Memory not mapped

[Bob_Carpenter]

Hi, @icstan: sorry this didn’t get answered sooner.

@icstan

address 0x7fc3c5345b40, cause ‘memory not mapped’

I’m guessing this is from using too much memory for a big model. If so, check out this post, which has some hints on how to do loo on larger data sets.

Memory issues when computing LOO/WAIC

Hi! Like several other people on this forum I am running into memory issues when trying to compute LOO/WAIC for large datasets. My data has roughly 160,000 observations. The model has three grouping levels, one with 15 categories, one with 16 categories, and one with 240 (15 * 16) categories, along with 5-30 population-level parameters. I am running the model with the usual four chains with 2,000 iterations each and discard 1,000 as burn-in. I am trying to compute LOO/WAIC for model comparison…