Memory structure of Dameng database

Memory structure SQL buffer: explain It is used to store SQL statements, execution plans and result sets. The default result set is closedCACHE_POOL_SIZE: the default value is 200. For complex systems with many SQL types and Pkgs, it is recommended to increase this parameter select * from v$parameter where name = 'CACHE_POOL_SIZE'; --0 ...

Posted by fitzsic on Sat, 23 Apr 2022 10:38:54 +0300

Thread foundation of Linux C/C + +

catalogue 1. What is a thread 1.1 process and thread 1.2 threads 1.3 development history of threads 2. How to create and use threads 2.1 pthread_ The create function creates a thread 2.2 pthread_ Use of the create function 2.3} when the main thread ends, the branch thread will also end 2.4) multiple threads in the same process sha ...

Posted by denzlite on Sat, 23 Apr 2022 09:44:56 +0300

Raspberry pie 3B+ Debain 10(Buster) system uses opencv+pyzbar for QR code recognition

Raspberry pie 3B+ Debain 10(Buster) system external camera opencv+pyzbar for QR code recognition The following are based on Python 3 7.3,Opencv3.2.0. The software corresponding to Python 3 is pyzbar, and the software corresponding to Python 2 is zbar. Don't install it wrong, because 3 doesn't support zbar. Many tutorials still talk about zbar, ...

Posted by xeonman13 on Sat, 23 Apr 2022 09:16:05 +0300

Building ntp time synchronization service on linux

1. Introduction to NTP NTP (Network Time Protocol) is a protocol used to synchronize computer time. It can make the computer synchronize its server or clock source, and it can provide high-precision time correction (the difference between LAN and standard is less than 1 millisecond, and tens of milliseconds on WAN). For the server cluster, thi ...

Posted by berbbrown on Fri, 22 Apr 2022 06:25:26 +0300

Logiops installation and using logiops in ubuntu to customize buttons and gestures for Logitech mouse

Information: ubuntu20.04 Version of logid installed after compilation: v0 2.2-70-gdbe2b28 install Refer to the official website tutorial: https://github.com/PixlOne/logiops cmake in Stage, error reporting: CMake Error at CMakeLists.txt:5 (project): No CMAKE_CXX_COMPILER could be found. Tell CMake where to find the compiler by setting ...

Posted by 2RIP on Thu, 21 Apr 2022 22:33:43 +0300

ssh Remote Access and control

introduction Today, I'll teach you the operation of ssh Remote Management and how to configure the key. 1, SSH service 1.1 SSH server SSH (Secure Shell) is a secure channel protocol, which is mainly used to realize the functions of remote login and remote replication of character interface SSH protocol encrypts the data transmission be ...

Posted by alexk1781 on Thu, 21 Apr 2022 16:45:33 +0300

Common data structure summary and analysis, an article for you to solve

1. Several common data structures Here we mainly summarize several data structures often encountered in work: Array, ArrayList, list < T >, LinkedList < T >, queue < T >, stack < T >, dictionary < K, t > Array: Array is the simplest data structure. It has the following characteristics: Arrays are stored in c ...

Posted by xisle on Thu, 21 Apr 2022 15:19:34 +0300

Binary installation Kubernetes (k8s) v1 23.6 ---

Continued abovekubernetes binary installation1.23.3 and 1.23.4 and 1.23.5 and 1.23.6 documents and installation packages have been generated.Later, update the new version of the document as soon as possiblehttps://github.com/cby-chen/Kubernetes/releasesScript project address: https://github.com/cby-chen/Binary_installation_of_KubernetesManual p ...

Posted by madmax on Thu, 21 Apr 2022 12:41:06 +0300

Binary installation Kubernetes (k8s) v1 23.6 ---

backgroundkubernetes binary installation1.23.3 and 1.23.4 and 1.23.5 and 1.23.6 documents and installation packages have been generated.Later, update the new version of the document as soon as possiblehttps://github.com/cby-chen/Kubernetes/releasesScript project address: https://github.com/cby-chen/Binary_installation_of_KubernetesManual projec ...

Posted by Popgun on Thu, 21 Apr 2022 12:41:23 +0300

Linux Summary - users and groups

2019-07-12 17:53:04 User and group relationships In Linux system, user groups are divided into main group and subsidiary group. A user has only one primary group and can have multiple subordinate groups; A group can be used as the primary group of multiple users and as the subsidiary group of multiple users; Personally, the significance of the ...

Posted by spillage on Thu, 21 Apr 2022 10:33:14 +0300