elasticsearch performance tuning

Tags: non-homogeneous project distribution tuning hold writes merge partitions multiple timesReprinted from XiaoruiSome users (especially the external output) when using Maxcompute (original ODPs), due to the use of the product level and level of understanding of the level of implementation, resulting in the implementation of the task is too long, the occupation of more cluster resources, serious will lead to failure, not only need to invest support s

different tables or libraries)Five, server side and client interaction optimization:Client tries to reduce requestsLogical processing of the service side as long as possibleServer-side and client-driven push-pull combination (can take advantage of some synchronization mechanisms)Optimization of communication protocols. (Reduce the size of the message)Power usage optimization (try not to use background execution)Vi. Non-technical performance optimizat

IIS Performance Tuning 1. Adjust the IIS cache The range of HKEY_LOCAL_MACHINE Systemcurrentcontrolsetservicesinetinfoparametersmemorycachesize Memorycachesize is from 0 4GB, The default value is 3072000 (3MB). In general, this value should be set to 10% of the server memory. IIS improves system performance by caching system handles, directory listings, and oth

Detailed configuration: port= "protocol=" "http/1.1"connectiontimeout= "20000"redirectport= "8443"/> 1, Tomcat's external tuningJava Virtual Machine (JVM) performance optimization allows you to set the size of the virtual machine using memory,-xmsThe size of these two values is generally set as needed. The size of the initialization heap performs the size of the memory that the virtual machine requests to the system at startup. Generally speaking, th

should precede the phrase with parentheses and precede the phrase with the NOT operator. The NOT operator is included in another logical operator, which is the not equal to (... where status For this query, it can be rewritten to not use not:SELECT * FROM employee where salaryAlthough the results of these two queries are the same, the second query scenario is faster than the first query scenario. The second query allows Oracle to use indexes on salary columns, while the first query cannot use i

Hard Canton: "iOS Performance Tuning Series" The third, continuously updated, welcome attention.iOS Performance Tuning series: Analyze static analysis describes how to find iOS memory leaks using the static analysis method, iOS Performance

Hard Canton: "iOS Performance Tuning Series" fourth, is expected to be more than 20, continuously updated, welcome attention.Top two iOS Performance Tuning series: Analyze static Analysis, iOS Performance Tuning series: using inst

analyze and think twice before designing a ccbpm model for any business scenario integration. the correct usage of ccbpm is well known ented at http://help.sap.com. model Design palys a very important role on the performance of the business scenario in the Integration Server. A bad ccbpm design can have various perfromance issues in various runtime components (ie, AE, BPE ). note that every message entering the BPE is duplicated and every message lea

IOS Performance Tuning series: use Allocation to dynamically Analyze memory usage and optimize allocation Hardware wide: article 3 of the IOS Performance Tuning series, which is continuously updated. IOS Performance Tuning series:

Recently, due to Project Memory leakage, large-scale JVM performance tuning has been performed. , Now we will record the experience. I. JVM Memory Model and garbage collection Algorithm 1. According to the Java Virtual Machine specification, JVM divides the memory: New (young generation) Tenured (elder generation) Permanent generation (Perm) Among them, new and tenured are heap memory. The heap memory

monitor local and remote Java processes, including monitoring memory, threading, method execution time, and more.3-1 monitoring local Java processes3-2 monitoring the remote Java process4th chapter monitoring and debugging based on BtraceThis chapter takes you to learn how to install Btrace, how to write btrace scripts to monitor and debug the code in a production environment, such as obtaining parameters, return values, exceptions, line numbers, and so on for a method in a production environme

means a survivor area consumes 1/8 of Eden memory, or 1/10 of the Cenozoic memory) PermSize = 268435456 (256.0MB) # #perm区大小 MaxPermSize = 268435456 (256.0MB) # #最大可分配perm区大小Heap Usage: # #堆使用情况New Generation (eden + 1 Survivor space): # #新生代 (Eden District + survior) capacity = 322109440 (307.1875MB) # #新生代容量307M used = 226237024 (215.75643920898438MB) # #已经使用大小215M free = 95872416 (91.43106079101562MB) # #剩余容量91M 70.23607380150051% used # #使用比例70%eden

indexes are fully utilized during execution. normally, if the index is fully utilized, the name of the execution step will be index seek. note: When analyzing Io, You need to execute the set statistics Io on statement to open the IO analysis.4. Based on the analysis results, add the corresponding indexes and reduce the I/O later.5. for stored procedures, the event viewer should be used to further filter their information. If spid is used (which can be obtained through select @ spid), then the m