OutOfMemoryError PermGen Space Solution (headache for a few days)

Solve

Outofmemoryerror:permgen Space

, the process is painful, the result is comfortable

Recently own program in

Redeploy

When redeploying, the old hint

Outofmemoryerror:permgen

Space

Error, searching the network for relevant data, but after doing it, there is still the problem. By

For the first time I have ever encountered this problem,

It cost me

2

Days time,

The process is more painful,

The result is still a comparison

satisfactorily. I wrote down my experience for my own reference, and also to share it with you.

On the web about

OutOfMemoryError:

PermGen

Space

A lot of solutions, but there are

The method is to forward each other, true and false difficult to distinguish. Some may also be misleading.

My environment is

Myeclips

8.5

、

tomcat6.x

，

After trying a lot of ways,

Like what:

Document

《

Linux

And

Windows

Modify

Java

Virtual Machine Memory Size "

（

http://duanfei.iteye.com/blog/1189541

）

，

In the way,

I've tried it all,

Or not

Line

And, of course, a lot of other information.

And then further study

Jvm

of optimization, etc.,

I just want to know.

The memory parameters I configured should be large enough,

Why is it still overflowing,

Did not take effect,

Then I need to find

What are the memory parameters that the system recognizes after configuration?

Refer to the knowledge on the network,

Started the

Jdk

Bring your own work

With

In

\jdk1.6.0_10\bin

The following

Jconsole.exe

Memory Monitoring Tools,

Click to enter as follows:

Choose

Pid

For

4472

of this process,

Click

, enter the following interface,

Select the memory page, and select the "Memory Pool" of the last option in the chart

Perm Gen

”

, the following detailed information shows

Is that:

The maximum value of this place is

65536Kb

, namely

64M,

So I found out why,

64M

Will definitely lead to overflow,

But I have configured hundreds of megabytes of memory space is not effective.

Attention

This is where I

Myclipse

Start in the

Tomcat

See the results.

Next, I entered

Bin/catalina.bat

In the file, "

REM-----Execute The requested Command-

"This

Add the following statement to the back of the

Set java_opts=%java_opts%-xms256m-xmx1024m

-xx:permsize=256m-xx:maxnewsize=256m-xx:maxpermsize=512m

, this place takes note of the increased bit

is placed in

REM-----Execute The requested Command

–

Back, Best

Set java_opts=%java_opts%

And this one has to be added,

There are many documents on this network that do not account for this location,

Or that's not the place,

Is

Not anywhere else, I didn't try. I started it manually.

Tomcat

In

Cmd

Status input:

Startup

And then

See

Jconsole.exe

Details

Perm Gen

Memory is the memory I have configured

521M

, it's in effect.

.

But I was

Myclipse

Start in

Tomcat

, re-deploy the program, the error remains. Original document

《

Linux

And

Windows

Modify

Java

Virtual Machine Memory Size "

（

http://duanfei.iteye.com/blog/1189541

) mentioned in

If it is through

MyEclipse

Start

Tomcat

Modify

MyEclipse

Configuration options

Open options

..

Input

Tomcat

Key words

,

Then open it.

Server

The following

Jdk

There will be a

Area

Optional Java VM arguments.

Join directly

-xms128m-xmx512m

There is a loophole in this place,

Join directly

“

-xms128m-xmx512m

”

，

Should be

“

-xms256m-xmx512m

-xx:permsize=256m-xx:maxpermsize=512m

”

, this is the

Myclipse

In force. If not

-xx:permsize=256m-xx:maxpermsize=512m

So

PermGen

The memory is always

64M

。 After modification, the heavy

Kai

Tomcat

, redeploy, memory no longer overflows.

On my machine is:

Servers/tomcat/tomcat 6.X/JDK

In the

Optional Java VM Arguments

：

。 Find the reason, the solution is naturally very simple.

Watch this place.

Servers/tomcat/tomcat 6.x

This place also has a parameter:

Optional Program

Arguments

, this feeling does not work very much, I also have no effect after the modification, I thought that modifies this place to be possible

, which led me to take a detour.

OutOfMemoryError PermGen Space Solution (headache for a few days)