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Module-Database-Oracle模块功能
配置优化 修改进程数量 默认 150 redo 默认 50M, 改成 100M 或更大,具体根据 redo 的量来设置 redo 每组默认 3 组每组一个成员,建议每组两个成员以上 设置 sga pga 大小 oltp 系统通常(要设置好,防止内存抖动) undo_retention ...
2021-10-23
module
Module-Database-Oracle使用文档
Oracle-index Oracle Docker-部署 Oracle 配置 Oracle 优化 环境说明: Oracle11g CentOS6.10/CentOS7.5 常用功能创建用户&授权Oracle 用户 123$sqlplus / as sysdbacreate user ...
2021-10-23
module
Oracle常用配置项
Oracle-常用配置 数据库自启动 配置项目环境(Oracle驱动) Oracel exp 导出空表数据 Oracle 数据导入导出 Oracle 密码到期修改 修改数据库进程数为 500 Oracle 配置上下左右退格键 Oracle 显示乱码 Oracle-知识概念 临时表 ...
2021-10-23
module
Module-Database-DB2使用文档
安装部署Docker 部署详见 Docker-Db2 宿主机部署参考链接: Linux 下 DB2 数据库安装过程详解 12345678910数据库配置创建数据库db2 create database 数据库名develop PAGESIZE 32 K #建立数据库develop,32K,默认建立1 ...
2021-10-23
module
Module-Database-Mysql部署文档
环境说明: Mysql CentOS6.10 Docker-Mysql详见 Docker-Mysql CentOS8.1.19CentOS8 安装 Mysql12345678910# 安装 mysql-python 驱动前置依赖, Python3连接Mysql使用PyMySQLsudo yum ...
2021-10-23
module
Database目录索引
文内资源 数据库 Oracle Oracle 配置 Oracle 优化 Mysql DB2 ...
2021-10-23
module
Re-正则表达式
正则表达式(Regular Expression)是一种文本模式,包括普通字符(例如,a 到 z 之间的字母)和特殊字符(称为”元字符”)。 正则表达式使用单个字符串来描述、匹配一系列匹配某个句法规则的字符串。 正则表达式样例 123456789import re# 只匹配中文字符r = re.co ...
2021-10-23
大文件断点续传功能
由于普通下载时,文件会缓存在内存中,当文件大小超过内存时,会报内存溢出错误,从而下载失败。 12345678910import requests# stream=True 客户端不会立即下载文件的内容,但客户端与服务端会持续建立 HTTP 连接with requests.get(url, strea ...
2021-10-23
Xpath
123456789101112131415161718192021222324from lxml import etreeweb_data="xxxx<div>xxx</div>"html = etree.HTML(web_data)# 打印htmlres ...
2021-10-23
crawl-lawer
爬虫究竟是合法还是违法的 https://mp.weixin.qq.com/s/rO24Mi5G5IAVqEnHu-JLaQ ...
2021-10-23
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