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Mar 7, 2023
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Update environment variables #418

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6 changes: 4 additions & 2 deletions docs/overview/environment.md
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Expand Up @@ -49,11 +49,13 @@ Notably, you shouldn't store large amounts of data in your home directory. Inste

We set several environment variables when your server is started.

Variable | Value | Description
---------------------------------- | ------------- | -----------
Variable | Value | Description
---------------------------------- | ------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------
PC_SDK_SUBSCRIPTION_KEY | unique to you | Used to [sign assets](../concepts/sas) to download data.
GDAL_DISABLE_READDIR_ON_OPEN | EMPTY_DIR | [Improves GDAL performance](https://trac.osgeo.org/gdal/wiki/ConfigOptions#GDAL_DISABLE_READDIR_ON_OPEN) when opening single COGs with GDAL.
GDAL_HTTP_MERGE_CONSECUTIVE_RANGES | YES | [Improves GDAL performance](https://trac.osgeo.org/gdal/wiki/ConfigOptions#GDAL_HTTP_MERGE_CONSECUTIVE_RANGES) by merging consecutive HTTP requests.
GDAL_HTTP_MAX_RETRY | 5 | Number of retries on HTTP errors 429, 502, 503, or 504.
GDAL_HTTP_RETRY_DELAY | 3 | Number of seconds between retries.

## Understanding the software environment

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