无法更改 tomcat 7 堆大小

发布于 2024-11-16 05:45:30 字数 1354 浏览 2 评论 0原文

我通过在 catalina.sh 中添加以下行来设置 tomcat 7 的堆大小

export CATALINA_OPTS="-Xms512m -Xmx1024m"

，然后停止并启动 tomcat。但是当尝试使用命令 jmap -heap 获取堆大小时，我注意到内存没有改变：

Heap Configuration:
   MinHeapFreeRatio = 40
   MaxHeapFreeRatio = 70
   MaxHeapSize      = 526385152 (502.0MB)
   NewSize          = 1048576 (1.0MB)
   MaxNewSize       = 4294901760 (4095.9375MB)
   OldSize          = 4194304 (4.0MB)
   NewRatio         = 2
   SurvivorRatio    = 8
   PermSize         = 16777216 (16.0MB)
   MaxPermSize      = 67108864 (64.0MB)

Heap Usage:
PS Young Generation
Eden Space:
   capacity = 99352576 (94.75MB)
   used     = 9643144 (9.196418762207031MB)
   free     = 89709432 (85.55358123779297MB)
   9.705982862487632% used
From Space:
   capacity = 4063232 (3.875MB)
   used     = 0 (0.0MB)
   free     = 4063232 (3.875MB)
   0.0% used
To Space:
   capacity = 5177344 (4.9375MB)
   used     = 0 (0.0MB)
   free     = 5177344 (4.9375MB)
   0.0% used
PS Old Generation
   capacity = 37748736 (36.0MB)
   used     = 21889008 (20.874984741210938MB)
   free     = 15859728 (15.125015258789062MB)
   57.98606872558594% used
PS Perm Generation
   capacity = 60948480 (58.125MB)
   used     = 31496008 (30.03693389892578MB)
   free     = 29452472 (28.08806610107422MB)
   51.67644541750672% used

请告知。

原文

I have set the heap size of tomcat 7 by adding the following line in catalina.sh

export CATALINA_OPTS="-Xms512m -Xmx1024m"

then stopped and started the tomcat.
but when tried to get the heap size using the command jmap -heap , i can notice that the memory doesn't change:

Heap Configuration:
   MinHeapFreeRatio = 40
   MaxHeapFreeRatio = 70
   MaxHeapSize      = 526385152 (502.0MB)
   NewSize          = 1048576 (1.0MB)
   MaxNewSize       = 4294901760 (4095.9375MB)
   OldSize          = 4194304 (4.0MB)
   NewRatio         = 2
   SurvivorRatio    = 8
   PermSize         = 16777216 (16.0MB)
   MaxPermSize      = 67108864 (64.0MB)

Heap Usage:
PS Young Generation
Eden Space:
   capacity = 99352576 (94.75MB)
   used     = 9643144 (9.196418762207031MB)
   free     = 89709432 (85.55358123779297MB)
   9.705982862487632% used
From Space:
   capacity = 4063232 (3.875MB)
   used     = 0 (0.0MB)
   free     = 4063232 (3.875MB)
   0.0% used
To Space:
   capacity = 5177344 (4.9375MB)
   used     = 0 (0.0MB)
   free     = 5177344 (4.9375MB)
   0.0% used
PS Old Generation
   capacity = 37748736 (36.0MB)
   used     = 21889008 (20.874984741210938MB)
   free     = 15859728 (15.125015258789062MB)
   57.98606872558594% used
PS Perm Generation
   capacity = 60948480 (58.125MB)
   used     = 31496008 (30.03693389892578MB)
   free     = 29452472 (28.08806610107422MB)
   51.67644541750672% used

please advise.

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自由如风 2024-11-23 05:45:30

sudo vi /etc/default/tomcat7

找到以 JAVA_OPTS="-Djava.awt.headless=true 开头的行

，并将 piddly -Xmx128m 更改为 -Xms512m -Xmx1024m

如果您有多个核心...-XX:+UseConcMarkSweepGC 可能就是您想要的。

sudo vi /etc/default/tomcat7

Find the line that begins JAVA_OPTS="-Djava.awt.headless=true

and change the piddly -Xmx128m to -Xms512m -Xmx1024m

If you have more than one core...-XX:+UseConcMarkSweepGC is probably what you want.

回复收藏 0 原文

楠木可依 2024-11-23 05:45:30

请勿更改 catalina.sh!! 用户不应更改此文件。 Tomcat 更新可能会覆盖它。而是在“$CATALINA_BASE/bin”（与 catalina.sh 相同的文件夹）中创建一个名为“setenv.sh”的文件。在那里设置所有环境变量。

setenv.sh 是一个可选文件。如果存在，则由 catalina.sh 导入。这个名字暗示了你放在那里的东西。这是初始化 $CATALINA_OPTS、$JAVA_OPTS 等的合适位置。

PS 一般而言，您应该避免调整可能随提供的包/发行版更新而更改的文件，并且存在替代配置方法。在这种情况下，诸如 catalina.sh、/etc/tomcat7/tomcat7.conf、/etc/init.d/tomcatX 等文件可以是静默更新，您甚至不会注意到您的配置更改已回滚。

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回忆躺在深渊里 2024-11-23 05:45:30

编辑etc/default/tomcat7怎么样

# You may pass JVM startup parameters to Java here. If unset, the default
# options will be: -Djava.awt.headless=true -Xmx128m -XX:+UseConcMarkSweepGC
#
# Use "-XX:+UseConcMarkSweepGC" to enable the CMS garbage collector (improved
# response time). If you use that option and you run Tomcat on a machine with
# exactly one CPU chip that contains one or two cores, you should also add
# the "-XX:+CMSIncrementalMode" option.
JAVA_OPTS="-Djava.awt.headless=true -Xmx1280m -XX:+UseConcMarkSweepGC"

how about editing etc/default/tomcat7

# You may pass JVM startup parameters to Java here. If unset, the default
# options will be: -Djava.awt.headless=true -Xmx128m -XX:+UseConcMarkSweepGC
#
# Use "-XX:+UseConcMarkSweepGC" to enable the CMS garbage collector (improved
# response time). If you use that option and you run Tomcat on a machine with
# exactly one CPU chip that contains one or two cores, you should also add
# the "-XX:+CMSIncrementalMode" option.
JAVA_OPTS="-Djava.awt.headless=true -Xmx1280m -XX:+UseConcMarkSweepGC"

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清风挽心 2024-11-23 05:45:30

另外设置 export JAVA_OPTS="-Dcom.sun.management.jmxremote" 并使用 JConsole 检查tomcats内存消耗情况。

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浮云落日 2024-11-23 05:45:30

转到您的 catalina.sh

在开头添加这些行

JAVA_OPTS="-Djava.awt.headless=true -Dfile.encoding=UTF-8 
-server -Xms512m -Xmx1024m
-XX:NewSize=256m -XX:MaxNewSize=256m -XX:PermSize=256m 
-XX:MaxPermSize=256m -XX:+DisableExplicitGC"

然后使用startup.sh启动您的tomcat

Goto your catalina.sh

Add these line at the beginning

JAVA_OPTS="-Djava.awt.headless=true -Dfile.encoding=UTF-8 
-server -Xms512m -Xmx1024m
-XX:NewSize=256m -XX:MaxNewSize=256m -XX:PermSize=256m 
-XX:MaxPermSize=256m -XX:+DisableExplicitGC"

Then start your tomcat using startup.sh

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