由於用的個人的linux服務器,配置是1核2G的內存,然後個人搭建環境跑的公司的項目。
項目能正常啓動,但是在輸入網址,進行項目訪問的時候,總是報ava.lang.OutOfmemoryError: PermGen Space內存溢出的異常
網上查要修改tomcat的配置,來將運行時候的內存減小,達到不會報錯的目的。
但由於是spring boot 項目,是內置的tomcat,沒有地方去修改tomcat的配置(個人理解,如果不對望大家指出,謝謝)
最後找到一篇非常好的博客,解決了問題。
https://blog.csdn.net/rickiyeat/article/details/78343362
在使用java -jar 啓動的時候
-Xms1024m -Xmx1024m -Xss1024K -XX:PermSize=128m -XX:MaxPermSize=256m
將運行時的內存提前定義好,這樣就達到修改內置tomcat運行時內存的目的。
nohup java -Xms1024m -Xmx1024m -Xss1024K -XX:PermSize=128m -XX:MaxPermSize=256m -jar xxxx.jar > /dev/null 2>&1 &
最後我們查一下內存使用情況
jmap -heap pid(ps -ef|grep java查看啓動項目的pid是什麼)
Attaching to process ID 14824, please wait...
Debugger attached successfully.
Server compiler detected.
JVM version is 24.80-b11
using thread-local object allocation.
Mark Sweep Compact GC
Heap Configuration:
MinHeapFreeRatio = 40
MaxHeapFreeRatio = 70
MaxHeapSize = 536870912 (512.0MB)
NewSize = 1310720 (1.25MB)
MaxNewSize = 17592186044415 MB
OldSize = 5439488 (5.1875MB)
NewRatio = 2
SurvivorRatio = 8
PermSize = 134217728 (128.0MB)
MaxPermSize = 268435456 (256.0MB)
G1HeapRegionSize = 0 (0.0MB)
Heap Usage:
New Generation (Eden + 1 Survivor Space):
capacity = 161021952 (153.5625MB)
used = 149734416 (142.79786682128906MB)
free = 11287536 (10.764633178710938MB)
92.9900638640873% used
Eden Space:
capacity = 143130624 (136.5MB)
used = 143113880 (136.4840316772461MB)
free = 16744 (0.01596832275390625MB)
99.98830159505208% used
From Space:
capacity = 17891328 (17.0625MB)
used = 6620536 (6.313835144042969MB)
free = 11270792 (10.748664855957031MB)
37.00416201636905% used
To Space:
capacity = 17891328 (17.0625MB)
used = 0 (0.0MB)
free = 17891328 (17.0625MB)
0.0% used
tenured generation:
capacity = 357957632 (341.375MB)
used = 71209248 (67.91043090820312MB)
free = 286748384 (273.4645690917969MB)
19.893205685303002% used
Perm Generation:
capacity = 134217728 (128.0MB)
used = 99136528 (94.54396057128906MB)
free = 35081200 (33.45603942871094MB)
73.86246919631958% used
在最後能看出 內存佔用率 Perm Generation:
73.86246919631958% used。
到這裏能正常的運行和操作項目了。