A good solution. I was concerned on how to avoid those who were using MemoryLimit as a power of 2 already. Perhaps you should set the limit to more than 100. Perhaps 1000 or even more. The smallest value(9!:21) will take is 2^17 or 65536. 2^100 seems like a ridiculously large number but IBM's System 38 had 72 bit addressing and that was over 30 years ago. Granted, the hardware only handled 2^24, but the next 24 were like segment registers and the top 24 were a sequence number to avoid duplication. 64 bit addressing is now commonplace. Multi-terabyte disks may become address extensions. IP addresses are now 64 bit. What if terabyte disks became extensions to this address? Who knows?
My point is that it costs nothing to set the cutoff anywhere below 2^17 leaving room for whatever happens in the future. On Thu, Jul 10, 2014 at 4:56 PM, chris burke <[email protected]> wrote: > Agreed, I will make the change. > > The definition has been that way (power-of-2) for years, but it is easy to > support both. A number < 100 is a power, and otherwise it is the memory in > bytes. > > > On Thu, Jul 10, 2014 at 3:09 PM, Don Guinn <[email protected]> wrote: > > > Now that J8.02 is officially released, I guess this is where to report > > installation problems. To bad I didn't report it earlier. > > > > In system/util/configure.ijs, line 71 MemoryLimit from config/base.cfg is > > handled. > > > > I wanted to limit J's memory to about 1G, so I set MemoryLimit to 1e9 to > > prevent J from excessive paging. As in as described for (9!:21) and works > > as described: > > 9!:21]1e9 > > 9!:20 '' > > 1073741824 > > > > But the expression on that line expects MemoryLimit to be a number to > raise > > 2 to, in my case, 30. The comments as the top of base.cfg imply that > > MemoryLimit should be as described for (9!:21). > > > > Either the comment needs to be changed or simply change line 71 to: > > 9!:21 MemoryLimit > > > > (9!:21) rounds up its argument to the next power of 2, so there is no > need > > to go to all the trouble to make sure that the number passed is a power > of > > 2. I suggest changing line 71 as people think in terms of how much memory > > they want, not having to convert it to a power of 2. > > ---------------------------------------------------------------------- > > For information about J forums see http://www.jsoftware.com/forums.htm > > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
