内容简介:容器中的JVM资源该如何被安全的限制?
cat /proc/meminfo
MemTotal: 197869260KB
MemFree: 3698100KB
MemAvailable: 62230260KB
docker run -it --rm alpine cat /proc/meminfo
MemTotal: 197869260KB
MemFree: 3677800KB
MemAvailable: 62210088KB
#free -g
total used free shared buff/cache available
Mem: 188 122 1 0 64 64
docker run -m 4GB --rm openjdk:8-jre-slim java -XshowSettings:vm -version
docker run -m 4GB --rm openjdk:9-jre-slim java -XshowSettings:vm -version
docker run -m 4GB --rm openjdk:10-jre-slim java -XshowSettings:vm -version
docker run -m 4GB --rm openjdk:11-jre-slim java -XshowSettings:vm -version
docker run -m 4GB --rm openjdk:12 java -XshowSettings:vm -version
[root@xiaoke-test ~]# docker run -m 4GB --rm openjdk:8-jre-slim java -XshowSettings:vm -version
VM settings:
Max. Heap Size (Estimated): 26.67G
Ergonomics Machine Class: server
Using VM: OpenJDK 64-Bit Server VM
openjdk version "1.8.0_181"
OpenJDK Runtime Environment (build 1.8.0_181-8u181-b13-2~deb9u1-b13)
OpenJDK 64-Bit Server VM (build 25.181-b13, mixed mode)
[root@xiaoke-test ~]# docker run -m 4GB --rm openjdk:8-jre-slim java -XX:+UnlockExperimentalVMOptions -XX:+UseCGroupMemoryLimitForHeap -XshowSettings:vm -version
VM settings:
Max. Heap Size (Estimated): 910.50M
Ergonomics Machine Class: server
Using VM: OpenJDK 64-Bit Server VM
openjdk version "1.8.0_181"
OpenJDK Runtime Environment (build 1.8.0_181-8u181-b13-2~deb9u1-b13)
OpenJDK 64-Bit Server VM (build 25.181-b13, mixed mode)
[root@xiaoke-test ~]# docker run -m 4GB --rm openjdk:9-jre-slim java -XshowSettings:vm -version
VM settings:
Max. Heap Size (Estimated): 29.97G
Using VM: OpenJDK 64-Bit Server VM
openjdk version "9.0.4"
OpenJDK Runtime Environment (build 9.0.4+12-Debian-4)
OpenJDK 64-Bit Server VM (build 9.0.4+12-Debian-4, mixed mode)
[root@xiaoke-test ~]# docker run -m 4GB --rm openjdk:9-jre-slim java -XX:+UnlockExperimentalVMOptions -XX:+UseCGroupMemoryLimitForHeap -XshowSettings:vm -version
VM settings:
Max. Heap Size (Estimated): 1.00G
Using VM: OpenJDK 64-Bit Server VM
openjdk version "9.0.4"
OpenJDK Runtime Environment (build 9.0.4+12-Debian-4)
OpenJDK 64-Bit Server VM (build 9.0.4+12-Debian-4, mixed mode)
[root@xiaoke-test ~]# docker run -m 32GB --rm openjdk:10-jre-slim java -XshowSettings:vm -XX:MaxRAMFraction=1 -version
VM settings:
Max. Heap Size (Estimated): 1.00G
Using VM: OpenJDK 64-Bit Server VM
openjdk version "10.0.2" 2018-07-17
OpenJDK Runtime Environment (build 10.0.2+13-Debian-2)
OpenJDK 64-Bit Server VM (build 10.0.2+13-Debian-2, mixed mode)
[root@xiaoke-test ~]# docker run -m 4GB --rm openjdk:11-jre-slim java -XshowSettings:vm -version
VM settings:
Max. Heap Size (Estimated): 1.00G
Using VM: OpenJDK 64-Bit Server VM
openjdk version "11.0.1" 2018-10-16
OpenJDK Runtime Environment (build 11.0.1+13-Debian-3)
OpenJDK 64-Bit Server VM (build 11.0.1+13-Debian-3, mixed mode, sharing)
[root@xiaoke-test ~]# docker run -m 4GB --rm openjdk:12 java -XshowSettings:vm -version
VM settings:
Max. Heap Size (Estimated): 1.00G
Using VM: OpenJDK 64-Bit Server VM
openjdk version "12-ea" 2019-03-19
OpenJDK Runtime Environment (build 12-ea+23)
OpenJDK 64-Bit Server VM (build 12-ea+23, mixed mode, sharing)
docker run -m 4GB --rm adoptopenjdk/openjdk8-openj9:alpine-slim java -XshowSettings:vm -version
docker run -m 4GB --rm adoptopenjdk/openjdk9-openj9:alpine-slim java -XshowSettings:vm -version
docker run -m 4GB --rm adoptopenjdk/openjdk10-openj9:alpine-slim java -XshowSettings:vm -version
docker run -m 4GB --rm adoptopenjdk/openjdk11-openj9:alpine-slim java -XshowSettings:vm -version
[root@xiaoke-test ~]# docker run -m 4GB --rm adoptopenjdk/openjdk8-openj9:alpine-slim java -XshowSettings:vm -version
VM settings:
Max. Heap Size (Estimated): 3.00G
Ergonomics Machine Class: server
Using VM: Eclipse OpenJ9 VM
openjdk version "1.8.0_192"
OpenJDK Runtime Environment (build 1.8.0_192-b12_openj9)
Eclipse OpenJ9 VM (build openj9-0.11.0, JRE 1.8.0 Linux amd64-64-Bit Compressed References 20181107_95 (JIT enabled, AOT enabled)
OpenJ9 - 090ff9dcd
OMR - ea548a66
JCL - b5a3affe73 based on jdk8u192-b12)
[root@xiaoke-test ~]# docker run -m 4GB --rm adoptopenjdk/openjdk9-openj9:alpine-slim java -XshowSettings:vm -version
VM settings:
Max. Heap Size (Estimated): 3.00G
Using VM: Eclipse OpenJ9 VM
openjdk version "9.0.4-adoptopenjdk"
OpenJDK Runtime Environment (build 9.0.4-adoptopenjdk+12)
Eclipse OpenJ9 VM (build openj9-0.9.0, JRE 9 Linux amd64-64-Bit Compressed References 20180814_248 (JIT enabled, AOT enabled)
OpenJ9 - 24e53631
OMR - fad6bf6e
JCL - feec4d2ae based on jdk-9.0.4+12)
[root@xiaoke-test ~]# docker run -m 4GB --rm adoptopenjdk/openjdk10-openj9:alpine-slim java -XshowSettings:vm -version
VM settings:
Max. Heap Size (Estimated): 3.00G
Using VM: Eclipse OpenJ9 VM
openjdk version "10.0.2-adoptopenjdk" 2018-07-17
OpenJDK Runtime Environment (build 10.0.2-adoptopenjdk+13)
Eclipse OpenJ9 VM (build openj9-0.9.0, JRE 10 Linux amd64-64-Bit Compressed References 20180813_102 (JIT enabled, AOT enabled)
OpenJ9 - 24e53631
OMR - fad6bf6e
JCL - 7db90eda56 based on jdk-10.0.2+13)
[root@xiaoke-test ~]# docker run -m 4GB --rm adoptopenjdk/openjdk11-openj9:alpine-slim java -XshowSettings:vm -version
VM settings:
Max. Heap Size (Estimated): 3.00G
Using VM: Eclipse OpenJ9 VM
openjdk version "11.0.1" 2018-10-16
OpenJDK Runtime Environment AdoptOpenJDK (build 11.0.1+13)
Eclipse OpenJ9 VM AdoptOpenJDK (build openj9-0.11.0, JRE 11 Linux amd64-64-Bit Compressed References 20181020_70 (JIT enabled, AOT enabled)
OpenJ9 - 090ff9dc
OMR - ea548a66
JCL - f62696f378 based on jdk-11.0.1+13)
JavaMemory (MaxRAM) = 元数据+线程+代码缓存+OffHeap+Heap...
MaxRAMFraction取值 堆占比 容器内存=1G 容器内存=2G 容器内存=4G 容器内存=8G 容器内存=16G
1 ≈90% 910.50M 1.78G 3.56G 7.11G 14.22G
2 ≈50% 455.50M 910.50M 1.78G 3.56G 7.11G
3 ≈33% 304.00M 608.00M 1.19G 2.37G 4.74G
4 ≈25% 228.00M 455.50M 910.50M 1.78G 3.56G
容器内存<size> 最大Java堆大小
小于1GB 50%<size>
1GB-2GB
-512MB
大于2GB 大于2GB
以上所述就是小编给大家介绍的《容器中的JVM资源该如何被安全的限制?》,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对 码农网 的支持!
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- 容器中的JVM资源该如何被安全的限制?
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