[Maxima-bugs] [maxima:bugs] #3590 Heap exhausted during garbage collection

[Gunter K. <pet...@us...>]

For the speed issue: If you are using wxMaxima displaying long matrices on MS Windows has been sped up in the current nightly build (which can be found at https://wolfgang.dautermann.at/maxima/nightlybuild/ ).


---

** [bugs:#3590] Heap exhausted during garbage collection**

**Status:** open
**Group:** None
**Created:** Thu Oct 17, 2019 10:15 PM UTC by Adan J Mireles
**Last Updated:** Thu Oct 17, 2019 10:24 PM UTC
**Owner:** nobody


I have been using Maxima recently, and I have found it extremely helpful. I am using a new, decent computer, but I frequently encounter slow calculations and errors;:

I am working with very, very long matrices (I do not know how to objectively describe them). 
Computer gets slow whenever I try to see the numbers, but that is not the main issue.
I was trying to calculate an integral which included a very long polynomial and its derivate, as well as a square root. And I got the following message [I hace read other posts with similar errors, but I was unable to understand the possible solutions, I read something about batch size and using CCL]:

Message from the stdout of Maxima: Welcome to LDB, a low-level debugger for the Lisp runtime environment. 
ldb>
Message from maxima's stderr stream: Heap exhausted during garbage collection: 0 bytes available, 16 requested. 
Gen  Boxed Unboxed   LgBox LgUnbox  Pin       Alloc     Waste        Trig      WP GCs Mem-age 
 0    3216       0       0       0    8   210501728    262048   126549760    3216   1  0.0000 
 1    6045       0       0       0   13   395988752    176368   269897488    6045   1  0.6286 
 2   11353       0       0       0   38   743673408    356800   447494112   11353   1  0.5735 
 3    8406       1       0       0   30   550594880    366272    20971520    8407   0  0.3588 
 4    1972      20       0       0   40   130109696    438016     2000000    1992   0  0.0000 
 5       0       0       0       0    0           0         0     2000000       0   0  0.0000 
 6     741     184      34      28    0    63259792   1424240     2000000     987   0  0.0000 
 7       0       0       0       0    0           0         0     2000000       0   0  0.0000 
           Total bytes allocated    =    2094128256 
           Dynamic-space-size bytes =    2097152000 
GC control variables: 
   *GC-INHIBIT* = true 
   *GC-PENDING* = true 
   *STOP-FOR-GC-PENDING* = false 
fatal error encountered in SBCL pid 3288(tid 0000000000A81B10): 
Heap exhausted, game over. 

What are your recomendations for the kind of work I am doing?
I am graphing and doing calculations with infinitesimal numbers with irrational values.

If this has been fixed before. Please pardon my ignorance, as I am new to this.
Thank you for your time.

I have decided not to attach my work, if that is okay.

—Adan



---

Sent from sourceforge.net because max...@li... is subscribed to https://sourceforge.net/p/maxima/bugs/

To unsubscribe from further messages, a project admin can change settings at https://sourceforge.net/p/maxima/admin/bugs/options.  Or, if this is a mailing list, you can unsubscribe from the mailing list.