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Showing posts from October, 2017

Postgresql partituoning (few simple steps)

History I created a simple application for logistic purpose based on Django, PostgresSQL, and Postgis.  This is a service receiving a position of a truck and place it on the map. Service is really simple and uses a virtual machine with small performance.  The main problem of the current solution is a small performance of this cloud server.  Most of the cloud providers use LAN for attaching virtual server's drives. As result speed of disk I/O is really small.   root@sergiy:/home/serg# fdisk -l Disk /dev/xvda1: 20 GiB, 21474836480 bytes, 41943040 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk /dev/xvda2: 1 GiB, 1073741824 bytes, 2097152 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes root@sergiy:/home/serg# hdparm -tT /dev/xvda1 /dev/xvda1: Timing cache

Upgrade postgres 9.4 to 9.6 at Debian linux

I'm using virtual server based on Debian Linux for some my free projects.  One of them is based on Postgres with PostGIS extension.   This windy rainy day is a good time for executing some upgrade. Also I would like to add partman extension for partituoning. Checking new version.  Update package list : aptitude update Get: 1 http://ftp.debian.org/debian jessie-updates InRelease [145 kB] Get: 2 http://security.debian.org stretch/updates InRelease [62.9 kB] Get: 3 http://security.debian.org jessie/updates InRelease [63.1 kB]  Check for new version: dpkg-query -l postgresql* Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad) ||/ Name V