Note also that "error" can be thought of as "leaving room for whatever happens in the future".
Thanks, -- Raul On Thu, Jul 10, 2014 at 10:04 PM, Don Guinn <[email protected]> wrote: > 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 > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
