NOTICE: is no longer in use from 1st March 2024. Please use the OpenStreetMap Community Forum


I'm trying to figure out how often to have Osmosis update the whole planet on an OSM server I'm provisioning. Does anyone have typical import times for importing a daily updates in 1 hour chunks and 1 day chunks on their server? I will probably be able to allocate a good amount of memory (~16GB) and processors (~6-8 CPUs) on my server. Thanks in advance for any help.

asked 05 Feb '19, 00:34

coderunner's gravatar image

accept rate: 0%

This heavily depends on your disks. With non-SSD disks, or with disks mounted over network, applying an hourly update can take longer than one hour. With good SSD/NVMe disks you should be able to process an hourly diff in about 15 minutes and a daily diff in about 3-4 hours. Of course this is not constant; there can be exceptionally busy days or hours where your update takes longer, and also if your server does a lot of rendering in parallel things will be slowed down. Having 64 GB of RAM would likely bring these import times down to under 10 minutes for an hourly and 2-3 hours for a daily diff. CPU cores are less important, having just four would likely not make a difference. YMMV.

permanent link

answered 05 Feb '19, 08:42

Frederik%20Ramm's gravatar image

Frederik Ramm ♦
accept rate: 23%

@Frederik Ramm thanks for the answer. That helps a lot. I am running on SSD/NVMe disks. Sounds like hourly is a better fit for my use case because I would prefer the server's rendering performance not be impacted for too long a duration. It sounds like rendering can be done in parallel with updating and Postgresql will prevent things from being corrupted?

(05 Feb '19, 21:13) coderunner

Yes, sure, rendering and updating can run in parallel. Rendering is read-only anyway, and transaction isolation on the database will ensure that you're only seeing one thing or the other and not some halfway thing.

(05 Feb '19, 23:59) Frederik Ramm ♦

Great, thanks for your help!

(06 Feb '19, 00:19) coderunner

Follow this question

By Email:

Once you sign in you will be able to subscribe for any updates here



Answers and Comments

Markdown Basics

  • *italic* or _italic_
  • **bold** or __bold__
  • link:[text]( "title")
  • image?![alt text](/path/img.jpg "title")
  • numbered list: 1. Foo 2. Bar
  • to add a line break simply add two spaces to where you would like the new line to be.
  • basic HTML tags are also supported

Question tags:


question asked: 05 Feb '19, 00:34

question was seen: 1,191 times

last updated: 06 Feb '19, 00:19

NOTICE: is no longer in use from 1st March 2024. Please use the OpenStreetMap Community Forum