Elijah Robison | GIS Blog

I’m following the BostonGIS tutorial(s) to learn how to setup an OpenStreetMap tile server on Windows (XP 32, cos’ that’s what’s on the desk), and I’m running into headache after headache. So this post notes the gotcha’s I’m encountering and how I’m fixing them (optimistically assuming I fix all of them).

“Thar be dragons..” 8)

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Part I: “Failed to start MSVCR90.dll”

First, as recommended I tried using the HOTOSM installer, but when I launch it using the example command provided on the BostonGIS site, I got the error above. I’d logged out/in, rebooted, ad nauseam, to no avail. Also the problem can’t be my redist libs–this install of XP is only a couple months old, and I have all the redists libs I know of (2005, 2008, 2010—plus, when I try reinstalling a redist it says I have the latest). I consider uninstalling and reinstalling Visual Studio to be more trouble than just trying something else to get the OSM download into PostGIS, so..

Next I tried the latest “alpha” build of osm2pgsql (rather than the all-in-one HOTOSM installer), and that  got me around the MSVCR/redist issue. That is, it’s launching..

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Part II: the BostonGIS osm2pgsql example command

Error: Connection to database failed: could not connect to server: No such file or directory
Is the server running locally and accepting
connections on Unix domain socket “/tmp/.s.PGSQL.5432”?

…and then…

Error: Connection to database failed: fe_sendauth: no password supplied

…and then…

Out of memory for node cache dense index, try using “–cache-strategy sparse” instead

…and then…

Out of memory for sparse node cache, reduce –cache size

I’ve benefitted greatly from the BostonGIS tutorials, and I’m very thankful for them. (Thank you Regina, Leo, et. al., sincerely!) Having said that, though, here’s a few notes discussing how I addressed the above, for which a couple items are conspicuously missing in the BostonGIS osm2pgsl example command.

So take a look at this:

osm2pgsql missouri.osm.bz2 -H localhost -d OSM -U postgres -P 5432 -W -S default.style -C 512 –slim –hstore –cache-strategy sparse

What’s of-note:

-H localhost (solves the first error)

-W (solves the second error, i.e. lets you enter your db password after ENTER)

–cache-strategy sparse (gets past the third, and into the fourth error)

–slim (from everything I read, you just need this on a 32-bit system)

-C 512 (wicked-small cache size)

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21 Minutes. I’m not talking about an episode of Friends.

So those are the extra command parameters that ultimately got me to end-game:

Osm2pgsql took 1317s overall

Setting that wicked-small cache size finally did the trick (it actually finished while I was writing this). At first I started it larger (12000, look under “Parameters”), then I started backing off (4096, 2048 look under “Loading data into your server”), when all the examples I found didn’t work, I just tried reducing by the common multiples—again, 1024 didn’t work, but 512 did.

I need to do some research, but I guess that cache size suggests my hard disk must be ..wholly ..awful. :/ I’m not a gear-hound (clearly, I’m using XP), but that’s my best-guess.