使用Weblogic版本:Weblogic 11g(10.3.6)
设置Weblogic的线程数有两种方法,
第一种,通过启动参数设置:
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-Dweblogic.threadpool.MinPoolSize=1000 -Dweblogic.threadpool.MaxPoolSize=1000
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可以加在setDomainEnv.sh文件JAVA_OPTIONS下面;
第二种,通过config.xml配置文件:
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<server>
<name>AdminServer</name>
<self-tuning-thread-pool-size-min>1000</self-tuning-thread-pool-size-min>
<self-tuning-thread-pool-size-max>1000</self-tuning-thread-pool-size-max>
</server>
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Window环境下设置完应该直接重新启动就可以生效,Linux下,有可能会出现以下错误:
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Attempting to allocate 4G bytes
There is insufficient native memory for the Java
Runtime Environment to continue.
Possible reasons:
The system is out of physical RAM or swap space
In 32 bit mode, the process size limit was hit
Possible solutions:
Reduce memory load on the system
Increase physical memory or swap space
Check if swap backing store is full
Use 64 bit Java on a 64 bit OS
Decrease Java heap size (-Xmx/-Xms)
Decrease number of Java threads
Decrease Java thread stack sizes (-Xss)
Disable compressed references (-XXcompressedRefs=false)
java.lang.OutOfMemoryError: Resource temporarily unavailable in tsStartJavaThread (lifecycle.c:1097).
Attempting to allocate 4G bytes
There is insufficient native memory for the Java
Runtime Environment to continue.
Possible reasons:
The system is out of physical RAM or swap space
In 32 bit mode, the process size limit was hit
Possible solutions:
Reduce memory load on the system
Increase physical memory or swap space
Check if swap backing store is full
Use 64 bit Java on a 64 bit OS
Decrease Java heap size (-Xmx/-Xms)
Decrease number of Java threads
Decrease Java thread stack sizes (-Xss)
Disable compressed references (-XXcompressedRefs=false)
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出现这个原因的问题可能是因为Linux下系统对用户的默认线程数做了限制,可以通过:
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ulimit -a
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命令进行查看:
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core file size (blocks, -c) 0
data seg size (kbytes, -d) unlimited
scheduling priority (-e) 0
file size (blocks, -f) unlimited
pending signals (-i) 515223
max locked memory (kbytes, -l) 64
max memory size (kbytes, -m) unlimited
open files (-n) 1024
pipe size (512 bytes, -p) 8
POSIX message queues (bytes, -q) 819200
real-time priority (-r) 0
stack size (kbytes, -s) 10240
cpu time (seconds, -t) unlimited
max user processes (-u) 1024
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited
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其中
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max user processes (-u) 1024
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表示当前系统允许的最大线程数,可以把此参数设大一些。
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ulimit -u 5000
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设置当前系统用户最大允许的线程数,只对本次会话有效,如果想要永久生效,可以通过修改:
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$ cat /etc/security/limits.d/90-nproc.conf
# Default limit for number of user's processes to prevent
# accidental fork bombs.
# See rhbz #432903 for reasoning.
* soft nproc 1024
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只需要将1024改成你需要的值即可,设置完需要重启系统已生效。