[install PG]

linux install PG

There are three ways to install , The first binary installation package installation , The second way is through yum install , The third kind of . Compile and install through source code
Be careful ：

• 1. The binary package includes the compiled , Programs that can run directly . By downloading and unpacking （ install ）, After executing this instruction, you can use it immediately . Simple and quick , Suitable for relatively fixed , Procedures that do not need to be changed .

• 2. The source code package contains the original code of the program , It must be compiled on your computer , Generated executable binary files , To run . Some personal developed programs , The third-party modification or the program you want to modify should be compiled and installed through the source code package .

In fact, the first kind and the second kind can be divided into one kind , Here is a defect if the prompt has dependencies , You need to install dependencies .

Compile and install through source code

This installation method is relatively free , Installation can be minimized , It can also be fully installed .

Dependent packages before compilation , With RedHat/CentOS For example ：

Minimum dependence ：gcc,gcc-c++,zlib-devdl,readline-devel
Other dependence ：perl-ExtUtils-Embed,pam-devel,libxslt-devel,openldap-devel,python-devel,openssl-devel,cmake

The installation of source code generally consists of three steps :

Download source package ：https://www.postgresql.org/ftp/source/

# decompression tar.gz command 
tar -xzvf file.tar.gz

Download the suffix .tar.gz My bag , You can also download the latest version . After decompression , use cd Command to this directory , Use ll perhaps ls You can see all the extensions below . Next, enter the three steps of installation .

• 1. To configure （configure）

configure Configuration instructions ：./configure -help You can output a detailed list of options 
 Main options ：
 prefix: Specify installation path 
 with-openssl: Yes openssl Extended support 
 with-python： Yes python Extended support 
 with-perl: Yes perl Extended support 
 with-libxml： Yes xml Extended support 

./configure --prefix=/usr/local/pg122 --with-pgport=1923 --with-openssl --with-perl --with-tcl --with-python --with-pam --without-ldap --with-libxslt --enable-thread-safty --with-wal-blocaksize=16 --with-blocksize=8 --enable-dtrace --enable-debug
./configure --prefix=/usr/local/pg141 --with-pgport=1923 -with-openssl --with-python --with-pam --with-libxml --with-libxslt --enable-tread-safety

Be careful ：
–with-blocksize
If the database needs to be inserted frequently , The amount of data is growing very fast , Try to set this parameter larger ; Often do small data query , When updating and the memory is not very large, you can set it smaller . Default 8k that will do .
–enable-dtrace --enble-debug Do not add

• 2. compile （make）

gmake world  -- Including all compilation of third-party plug-ins 
gmake check-world -- This needs to be executed by ordinary users , Optional , Longer time consuming 

Note that if the dependent dynamic library is missing , You need to install it in advance ,gmake world The installation includes documentation , be-all contirb

• 3. install （make install）

 gmake install-world -- Including the installation of all third-party plug-ins 

• 4. To configure
  Create a normal user startup database , Super user cannot start database , If you use super user to start , Need to modify the source code , Yes root Some things detected by users , And modify its profile

useradd postgres
su - postgres
gedit/vim ~/.bashrc(bash_profile)
#add
export PGPORT=1923
export PG_HOME=/usr/local/pg122
export PATH=$PG_HOME/data
export LD_LIBRARY_PATH=$PG_HOME/lib
export LANG=en_US.utf8
# Save the document , Then activate 
source ~/.bashrc

After the software is installed , To initialize

initialization (initdb)

• 1. Database cluster “cluster”, Is a file containing all the data 、 Profile's “data” Catalog
• 2. A physical server can have multiple cluster, adopt data Path and port Distinguish between port numbers .
• 3. Compile the installed database , need initdb Command to manually initialize the data Catalog , Common parameters are as follows ：-D:data Path to directory -U: Database super user name -E： Configure regional language 、 Character set

initdb -D $PGDATA -E UTF8 --locale=C -U postgres -W

Pay attention to add -W The parameter will prompt for the password of the super user of the database , The password is blank by default

Modify the configuration file before starting the database
pg_hba.conf Used to configure the source of controlling access to the database
postgresql.conf Is the main configuration file of the database , You'd better adjust it, too linux Kernel parameters .
The installation is completed and ready to start the authentication service .

How to uninstall the compilation software installation

Compile and install how to uninstall ： Three unloading methods

• 1. Remove installation directory ： Check whether it is used when installing the software –prefix This command , If so, delete the file you specified ;
• 2. Execute the uninstall program ： If it doesn't work –prefix This directory specifies , Enter the directory after software decompression , perform sudo make uninstall See if you can make it ;
• 3. Search and delete relevant directories ： The last resort is to use whereis postgresql Locate the software installation directory ,rm -rf dir Delete these directories