2012/3/9 Doron Tsur <qbal...@gmail.com>: > Hi Guys, > > A while back I've addressed you guys with the non paged pool issue. Most > people advised upgrading the java/tomcat. We did just that and the issue is > still happening. We are investigating a lot of directions of memory leaks > in the environment with Microsoft. I wanted to address you guys, to see if > you can give me a second feedback. The server isn't using direct memory or > JNI for tomcat. I've been perusing a lot of directions here, yet still at a > lost on why this is happening. Here is a recap of the information with the > updates: > > I've been having an issue in one of our production servers. The Non Paged > Pool creeps up slowly until the system hangs and than crash. > > Tomcat: 7 latest Java: 1.6.25 OS: Windows Server 2003 R2 SP2 >
Which version of 7.0.x, exactly? > This is a production server that uses high bandwidth. Poking around > Poolmon.exe I was able to find that > > 1. the AfdP tag is consuming a lot of NP (Non Paged) pool. > 2. This is a tag concerning the windows socket driver (afd.sys). > > We have many production servers running our tomcat. We have only > encountered this issue in two of them, those servers have the same > OS/Java/Tomcat installed. One server uses high bandwidth and the other uses > much less. > > I say tomcat because this is the process that consumes all NP pool (about > 170MB). > > 1. Have you ever encountered this issue? > 2. Do you know of any application level/Tomcat configuration work around > to solve this issue? > 3. Do you think that there is something wrong in the way Tomcat > interfaces with winsock? There can be different components that interact with networking. 1. There are 2 different connection protocols in Tomcat with 3 different implementations each (bio, apr, nio). Which one you are using? See what is logged when Tomcat starts. 2. There are database drivers. What database drivers are you using? > 4. Do you believe that Tomcat APR might resolve this issue? > 5. I can't seem to download this hotfix to further investigate these > files, they might contain a suitable version. Do you know how can I get > them? > > When Tomcat is killed the Non Paged Pool doesn't return to the OS. How do you observe it? I think you run Tomcat as a service. I am not sure whether service can be killed as well as a standalone program. > Please share your wisdom and Tomcat greatness, > Best regards, Konstantin Kolinko --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
