Nsf_backup_memory_constrained

We have EMC Networker backup solution for our backup software. Everything has been working fine until a couple of night ago. I got a Panic , and out Memory crash right after the schedule backup.

After analyzing the crash I found that it was due to the backup software and using all the memory available to the server. IBM recommend using NSF_BACKUP_MEMORY_CONSTRAINED and has anyone done this?

Subject: yes and it worked (meaning no more error during backup)

Subject: default value?

was the default value of 20mb sufficient for this parameter?