Skip to content

Large Memory Jobs

By default, 2 GB of RAM (aka memory) will be assigned to your jobs. However, some jobs will require additional memory to complete successfully. To request more memory, use the HTCondor request_memory attribute in your submit file. The default unit is MB. For example, the following will request 12 GB:

request_memory = 12228

You might be wondering why the above is requesting 12228 MB for 12 GB. That's because byte units don't actually scale by 1000 (10^10) like the metric system, but instead scale by 1024 (2^10) due to the binary nature of bytes.

Alternatively, you can define a memory request using standard units

request_memory = 12GB

We recommend always explictly defining the byte units in your request_memory statement.

Please note that the OSG has limited resources available for large memory jobs. Requesting jobs with higher memory needs will results in longer than average queue times for these jobs.