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zsi
zsi at skolesys.dk
Fri May 15 06:03:14 EDT 2009
Hey *
I am creating a SOAP service that is based on ZSI and mod_python. I have
the service running and it works, but it's not performing well, so I made
did some output to the syslog from inside the handler:
reloadchecker.py:
----------------
testvar=1
----------------
My handler:
----------------
import capa0_9.soap.sessionservice as sessionservice
import capa0_9.soap.zsi_handler as zsi_handler
from mod_python import apache
import capa0_9.tools.log as log
import os,reloadchecker
mod = __import__('encodings.utf_8', globals(), locals(), '*')
mod = __import__('encodings.utf_16_be', globals(), locals(), '*')
def handler(req):
"""
The PythonHandler entry-point. This function must be present in
order to have mod_apache dispatch a python operation.
"""
zsi_handler.AsHandler(modules=(sessionservice,), request=req)
log.debug("REQUESTINFO: Interpreter Name = %s" %
str(req.interpreter))
log.debug("REQUESTINFO: os.getpid() = %s" % str(os.getpid()))
log.debug("REQUESTINFO: reloadchecker = %s" %
str(reloadchecker.testvar))
reloadchecker.testvar += 1
return apache.OK
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I log the interpreter name, which according to section 4.1 should make
mod_python boost performance by keeping the interpreter alive as long as
the apache server processes. And I log the pid of the interpreter. As it is
clear to see in the output below a new pid is spawned each time, it does
not reuse the interpreter and therefore, I guess, it has to reload
everything for each request. Note that i also list the apache2 processes
before and after I bombard the server with requests, it shows that the same
processes are running before and after. I also made a dummy module
"reloadchecker" that contains one variable "testvar". If it is reloaded the
variable is initialized to 1, if it was already loaded it should be
increased by 1 for each request.
Am I missing something, shouldn't mod_python optimize performance by
reusing previously loaded modules from earlier requests?
mikrov at capa-server:/srv/capa/www/0.9$ sudo ps aux | grep apache2
mikrov 7396 0.0 0.1 3004 764 pts/2 S+ 11:11 0:00 grep
apache2
root 22343 0.0 1.0 13728 5336 ? Ss May14 0:26
/usr/sbin/apache2 -k start
root 22346 0.0 0.6 13728 3136 ? S May14 0:04
/usr/sbin/apache2 -k start
root 22347 0.0 0.6 13728 3136 ? S May14 0:04
/usr/sbin/apache2 -k start
root 22348 0.0 0.6 13728 3136 ? S May14 0:04
/usr/sbin/apache2 -k start
root 22349 0.0 0.6 13728 3136 ? S May14 0:04
/usr/sbin/apache2 -k start
root 22350 0.0 0.6 13728 3136 ? S May14 0:04
/usr/sbin/apache2 -k start
root 22383 0.0 0.6 13728 3136 ? S May14 0:04
/usr/sbin/apache2 -k start
root 22392 0.0 0.6 13728 3136 ? S May14 0:04
/usr/sbin/apache2 -k start
root 22407 0.0 0.6 13728 3136 ? S May14 0:04
/usr/sbin/apache2 -k start
root 22716 0.0 0.6 13728 3136 ? S May14 0:03
/usr/sbin/apache2 -k start
root 23356 0.0 0.6 13728 3136 ? S May14 0:03
/usr/sbin/apache2 -k start
mikrov at capa-server:/srv/capa/www/0.9/sessionservice$ sudo tail -f
/var/log/syslog | grep REQUESTINFO
May 15 11:52:03 capa-server capa: REQUESTINFO: Interpreter Name =
/srv/capa/www/0.9/sessionservice/
May 15 11:52:03 capa-server capa: REQUESTINFO: os.getpid() = 7953
May 15 11:52:03 capa-server capa: REQUESTINFO: reloadchecker = 1
May 15 11:52:03 capa-server capa: REQUESTINFO: Interpreter Name =
/srv/capa/www/0.9/sessionservice/
May 15 11:52:03 capa-server capa: REQUESTINFO: os.getpid() = 7954
May 15 11:52:03 capa-server capa: REQUESTINFO: reloadchecker = 1
May 15 11:52:04 capa-server capa: REQUESTINFO: Interpreter Name =
/srv/capa/www/0.9/sessionservice/
May 15 11:52:04 capa-server capa: REQUESTINFO: os.getpid() = 7955
May 15 11:52:04 capa-server capa: REQUESTINFO: reloadchecker = 1
May 15 11:52:05 capa-server capa: REQUESTINFO: Interpreter Name =
/srv/capa/www/0.9/sessionservice/
May 15 11:52:05 capa-server capa: REQUESTINFO: os.getpid() = 7959
May 15 11:52:05 capa-server capa: REQUESTINFO: reloadchecker = 1
May 15 11:52:06 capa-server capa: REQUESTINFO: Interpreter Name =
/srv/capa/www/0.9/sessionservice/
May 15 11:52:06 capa-server capa: REQUESTINFO: os.getpid() = 7960
May 15 11:52:06 capa-server capa: REQUESTINFO: reloadchecker = 1
May 15 11:52:07 capa-server capa: REQUESTINFO: Interpreter Name =
/srv/capa/www/0.9/sessionservice/
May 15 11:52:07 capa-server capa: REQUESTINFO: os.getpid() = 7961
May 15 11:52:07 capa-server capa: REQUESTINFO: reloadchecker = 1
May 15 11:52:08 capa-server capa: REQUESTINFO: Interpreter Name =
/srv/capa/www/0.9/sessionservice/
May 15 11:52:08 capa-server capa: REQUESTINFO: os.getpid() = 7963
May 15 11:52:08 capa-server capa: REQUESTINFO: reloadchecker = 1
May 15 11:52:08 capa-server capa: REQUESTINFO: Interpreter Name =
/srv/capa/www/0.9/sessionservice/
May 15 11:52:08 capa-server capa: REQUESTINFO: os.getpid() = 7964
May 15 11:52:08 capa-server capa: REQUESTINFO: reloadchecker = 1
May 15 11:52:09 capa-server capa: REQUESTINFO: Interpreter Name =
/srv/capa/www/0.9/sessionservice/
May 15 11:52:09 capa-server capa: REQUESTINFO: os.getpid() = 7966
May 15 11:52:09 capa-server capa: REQUESTINFO: reloadchecker = 1
May 15 11:52:10 capa-server capa: REQUESTINFO: Interpreter Name =
/srv/capa/www/0.9/sessionservice/
May 15 11:52:10 capa-server capa: REQUESTINFO: os.getpid() = 7968
May 15 11:52:10 capa-server capa: REQUESTINFO: reloadchecker = 1
May 15 11:52:11 capa-server capa: REQUESTINFO: Interpreter Name =
/srv/capa/www/0.9/sessionservice/
May 15 11:52:11 capa-server capa: REQUESTINFO: os.getpid() = 7969
May 15 11:52:11 capa-server capa: REQUESTINFO: reloadchecker = 1
May 15 11:52:12 capa-server capa: REQUESTINFO: Interpreter Name =
/srv/capa/www/0.9/sessionservice/
May 15 11:52:12 capa-server capa: REQUESTINFO: os.getpid() = 7970
May 15 11:52:12 capa-server capa: REQUESTINFO: reloadchecker = 1
May 15 11:52:13 capa-server capa: REQUESTINFO: Interpreter Name =
/srv/capa/www/0.9/sessionservice/
May 15 11:52:13 capa-server capa: REQUESTINFO: os.getpid() = 7972
May 15 11:52:13 capa-server capa: REQUESTINFO: reloadchecker = 1
May 15 11:52:13 capa-server capa: REQUESTINFO: Interpreter Name =
/srv/capa/www/0.9/sessionservice/
May 15 11:52:13 capa-server capa: REQUESTINFO: os.getpid() = 7973
May 15 11:52:13 capa-server capa: REQUESTINFO: reloadchecker = 1
May 15 11:52:14 capa-server capa: REQUESTINFO: Interpreter Name =
/srv/capa/www/0.9/sessionservice/
May 15 11:52:14 capa-server capa: REQUESTINFO: os.getpid() = 7974
May 15 11:52:14 capa-server capa: REQUESTINFO: reloadchecker = 1
May 15 11:52:15 capa-server capa: REQUESTINFO: Interpreter Name =
/srv/capa/www/0.9/sessionservice/
May 15 11:52:15 capa-server capa: REQUESTINFO: os.getpid() = 7976
May 15 11:52:15 capa-server capa: REQUESTINFO: reloadchecker = 1
May 15 11:52:16 capa-server capa: REQUESTINFO: Interpreter Name =
/srv/capa/www/0.9/sessionservice/
May 15 11:52:16 capa-server capa: REQUESTINFO: os.getpid() = 7977
May 15 11:52:16 capa-server capa: REQUESTINFO: reloadchecker = 1
mikrov at capa-server:/srv/capa/www/0.9$ sudo ps aux | grep apache2
mikrov 7457 0.0 0.1 3004 764 pts/2 S+ 11:12 0:00 grep
apache2
root 22343 0.0 1.0 13728 5336 ? Ss May14 0:26
/usr/sbin/apache2 -k start
root 22346 0.0 0.6 13728 3136 ? S May14 0:04
/usr/sbin/apache2 -k start
root 22347 0.0 0.6 13728 3136 ? S May14 0:04
/usr/sbin/apache2 -k start
root 22348 0.0 0.6 13728 3136 ? S May14 0:04
/usr/sbin/apache2 -k start
root 22349 0.0 0.6 13728 3136 ? S May14 0:04
/usr/sbin/apache2 -k start
root 22350 0.0 0.6 13728 3136 ? S May14 0:04
/usr/sbin/apache2 -k start
root 22383 0.0 0.6 13728 3136 ? S May14 0:04
/usr/sbin/apache2 -k start
root 22392 0.0 0.6 13728 3136 ? S May14 0:04
/usr/sbin/apache2 -k start
root 22407 0.0 0.6 13728 3136 ? S May14 0:04
/usr/sbin/apache2 -k start
root 22716 0.0 0.6 13728 3136 ? S May14 0:03
/usr/sbin/apache2 -k start
root 23356 0.0 0.6 13728 3136 ? S May14 0:03
/usr/sbin/apache2 -k start
Best regards
Jakob Simon-Gaarde
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