress testing, if the most direct performance problem caused by the resource use bottleneck is that the business transaction response time is too large,TPSgradually reduced and so on. In the case of problem locating analysis, the most priority is to monitor server resource
A disk is usually the slowest subsystem of a computer, and it is also the most prone to performance bottlenecks, because the disk is the farthest from the CPU and the CPU access to the disk involves mechanical operations, such as rotating shafts and track searching. The speed difference between hard disk access and mem
UNIX disk I/O benchmarks
FIO-New!
FIO is an I/O tool meant to be used both for benchmark and stress/hardware verification. it has support for 13 different types of I/O engines (sync, MMAP, libaio, posixaio, SG V3, splice, null, network, syslet, guasi, solarisaio, and more ), i/O priorities (for newer linux kernels), rate I/O, forked or threaded jobs, and much more. it supports Linux, FreeBSD, NetBSD, OS X, opensolaris,
Core : Almost all data in scom is stored in DB;difficulties : DB table structure, field Association, multi-Table association;scenario: obtained from DB;In general, if you are only looking for data, because the Management Pack comes with these monitors, simply view the appropriate dashboard directly from the Scom console, with the tree node path as follows: "Monitoring-microsoftwindows server-Health monitoring
so bi bo in CS US sy ID WA St 0 0 0 2037916 105012 725188Want to see clearly some can add-s back with K M$ vmstat-s mprocs-----------memory-------------Swap-------io------System-------CPU-----r B swpd free buff cache si so bi bo in CS US sy ID WA St 0 0 0 1903 104 723 0 0 207 613 5 2 2 0six dstat powerful network disk CPU
procs-----------memory-------------Swap-------io------System-------CPU-----r B swpd free buff cache si so bi bo in CS US sy ID WA St 0 0 0 2037916 105012 725188Want to see clearly some can add-s behind with K M$ vmstat-s mprocs-----------memory-------------Swap-------io------System-------CPU-----r B swpd free buff cache si so bi bo in CS US sy ID WA St 0 0
procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu----- r b swpd free buff cache si so bi bo in cs us sy id wa st 0 0 0 2037916 105012 725188 0 0 63 18 206 589 5 2 92 2 0For more information, see-S and k m.
$ vmstat -S Mprocs -----------memory---------- ---swap-- -----io---- --system-- -----cpu----- r b swpd free buff cache
Tags: des style blog HTTP Io color ar OS usage The following performance counters can be used to monitor disk I/O activities:
Counter name
Description
AVG. Disk SEC/read
Shows the average time, in seconds, of a read of data from the disk.
AVG.
data, empirical data, and disk nominal values, it is not difficult to identify potential or already occurring problems with disk I/O when necessary, using the CPU, memory, and swap partitions. But how to avoid and solve these problems? This requires knowledge and technology for disk I/O performance optimization. Limited to the topic and length of this article, o
Monitoring and Analysis of disk I/O performance in Linux 18:10:23Tags: Performance Monitoring Analysis
Linux
Disk Io
Leisure
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In the past two days, I found that a serve
Disk I/O performance is an important indicator to measure the overall performance of computers. Linux provides the iostat command to obtain disk input/output (I/O) statistics, while Windows provides the WMI interface, you can write a simple script to obtain functions equivalent to iostat.
1. Linux iostat command
Iostat-D-K-T 2
Calculate the disk
0. PrefaceIf the data is read/written from disk, the CPU is idle, wasting the compute power of this wait time CPU. So the SSD, cache, memory, register and so on is designed to reduce the CPU waiting time, the release of computing power. The industry's attention to disk I/O and the impact of disk I/O on the system can be seen. I. How to view
Rationale: Through analysis /proc/diskstats files to monitor the performance of the IO. The explanations are as follows:+++++++++++++++++++++++++++ 's explanation of/proc/diskstats ++++++++++++++++++++++++++++++++++++++++++++[email protected] bin]# cat/proc/diskstats | grep SDA | Head-18 0 SDA 73840 10263 3178156 91219 1110085 4192562 42423152 1275861 0 447798 1366379First to third domain, respectively, main device number, secondary device number, dev
First of all, it is necessary to introduce the use of RAID card, about the cache problem also has a personal understanding: the production system of the physical disk configuration is mostly RAID5, before the frequent encounter disk IO at some time extremely slow to keep pace, a little write volume, disk Utils can soar
Article Title: ubuntu CPU temperature configuration. fan speed, hard disk temperature monitoring. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.
Some friends on the forum could not monitor the hardware status by using the sensor on the motherboard after installing Ubunt
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