Size Options

The --ht-mem-limit option controls the generated hash table size by specifying the DRAGEN board memory available for both the hash table and the encoded reference genome. The ‑‑ht‑mem-limit option defaults to 32 GB when the reference genome approaches WHG size, or to a generous size for smaller references. Normally there is little reason to override these defaults.

This option specifies the hash table size to generate, rather than calculating an appropriate table size from the reference genome size and the available memory (--ht-mem-limit). Using default table sizing is recommended and using --ht-mem-limit secondary.