Please keep in mind the 128Mb is some kind of catchall for defined when memory sizes did not go much higher than 16Gb. I will inquire in the ML that covers makedumpfile to see if there is a way to come up with an estimate of the required memory and will report back.
In the meantime, I don't see any issue with having to setup the value manually for servers that have large amount of memory.
Please keep in mind the 128Mb is some kind of catchall for defined when memory sizes did not go much higher than 16Gb. I will inquire in the ML that covers makedumpfile to see if there is a way to come up with an estimate of the required memory and will report back.
In the meantime, I don't see any issue with having to setup the value manually for servers that have large amount of memory.