Postgresql 9.5 failing to start in Ubuntu 16.04

Question

I have restarted my server because as i see the CPU usage by Postgresql is very high. 
After the restart i am seeing following logs in `/var/log/postgresql/postgresql-9.5-main.log`

```sh
2019-07-01 14:57:48 UTC [1225-1] FATAL:  could not remove old lock file "postmaster.pid": Permission denied
2019-07-01 14:57:48 UTC [1225-2] HINT:  The file seems accidentally left over, but it could not be removed. Please remove the file by hand and try again.
```

Karthik Divi · Accepted Answer

You can go ahead and delete the `"postmaster.pid"` file from the following location
`/usr/local/var/postgres/postmaster.pid`

Run the following command in your Ubuntu 16.04 server

```sh
sudo rm /usr/local/var/postgres/postmaster.pid
```

Postgresql 9.5 failing to start in Ubuntu 16.04

1 Answer