Add a PostgreSQL installiation til

Author: meeeejin

README.md

@@ -101,6 +101,10 @@ TIL is a collection of the things that I learned today. The contents can be anyt
 
 - [Building PMDK on Ubuntu](pmdk/building-pmdk-on-ubuntu.md)
 
+### PostgreSQL
+
+- [PostgreSQL installation from source code](postgresql/installation-from-source-code.md)
+
 ### Predix
 
 - [Predix overview](predix/predix-overview.md) :kr:

postgresql/installation-from-source-code.md

@@ -0,0 +1,62 @@
+# PostgreSQL installation from source code
+
+Building PostgreSQL from the source code enables you to customize build parameters, compiler optimizations, and installation location.
+
+- [Reference](https://www.postgresql.org/docs/11/installation.html)
+
+## Get the source
+
+You can download the sources from the [website](https://www.postgresql.org/download). Then, unpack it:
+
+```bash
+$ tar xf postgresql-11.4.tar
+```
+
+## Build and install
+
+First, make a directory for build and configure the source tree for your system.
+
+```bash
+$ mkdir build_dir
+$ ./configure --prefix=/path/to/build_dir
+```
+
+Then build and install the source code.
+(8: # of cores in your machine)
+
+```bash
+$ make -j8 install
+```
+
+You need to tell the system how to find the newly installed shared libraries. Set the shared library search path in `~/.bashrc`:
+
+```bash
+export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/path/to/build_dir/lib
+export PATH=/path/to/build_dir/bin:$PATH
+```
+
+Then, apply the modified path:
+
+```bash
+$ source ~/.bashrc
+```
+
+## Start the database server
+
+Before you can do anything, you must initialize a database storage area on disk. To initialize a database cluster, use the command `initdb`, which is installed with PostgreSQL. The desired file system location of your database cluster is indicated by the `-D` option:
+
+```bash
+$ initdb -D /path/to/data_dir
+```
+
+Then, start the server with a log file:
+
+```bash
+$ pg_ctl -D /path/to/data_dir -l logfile start
+```
+
+You can stop the server using below command:
+
+```bash
+$ pg_ctl -D /path/to/data_dir -m smart stop
+```