OpenStreetMap Maintenance - 5 October 2025

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OpenStreetMap.org website & our mapping API will be read-only for server maintenance on the 5 October 2025 between 9:00 and 12:00 (UTC/GMT).

Announcement: OpenStreetMap Ops Team: "OpenStreetMap.org website & our mapping API will …" - OSM Town | Mapstodon for OpenStreetMap

See the time local to you: Event Time Announcer - OSM.org Maintenance - Read-only - 3 hour window

NOTE: community.openstreetmap.org users. It is likely that you will NOT be able to login during the maintenance window. If you login BEFORE the maintenance or after the window all will be good.

UPDATE: Maintenance has now been completed.

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For those interested, we will be upgrading to PostgreSQL 17 and upgrading server firmware.

The upgrade to PostgreSQL 17 and downstream OpenStreetMap services have already been tested for compatibility.

Once we have upgraded we will be switching to ZSTD compression for our weekly internal PostgreSQL database backups. These PostgreSQL backups are the source for generating the weekly planet dumps. The full end to end process currently takes around 6 days, we expect to be able reduce this by at least a day after switching to ZTD compression. The planet dumps format will remain unchanged.

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A good moment to download a larger work-area into JOSM just before (and save) so that the mapping itch can be tended to without interruption.:grin:

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Thanks for the heads up.

Could this post be pinned until then?

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@Firefishy Thank you very much for your work!

Just a small comment/question: you write UCT, but the linked page says British Summer Time (= UCT+1), which lasts until 25 October. What is correct?

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UTC. The linked page displays time in your local timezone. As far as I can see it is all correct.

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Thanks for the clarification.

The linked page shows me the event time and the converted time (local time). However, the event time is 10:00-13:00 BST (= UTC+1), not 10:00-13:00 UTC+0 (= 11:00-14:00 BST).

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The announced 9am UTC is 10am BST. The team members involved with this change are BST based. I don’t see a mistake.

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Oh dear, am I stupid… :see_no_evil_monkey: Please excuse me!

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Thanks for letting us know :smiling_face_with_three_hearts: :smiling_face_with_three_hearts:

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After the implementation it would be nice to have some kind of report/numbers that shows the improvements of using ZSTD in real world like this. :slight_smile:

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Here are my initial test numbers on a smaller dataset: pg_dump_compression_benchmark.md · GitHub

We currently use gzip at default level.

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Hi, thank you for working on OSM website and for flagging the maintenance ahead! :slight_smile: I am not much using the OSM Community Forum, I see that the topic is tagged in “maintenance” category. Is there a way for me to subscribe to the maintenance tag or any other way I could be notified about future planned maintenance/outage? I noticed this message only thanks to someone else sharing it. Thank you :slight_smile:

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To subscribe to a tag, go to the tag’s page. There will be a bell icon (typically in the top right corner) which you can click to choose one of several notification levels from a drop down menu.

Bell icon on a tag page
Bell icon on a tag page1238×611 59.4 KB

Depending on the email settings in your profile, choosing to watch a tag may also result in email notifications.

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Another way is to subscribe to the announce mailing list.

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You can also use use the RSS feed (just add .rss after any tag you are interested in), e.g.: OpenStreetMap Community Forum - Topics tagged maintenance

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A reminder that the maintenance window will fall on Sunday evening for those attending State of the Map in Manila (immediately after the closing ceremony concludes). Get your field surveying in before that time!

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T minus 83
minutes

:fireworks:

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It’s Down now.