From tomcat-user-return-29812-qmlist-jakarta-archive-tomcat-user=jakarta.apache.org@jakarta.apache.org Thu Aug 15 17:56:05 2002 Return-Path: Delivered-To: apmail-jakarta-tomcat-user-archive@apache.org Received: (qmail 52630 invoked from network); 15 Aug 2002 17:56:05 -0000 Received: from unknown (HELO nagoya.betaversion.org) (192.18.49.131) by daedalus.apache.org with SMTP; 15 Aug 2002 17:56:05 -0000 Received: (qmail 19207 invoked by uid 97); 15 Aug 2002 17:55:35 -0000 Delivered-To: qmlist-jakarta-archive-tomcat-user@jakarta.apache.org Received: (qmail 19076 invoked by uid 97); 15 Aug 2002 17:55:33 -0000 Mailing-List: contact tomcat-user-help@jakarta.apache.org; run by ezmlm Precedence: bulk List-Unsubscribe: List-Subscribe: List-Help: List-Post: List-Id: "Tomcat Users List" Reply-To: "Tomcat Users List" Delivered-To: mailing list tomcat-user@jakarta.apache.org Received: (qmail 18979 invoked by uid 98); 15 Aug 2002 17:55:32 -0000 X-Antivirus: nagoya (v4198 created Apr 24 2002) X-Server-Uuid: A30EB3EE-CD20-42DB-89B9-CCAEC3F48615 Message-ID: From: "Marinko, Jeff" To: "'Tomcat Users List'" Subject: RE: Checking Tomcat's Memory Date: Thu, 15 Aug 2002 10:54:42 -0700 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) X-WSS-ID: 114535692947144-01-01 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 7bit X-Spam-Rating: daedalus.apache.org 1.6.2 0/1000/N X-Spam-Rating: daedalus.apache.org 1.6.2 0/1000/N g isn't valid!?!? Grr... I got that information off of this mailing list, someone was using a similar configuration option that had "g" for gigabytes... Anyways, thanks! -----Original Message----- From: Sexton, George [mailto:gsexton@mhsoftware.com] Sent: Thursday, August 15, 2002 10:51 AM To: Tomcat Users List Subject: RE: Checking Tomcat's Memory g doesn't seem to be a valid memory increment. From the sun web site: -Xmsn Specify the initial size, in bytes, of the memory allocation pool. This value must be a multiple of 1024 greater than 1MB. Append the letter k or K to indicate kilobytes, or m or M to indicate megabytes. The default value is 2MB. Examples: -Xms6291456 -Xms6144k -Xms6m -Xmxn Specify the maximum size, in bytes, of the memory allocation pool. This value must a multiple of 1024 greater than 2MB. Append the letter k or K to indicate kilobytes, or m or M to indicate megabytes. The default value is 64MB. Examples: -Xmx83886080 -Xmx81920k -Xmx80m -----Original Message----- From: Marinko, Jeff [mailto:Jeff_Marinko@intuit.com] Sent: 15 August, 2002 11:44 AM To: 'Tomcat Users List' Subject: RE: Checking Tomcat's Memory Heh, the answer to that is "kind of". I can actually do roughly 250 TPS (at least according to a tool I'm using) for about 10-20 thousand requests, but I think this memory problem is giving me trouble after that. I thought it was a connections problem (I was getting connection errors from the tool), then I thought I had screwed something up in my code (and I've tried different versions, nothing seems to affect performance), then I noticed the memory never went above ~154 MB, so now I'm examining memory issues. My problem is still the same, after so many requests (and thus some amount of information stored in memory), Tomcat starts to use up a whole lot of CPU time. I think I hit the memory limit (as I get out of memory errors), so I'm trying to increase the memory Tomcat has, without much luck. I set the environment variable (as I mentioned before), but it does not appear to be working. I stopped and restarted Tomcat after doing this (although I have not restarted Windows) and the results were the same, no change in memory.... I'm still working on it though, still have a couple more things to try, if anyone has a good suggestions, feel free to chime in! Thanks! -----Original Message----- From: Sexton, George [mailto:gsexton@mhsoftware.com] Sent: Thursday, August 15, 2002 10:34 AM To: Tomcat Users List Subject: RE: Checking Tomcat's Memory So, did you get past to your 200 TPS limit goal? -----Original Message----- From: Marinko, Jeff [mailto:Jeff_Marinko@intuit.com] Sent: 15 August, 2002 10:49 AM To: Tomcat Users List Subject: Checking Tomcat's Memory Greetings! I'm running Tomcat 4.0.4 (w/ JDK 1.4, WinNT/2K) and would like to know how to check Tomcat's memory settings. I've defined an environment variable (in Windows) like so: CATALINA_OPTS=-server -Xms1g -Xmx3g and from reading previous e-mails on this list, this should set the JVM min and max heap size, yet how can I verify this? I'm currently testing a program that takes a considerable amount of memory, and after getting so many thousand requests (and storing a considerable amount of data in memory), the performance becomes horrible (3 to 4 times CPU usage, possibly due to gc looking for more memory?). I suspect the memory settings because when the CPU usage starts to spike, the memory usage tops off and does not appear to go up at all (when it most likely should continue to go up). 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