oracle performance tuning guide

Https://github.com/Findow-team/Blog/issues/11?utm_source=tuicoolutm_medium=referral2017 front-end Performance tuning checklistHave you started using progressive start? Have you already used tree-shaking and code-splitting two tools in react and angular? Have you used compression techniques such as Brotli, Zofli, and Hpack, or the OCSP Protocol (online Certificate status protocol)? Do you know about resource

SQL _PLAN_BASELINE View: SELECT SQL_HANDLE, PLAN_NAME, ENABLED, ACCEPTED, FIXED FROM DBA_SQL_PLAN_BASELINES; SQL_HANDLE PLAN_NAME ENA ACC FIX------------------------------------------------------------------------SYS_SQL_209d10fabbedc741 SYS_SQL_PLAN_bbedc741a57b5fc2 YES NO NOSYS_SQL_209d10fabbedc741 SYS_SQL_PLAN_bbedc741f554c408 YES YES NO 6. SQL Management Base SQL Management Base (SMB) is part of the data dictionary that resident the SY

Xgboost parameter Tuning Complete guide (Python code included): http://www.2cto.com/kf/201607/528771.htmlhttps://www.zhihu.com/question/41354392"The following turns to self-knowledge" https://www.zhihu.com/question/45487317 why XGBOOST/GBDT in the parameter when the depth of the tree can be very little to achieve high precision?When participating in the Kaggle, use the XGBOOST/GBDT to tune the maximum depth

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JVM heap memory layout:Can be seen:Heap memory = young generation + old generation + permanent generation young generation = Eden Zone + two survivor zones (from and to)Now to explain the meaning of each column:s0c, s1c, s0u, S1u:survivor 0/1-zone capacity (capacity) and usage (used) EC, Eu:eden area capacity and usage oc, OU: Old generation capacity and Usage pc, PU: Permanent generation capacity and usage ygc, YGT: Young generation GC times and GC time-consuming FGC, fgct:full GC times, and f

@ linuxidc ~] # Vim/etc/tuned/wonderprofile/tuned. conf[Root @ linuxidc ~] # Tuned-adm profile wonderprofile For example, in the/etc/tuned/wonderprofile/tuned. conf file, make a few adjustments to it. [Main]Include = throughput-performance[Sysctl]Net. ipv4.tcp _ rmem = "4096 87380 16777216"Net. ipv4.tcp _ wmem = "4096 16384 16777216"Net. ipv4.udp _ mem = "3145728 4194304 16777216" Also adjust/etc/tuned/wonderprofile/script. sh. #! /Bin/sh# Lots of fu

In the case of performance problems with Oracle databases, it is less effort to use Oracle's own toolkit to give reasonable tuning recommendations.Tuning Advisor is optimized for the execution plan of the input SQL setThe Accsee Advisor is a recommendation on how much performance is improved if SQL set is introduced in

Oracle Objective Over the past decade, Oracle has become one of the most professional databases in the world. For IT professionals, it is important to ensure that Oracle's powerful features are used to improve the productivity of their companies. One of the most effective ways to do this is through Oracle tuning. It h

Chapter 2 procedural performance tuning of PL/SQL applications I. Reasons for PL/SQL Performance problems When the execution efficiency of PL/SQL-based applications is low, it is usually caused by poor SQL statements and programming methods, poor understanding of PL/SQL basics or misuse of shared memory. Bad SQL statements in PL/SQL PL/SQL programming see

), or (or), and not (non). Not can be used to negate any logical operation symbol. The following is an example of a NOT clause: ... where not (status = ' VALID ') If you want to use not, you 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 salary Although the results of thes

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 salar

16.1 Performance Tuning theory 16.1.1 Basic Concepts Resources (Resource): The functional components of the physical server, some software resources can also be measured, such as thread pool, number of processes, and so on. System operation, requires a variety of resources, for the determination of the list of resources, we can rely on the understanding of the system to determine, you can also draw the sy

Although the WebLogic version has now been upgraded to 10.3 and is packaged as Oracle Funsion middleware 11g, the new data is relatively small, sharing a WebLogic Classic version 8.1 performance tuning article. --------------------------------------------------------------------------------------------------------------- ---- Any successful product in the market

. Prior to CentOS 6 The name of this service was syslog.3 "Network: When the system starts, you should consider turning on this service if you want to activate/deactivate each of these interfaces.4 "Crond: This service is used for periodic execution of the system and User configuration of the task plan, have to periodically perform tasks, it is necessary to open.5 Sysstat: is a package that contains a set of tools for detecting system performance and

The last 2 months have been doing mobile phone and TV development, the development process encountered a variety of pits. Get fast New Year's day, finally put on the line. 2 months to dry down full of hard work, not so busy with their own preparation of the front-end performance tuning summary below, in order to facilitate the use of their own once again to be handy. Referring to the high-

The SQL Tuning toolset (SQL Tuning set,sts) is an integral part of the Oracle 10g SQL Tuning Advisor feature. Each tuning toolset contains one or several SQL statements, as well as the contextual information needed to properly interpret them. SQL