[Zope] Zope slooooowww

[Oliver Bleutgen]

Matthew T. Kromer wrote:
> 
> Ron, just to make sure, you do have DMA enabled on your hard drives, 
> right?  hdparm should tell you that status.  If you don't, then you'll 
> suffer greatly when you need to do I/O because all of the bytes are 
> running through the CPU.
> 
Some more data points,

we have the same problem on a dev server, linux 2.2.13
The funny thing is, this happened after rebooting the server when we 
installed a scsi drive, before everything was ok.
The scsi drive does make some problems, and it might not be related 
directly to zope - I suspect the drive, but anyway, perhaps it's 
something else.

Ron, what OS are you running?
If linux, could you repeat the steps I did for comparision?

 >dmesg (fruitless, because dmesg is filled up with scsi-errors)
 >hdparm -t /dev/<of all disk devices>

/dev/hda:
  Timing buffered disk reads:  32 MB in  2.65 seconds =12.08 MB/sec

 >hdparm -T /dev/<of all disk devices>

/dev/hda:
  Timing buffer-cache reads:   64 MB in  0.61 seconds =104.92 MB/sec


 >time start (use -D option and press ctrl-C as soon as you see it has 
started up)

------
2002-03-14T16:45:18 INFO(0) ZServer HTTP server started at Thu Mar 14 
17:45:18 2002
         Hostname: baal.compuvision
         Port: 10080
Traceback (innermost last):
   File "/home/zope/Zope-2.3.3-src/z2.py", line 772, in ?
     asyncore.loop()
   File "/home/zope/Zope-2.3.3-src/ZServer/medusa/asyncore.py", line 
146, in loop
     poll_fun (timeout, map)
   File "/home/zope/Zope-2.3.3-src/ZServer/medusa/asyncore.py", line 70, 
in poll
     try: r,w,e = select.select (r,w,e, timeout)
KeyboardInterrupt
Traceback (innermost last):
   File "/home/zope/Zope-2.3.3-src/z2.py", line 548, in ?
     zdaemon.run(sys.argv, os.path.join(CLIENT_HOME, Zpid))
   File "/home/zope/Zope-2.3.3-src/lib/python/zdaemon.py", line 209, in run
     p,s = os.waitpid(pid, 0)
KeyboardInterrupt

real    0m20.928s
user    0m13.160s
sys     0m0.790s


You see, this is quite long.
No special products installed.