linux performance tuning books

The original address of this article is here: http://www.percona.com/blog/2007/11/01/innodb-performance-optimization-basics/, here is the translation. -----------------------------------------------------------This is a split line------------------------------------------------------- ---- November1, 2007 by Peter Zaitsev Note: The advanced knowledge of this article is here: http://www.mysqlperformanceblog.com/2013/09/20/innodb-

improve performance. This is the default setting of True.Connectionlinger: The number of seconds to close when this connector will continue to use the socket. The default value is-1, which disables the socket delay time.Server: Hide Tomcat version information, first hide version information in HTTP header 6. Hide or modify the Tomcat version number # cd/usr/local/tomcat/lib/# Unzip Catalina.jar # CD Org/apache/catalina/util # VIM Serverinfo

, s3c2410 DatasheetBasic English　　1. "Computer and communication professional English"System Tutorials　　1, "Embedded system-architecture, programming and Design"　　2, "embedded system-the use of open source code and Strongarm/xscale processor" Maudeca Hu Himing　　3. "Building Embedded Linux Systems"Theoretical basis　　1, "Introduction to Algorithms"　　2, "Data structure (c language version)"　　3. "Computer Organization and Architecture"

performance analysis and tuning. Background knowledge Main methods of performance analysis Monitoring: Monitoring is a common way to view the run-time behavior of an application. There are often multiple views (view) that display CPU usage, memory usage, thread state, and other useful information in real time, so that users can quickly discover the key to the

xf master# cd major-mysqltuner-perl-993bc18/#./ mysqltuner.pl You will receive detailed reports and recommended tips for MySQL usage. The following is an example of the output from the default MariaDB installation: MySQL Performance Optimization 15. Optimize and Repair MySQL database Sometimes tables in the MYSQL/MARIADB database can easily crash, especially if the server shuts down unexpectedly, the file system suddenly crashes, or the database is

I started to write this post before weeks ago and finally publish it even if it's not totally finish. it is just a little feedback about tuning a full lamp server with some user traffic and services load. important thing to notice is that all stuff in this post isNot the solution. You will probably have to tune little more for adapt all this to your personal server usage, server load, development architecture. so, use those tips as a kind of inspirat

small portion of the outermost track of each hard drive as a swap partition. Swap partitions can be prioritized, so the swap memory priority of these drives is set to the same level, which results in a load balancing effect. The method for defining the interchange partition priority is to edit the/etc/fstab:/dev/sda1 SwapSwap pri=5 0 0/dev/sdb1 SwapSwap pri=5 0 0/dev/sdc1 SwapSwap pri=5 0 0/dev/sdd1 SwapSwap pri=5 0 0Four. Relevant tuning parameters

# The number of worker_processes should be no more than the number of cores of the server's CPU, # Each CPU core of more than 1 worker does not make nginx performance has any promotion worker_processes 4; # The number of file descriptors used for Nginx. This needs to be set up system kernel parameter ' ulimit-n 200000 ' or modify '/etc/security/limits.conf ', reference "High load Linux

: Specify MySQL server 's hostname, default is localhost-P/--port : Specify port to connect to MySQL server, default is 3306-S/--delay : Updated number of seconds, preset is 5 seconds-d/--db/--database : Specify connected repositories, default is test-b/--batch/--batchmode: Specified as batchmode, each update does not clear the old display results, the update data is displayed on the top, the preset is unset-S/--socket : Specifies to use mysqlsocket direct connection without TCP/IP connection,

Deploying Automatic System Tuning on Red Hat Linux With the promotion and application of open platform, the open operating system platform represented by Linux has become the preferred choice of system architecture. As a mature operating system, system monitoring optimization is an essential tool component of the Linux

One, Tomcat server 1, JVM parameter tuningThe startup parameters of Tomcat are located in the Tomcat directory \ Bin, if you are the Linux operating system is the catalina.sh file, if you are a Windows operating system then you need to change the Catalina.bat fileJAVA_OPTS="$JAVA_OPTS -server -Xms4096m -Xmx4096m -Xmn1024m -Xss256K -XX:+DisableExplicitGC -XX:MaxTenuringThreshold=15 -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:+CMSParallelRemarkEnabled

From a large perspective, Netty performance is mainly reflected in: 1.io threading Model using reactor mode, synchronous non-blocking. This determines that more can be done with the least amount of resources. 2. Memory 0 copies use direct caching 3. Memory pool design application memory can be reused, mainly direct memory. The internal implementation is to manage memory allocations with a binary lookup tree. 4. The serialization processing socket read

MONGODB1, MongoDB optimization: A, statement optimization may find a long execution time statement through the profile. Db.getProfiling.Level () to get the profile level Db.system.profile.find () to view the profile record. B, after finding the statement, through the explain to parse the statement, you can see whether the index is used, what index? Db.collection.find ({xx:xx}). Explain (); C, through the results of explain to optimize the query statement. 2, MongoDB connection number: If the lar

automatically.Adjusting the CPU operating mode1, adjust the overall working modeCPUFREQ-SET-G Performance2, manual No. 0 core of the specified maximum frequency and minimum frequencyCpufreq-set-c 0-g userspace-d 180000-u 240000How to use commandsUsage:cpufreq-set [Options] Options:-C CPU,--CPU CPU #指定CPU核心号请注意的analyzing CPU number.-D FREQ,--min FREQ #手工指定最小主频速度. In the userspace policy-U FREQ,--max FREQ #手工指定最大主频速度. In the userspace policy-G gov,--governor gov #设置工作策略-F FREQ,--freq FREQ #设定特定的工

(unless the kernel is recompiled), and after 25, the kernel exports a SYS interface to modify the maximum value/proc/sys /fs/nr_open. The shell cannot be changed directly, because Pam has set the upper limit from limits.conf when logging in, the Ulimit command can only play within the range below the upper limit. View the socket status in Linux:Cat/proc/net/sockstat # (This is IPv4 's)Sockets:used 137Tcp:inuse Orphan 0 tw 3272 alloc mem 46Udp:inuse 1 Mem 0Raw:inuse 0Frag:inuse 0 Memory 0Descrip

The Linux kernel parameters are placed under/proc, and the system parameters are placed in the/proc/sys Swap is best placed on the fastest running hard drive, but swap and can replace RAM, because of the loss of I/O, it is preferred to verify that the memory is not compromised and increase memory to improve performance; , so that the Linux system can be multi-t

, (Shell loop): [[Email Protected]_slave1~]# forRichyinch' Chkconfig--list |grep"3:on"|awk'{print $}'|grep-ve"Crond|network|sshd|rsyslog|sysstat"`; Dochkconfig $richy off;d one[[email protected]_slave1~]# chkconfig--list |grep"3:on"Crond0: Off1: Off2: On3: On4: On5: On6: Offnetwork0: Off1: Off2: On3: On4: On5: On6: Offrsyslog0: Off1: Off2: On3: On4: On5: On6: Offsshd0: Off1: Off2: On3: On4: On5: On6: Offsysstat0: Off1: On2: On3: On4: On5: On6: Off4. Close Iptables FirewallIn the daily work, gene

Scales with thread count –each thread runs on 100% CPU utilsation, and XFS gets up to 3 X as much throughput as EXT4 does. So, basically, XFS are still the file system you want for direct IO.Optimized for hanging files (noatime,nodiratime):Mount–t Ext4–o Rw,noatime,nodiratime/dev/sda6/dataNoatime will have a 0-10% performance boost, typically with an average of 3% performance gains.noatime:Do not update t

For Linux system tuning parameters, all TCP/IP tuning parameters are located in the/proc/sys/net/directory. For example, the following are some of the most important tuning parameters, and their meanings are as follows: 1./proc/sys/net/core/rmem_max mdash; maximum TCP data receiving buffer 2,/proc/sys/net /... for

cannot be used will use the kernel as the cache of the file system (5) When more memory is needed, the Linux system uses swap. For example, it requires more memory than the physical memory. It switches the smallest page in the memory from the physical memory to the disk. (6) Too many exchanges may cause performance problems because the disk is much slower than the physical memory, and it takes time to swit