PostgreSQL

What is a bitmap index? Some features of bitmap indexing? What are the advantages and disadvantages of bitmap indexing? To see the example of the next image scan. QUERY Plan-------------------------------------------------------------------------

People familiar with Oracle are not unfamiliar with temporary tables (temporary table), many scenarios have a good effect on solving problems, and the concept of temporary tables in open Source Library PostgreSQL, although the same name as temporary

Windows installation processDownload the binary installation package from here and follow the prompts step by step.Service ManagementThe name of the service can be used first to services.msc viewλ net start postgresql-x64-10postgresql-x64-10 -

check_postgres.pl Plugin monitoring PostgreSQL database:Download URL:Https://exchange.nagios.org/directory/Plugins/Databases/PostgresQL/check_postgres/details# tar ZXFV check_postgres-2.11.1.tar.gz# Rsync-av

PostgreSQL is an object-relational database (database management system) based on the BSD license. Because of the flexibility of the license, anyone can use, modify, and distribute PostgreSQL for free for any purpose. Simply put, even if you take it

In normal work, sometimes need remote connection PostgreSQL database to do some maintenance, such as remote backup, etc. if the backup script is written in the remote machine, the backup will pop up the password input prompt, then the script can not

First, the functionKeepalived provides a health check of the objects in the server pool, and also enables fault isolation of failed machines and services, removes them from the service pool, and keepalived automatically joins the service pool if the

First, the environment#配置远程连接su postgres vim/var/lib/pgsql/9.4/data/postgresql.conf Edit configuration file listen_address= ' localhost ' before the comment # removed,  And the ' localhost ' should be ' * '; vim/etc/postgresql/8.2/main/pg_hba.conf

Running out of disk space in the Pg_xlog directory is a fairly common Postgres problem. This important directory holds the WAL (Write Ahead Log) files. (WAL files contain a record of all changes made to the Database-see the link for more details).

/* In the process of writing the Greenplum function, the following two functions are found, based on the affinity of Greenplum and PostgreSQL, when determining whether a string is a numeric or date format. */--1. Determine if a string is a digital

1. Check whether the Linux system installs the databaseFirst see if your system has the PostgreSQL database command installed as follows: Rpm-qa | grep PostgreSQLIf the query results are not displayed (as shown), the PostgreSQL database is not

Download binary package: https://www.enterprisedb.com/download-postgresql-binariesUnzip directly to C driveMicrosoft Windows [version 6.3.9600](c) Microsoft Corporation. All rights reserved.C:\USERS\XXXX>CD

Tag:http   io   os    use     data    on    c   log    code     A good news: in September, the PostgreSQL OPM development team released the first release version of the open source PostgreSQL database Monitoring Suite, OPM v2.3.PostgreSQL is an

PostgreSQL Performance Monitoring ToolsHttps://github.com/CloudServer/postgresql-perf-toolsThis package includes three useful scripts aimed to help to pinpoint performance issues on systems with PostgreSQL as data Base backend.All Scritps is written

4.4 Stream-based and file-based recoveryLife is not always black or white; sometimes there are some shades of gray. For some scenarios, stream replication may be just right. In other cases, file-based replication and PITR are what you need. However,

Strict intranet environment, no network connection, the newly installed Fedora 22 system, no other configuration.Installation 1. Installation Environment: Operating system: Fedora 22 Database: postgresql-9.4 The installation process

First, the geometry type in the PostGISPostGIS supports the "simple Features" type of all OGC specifications, and on this basis expands support for 3DZ, 3DM, and 4D coordinates.1. OGC WKB and WKT formatsThe OGC defines two formats for describing

In the case of manual installation (for the case where the source code is compiled for PG or the decompressed version is installed for PG), PG does not start automatically when it is started, and stops automatically when it is turned off, as a DBA,

Document directory 9.2.2. Case sensitivity of the identifier From: http://bbs.chinaunix.net/viewthread.php? Tid = 812899   This problem is lost because I just got started with pgsql. PostgreSQL is case-sensitive and converts the database object

The amount of data will be huge in the future/you cannot predict the size of the data. We recommend that you change to PostgreSQL. After a certain amount of data is stored in MySQL (generally, the performance of a single MySQL table is the best-,