Stability and Memory Pressure in 8.2

[pgf at laptop.org]

i wrote:
 > 
 > i think there's definitely a sugar shell leak.  here's some
 > partial data, gathered from a few machines on my desk right now.
 > 
 > (be careful with the column headings -- i rearranged partway through
 > to get separate CODE and DATA columns.)
 > 
 > (also, don't do an absolute compare between the 708 build and the
 > 759 build -- the latter is chock full of activites, the former
 > has none at all.)
 > 
 > 
 > build 708:
 > top - 17:45:17 up 59 min,  3 users,  load average: 0.03, 0.05, 0.01
 >  PID USER      PR  NI  VIRT  RES  SHR CODE DATA %MEM COMMAND
 > 1741 olpc      15   0 53128  27m  13m    4  14m 12.2 python
 > 
 > same build 708, roughly twenty minutes later:
 > top - 18:03:16 up  1:17,  3 users,  load average: 0.01, 0.01, 0.00
 >  PID USER      PR  NI  VIRT  RES  SHR CODE DATA %MEM COMMAND
 > 1741 olpc      15   0 53308  28m  13m    4  14m 12.3 python

another hour later on 708:
top - 19:06:19 up  2:21,  3 users,  load average: 0.00, 0.00, 0.00
 PID USER      PR  NI  VIRT  RES  SHR CODE DATA %MEM COMMAND
1741 olpc      15   0 53576  28m  13m    4  15m 12.3 python

call it 200 KB/hour?

 > 
 > build 759:
 > top - 12:20:00 up 39 min,  4 users,  load average: 0.00, 0.06, 0.11
 >  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
 > 1461 olpc      20   0 60576  33m  14m S  0.3 14.5   0:48.38 python
 > 
 > same build 759, almost two hours later:
 > top - 14:04:11 up  2:23,  3 users,  load average: 0.04, 0.06, 0.08
 >  PID USER      PR  NI  VIRT  RES  SHR CODE DATA %MEM COMMAND
 > 1461 olpc      20   0 65964  38m  14m    4  23m 16.7 python

and another hour on 759:

top - 15:07:25 up  3:27,  3 users,  load average: 0.00, 0.04, 0.02
 PID USER      PR  NI  VIRT  RES  SHR CODE DATA %MEM COMMAND
1461 olpc      20   0 70468  42m  14m    4  28m 18.6 python

seems more like 4.5 MB/hour.

(there are a lot of variables in play here -- the main thing is
that something's certainly leaking.)

paul
=---------------------
 paul fox, pgf at laptop.org