davidray

On Fri, Jun 19, 2009 at 2:12 AM, Michael Gannon <michael.gannon@gmail.com> wrote:

    Hi List,

    We have been pushing our application with some performance testing of late and during these tests we are experiencing some PermGen out-of-memory problems using JRuby 1.2.0 + Rails 2.2.2. Our application is a multithreaded app, a main thread with a number of worker threads. The worker threads are fairly simple really, mainly making use of ActiveRecord libraries, then we simply let them die.

    For our testing we have increased the heap size and only now are we encountering a PermGen problem. I have read the article by Nick Sieger (http://blog.nicksieger.com/articles/2008/02/21/jruby-and-the-permanent-generation) but what isn't clear is how to estimate the required PermGen size, when is enough enough? Is there a reason why we are only encountering the problem after increasing the heap size?

    We as yet have not changed the default PermGen sizes so they are as default (64m max?) as we want to understand what

davidray

Jun 8, 2009 1:22:36 AM org.apache.catalina.core.AprLifecycleListener init
INFO: The APR based Apache Tomcat Native library which allows optimal performanc
e in production environments was not found on the java.library.path: /usr/local/
jdk1.6.0_07/jre/lib/amd64/server:/usr/local/jdk1.6.0_07/jre/lib/amd64:/usr/local
/jdk1.6.0_07/jre/../lib/amd64:/usr/java/packages/lib/amd64:/lib:/usr/lib
Jun 8, 2009 1:22:36 AM org.apache.coyote.http11.Http11Protocol init
INFO: Initializing Coyote HTTP/1.1 on http-8080
Jun 8, 2009 1:22:36 AM org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 464 ms
Jun 8, 2009 1:22:36 AM org.apache.catalina.core.StandardService start

davidray

"Sort  (cost=377.39..377.41 rows=8 width=1440) (actual time=68.444..68.698 rows=182 loops=1)"
"  Sort Key: (ts_rank(people.vector, to_tsquery('reyes | r200'::text))), people.last_name, people.first_name, entities.id, events.event_onset_date"
"  Sort Method:  quicksort  Memory: 118kB"
"  ->  Nested Loop Left Join  (cost=2.42..377.27 rows=8 width=1440) (actual time=16.683..58.697 rows=182 loops=1)"
"        ->  Nested Loop  (cost=2.42..374.68 rows=8 width=1396) (actual time=16.489..48.656 rows=182 loops=1)"
"              ->  Nested Loop  (cost=2.42..333.38 rows=10 width=888) (actual time=16.408..43.144 rows=182 loops=1)"
"                    ->  Nested Loop  (cost=2.42..328.57 rows=13 width=721) (actual time=16.313..37.381 rows=182 loops=1)"
"                          ->  Bitmap Heap Scan on people  (cost=2.42..40.31 rows=21 width=156) (actual time=16.119..23.940 rows=239 loops=1)"
"                                Filter: (vector @@ to_tsquery('reyes | r200'::text))"
"                                ->  Bitmap

davidray

 NoMethodError in Morbidity_events#edit

Showing app/views/events/_diagnostic_show.html.haml where line #30 raised:

You have a nil object when you didn't expect it!
The error occurred while evaluating nil.place

Extracted source (around line #30):

27:   - fields_for(event_type + "[diagnostic_facilities_attributes][#{uniq_id}]", @diagnostic) do |pe|

davidray

2009-06-08 14:29:37] [DEBUG]   FormElement Load (1.0ms)   SELECT * FROM "form_elements" WHERE ("form_elements"."name" = '') AND ("form_elements".parent_id = 62694) LIMIT 1
[2009-06-08 14:29:37] [WARN ] <NoMethodError> undefined method `code' for nil:NilClass
	/srv/tomcat6/utnedss/WEB-INF/app/models/answer.rb:113:in `set_answer_code'
	/srv/tomcat6/utnedss/WEB-INF/app/models/answer.rb:98:in `before_save'
	/usr/local/tomcat6/webapps/utnedss/WEB-INF/gems/gems/activerecord-2.3.2/lib/active_record/callbacks.rb:347:in `callback'
	/usr/local/tomcat6/webapps/utnedss/WEB-INF/gems/gems/activerecord-2.3.2/lib/active_record/callbacks.rb:249:in `create_or_update_with_callbacks'
	/usr/local/tomcat6/webapps/utnedss/WEB-INF/gems/gems/activerecord-2.3.2/lib/active_record/base.rb:2539:in `save'
	/usr/local/tomcat6/webapps/utnedss/WEB-INF/gems/gems/activerecord-2.3.2/lib/active_record/validations.rb:1009:in `save_with_validation'
	/usr/local/tomcat6/webapps/utnedss/WEB-INF/gems/gems/activerecord-2.3.2/lib/active_record/dirty.rb:

davidray

8178884  total memory
     7932272  used memory
     4767144  active memory
     2976724  inactive memory
      246612  free memory
      506780  buffer memory
     7126120  swap cache
     4194296  total swap
         160  used swap
     4194136  free swap

davidray

4048176  total memory
     2783704  used memory
     2099144  active memory
      568768  inactive memory
     1264472  free memory
      291924  buffer memory
     1097864  swap cache
     4194296  total swap
          92  used swap
     4194204  free swap

davidray

#!/bin/sh
# Copyright (c) 1995-2004 SUSE Linux AG, Nuernberg, Germany.
# All rights reserved.
#
# Author: Kurt Garloff
# Please send feedback to http://www.suse.de/feedback/
#
# /etc/init.d/postgresql
#   and its symbolic link
# /(usr/)sbin/rcpostgresql

davidray

silent_mode                     | off                                  | Runs the server silently.
log_autovacuum_min_duration     | 0                                    | Sets the minimum execution time above which autovacuum actions will be logged.
log_checkpoints                 | on                                   | Logs each checkpoint.
log_connections                 | off                                  | Logs each successful connection.
log_destination                 | stderr                               | Sets the destination for server log output.
log_directory                   | pg_log                               | Sets the destination directory for log files.
log_disconnections              | off                                  | Logs end of a session, including duration.
log_duration                    | off                                  | Logs the duration of each completed SQL statement.
log_error_verbosity             | default                              | Sets the verbosity of l

davidray

java.lang.OutOfMemoryError: PermGen space
	at sun.misc.Unsafe.defineClass(Native Method)
	at sun.reflect.ClassDefiner.defineClass(ClassDefiner.java:45)
	at sun.reflect.MethodAccessorGenerator$1.run(MethodAccessorGenerator.java:381)
	at java.security.AccessController.doPrivileged(Native Method)
	at sun.reflect.MethodAccessorGenerator.generate(MethodAccessorGenerator.java:377)
	at sun.reflect.MethodAccessorGenerator.generateConstructor(MethodAccessorGenerator.java:76)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:30)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:513)