109 - SQ runs slow after many hrs, even after exit and start again.

Do you really need 120 GB of RAM for SQ?

How many strategies do you store into databank?

Using this extreme amount of RAM doesn't necessarily bring better performance. I would recommend using jst 16 - 32 GB of memory, this should be enough for mos scenarios.

Memory management will be slow when so much memory has to be managed, and it seems it will bring problems on OS level.

This Lenovo Workstation was custom built to run 28 instances of SQ3 each limited to 4GB ram and was set running for 2 - 4 months at a time without any intervention or supervision. It is a solid and stable data center quality computer and even though it uses old tech and just won't die.

With SQ4's advanced testing and better usage of resources I agree that 128 GB is overkill but it is paid for and I have no other use for the memory. I use a faster newer tech single CPU machine for analyzing the results. 

I have the databank set to store up to 10,000 strategies but I have not produced more than 20 at this time - thanks to the advanced checking & crosschecking in SQ4.

After the last re-boot it has now been running over 17 hours and the computer is still responsive as it should be.  SQ4 reports memory heap as:

Total: 120GB

Green shaded area is at about 58GB

Orange (memory in use): up to about 56GB

While this computer is the most stable that I have, it is always possible that the problem was a random event with the OS.

Dave

I would still try to run it with much less memory, for example 32GB. You might find out that SQ X is actually faster in that configuration.

And you could try to run 2 or 3 instances of SQ X, maybe the combined performance would be also better.