pg_database_size(oid) bigint 指定OID的数据库使用的磁盘空间 pg_database_size(name) bigint 指定名称的数据库使用的磁盘空间 pg_indexes_size(regclass) bigint 关联指定表OID或表名的表索引的使用总磁盘空间 pg_relation_size(relation regclass, fork text) bigint 指定OID或名的表或索引,通过指定fork('m...
This post will present a thorough understanding of pg_database_size(), pg_relation_size(), and pg_size_pretty() functions with examples. How to Find the Database Size Using pg_database_size? Use the pg_database_size() function to get the Database size. The syntax of the pg_database...
(1 row) postgres=# select * from pg_replication_slots; slot_name | plugin | slot_type | datoid | database | temporary | active | active_pid | xmin | catalog_xmin | restart_lsn | confirmed_flush_lsn | wal_status | safe_wal_size | two_phase ---+---+---+---+---+---+...
port= 5432# 端口max_connections = 9999# 最大连接数superuser_reserved_connections = 10#给超级用户预留的连接数shared_buffers = 16GB# 共享内存,一般设置为内存的1/4effective_cache_size = 2GB# 查询优化器估计的可用于缓存数据文件系统的总内存量,max_worker_processes = 48# 最大工作线程,和cpu核数一致...
pg中的page和Oracle中的数据块一样,指的是数据库的块,操作系统块的整数倍个,默认是8K也就是两个操作系统块(4k的文件系统块)。这个大小在pg编译安装configure的时候通过--with-blocksize参数指定,单位是Kb。 二、Page的内部结构 2.1 page结构 2.2 PageHeaderData数据结构(页头) ...
Create an example database Access our database using the C language Access our database using Python Postgresql 查看数据库,表,索引,表空间以及大小 3. 系统学习 PostgreSQL Tutorials 4. (可选)安装 PgAdmin 图形化界面 MACOS 系统安装 PgAdmin
将RPM和源码安装两种方式的操作流程进行对比,会发现源码安装需要处理很多依赖问题的琐事,显然比较麻烦,这里个人更偏向官方推荐的RPM方式进行Postgresql安装搭建,省去很多钻牛角尖的时间。 参考资料 Linux部署postgresql并开启远程访问 - 掘金 (juejin.cn) # PostgreSQL在Linux下的两种安装方式 ...
0000000100000001000000F5 / 0000000100000001000000F5 database size: 35.2MB, database backup size: 3.3MB repo1: backup set size: 4.4MB, backup size: 394.3KB backup reference list: 20230604-200441F diff backup: 20230604-200441F_20230604-201057D timestamp start/stop: 2023-06-04 20:10:57 / 2023...
(url) if response.status_code == 200: # 获取网页内容 web_html_data = response.text soup = BeautifulSoup(web_html_data, 'html.parser') # 获取标题(H1标签) title = soup.find('h1').text.strip() # 获取描述(class为shortdesc的p标签内容) description = soup.find('p', class_='shortdesc...
The partition key controls the size of a partition. When you use an INSERT or UPDATE SQL command on a partitioned table, the database engine routes the data to the appropriate partition. PostgreSQL table partitions that store the data are child tables of the main table. During database ...