《Flink 内存管理》系列(已完结),共包含以下 4 篇文章:
- Flink 内存管理(一):设置 Flink 进程内存
- Flink 内存管理(二):JobManager 内存分配(含实际计算案例)
- Flink 内存管理(三):TaskManager 内存分配(理论篇)
- Flink 内存管理(四):TaskManager 内存分配(实战篇)
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在 《Flink 内存管理(一):设置 Flink 进程内存》中我们提到,必须使用下述三种方法之一配置 Flink 的内存(本地执行除外),否则 Flink 启动将失败。这意味着必须明确配置以下选项子集之一,这些子集没有默认值。
序号 | for TaskManager | for JobManager |
---|---|---|
1️⃣ | taskmanager.memory.flink.size |
jobmanager.memory.flink.size |
2️⃣ | taskmanager.memory.process.size |
jobmanager.memory.process.size |
3️⃣ |
taskmanager.memory.task.heap.size 和 taskmanager.memory.managed.size
|
jobmanager.memory.heap.size |
1.单独分配 Total Process Size
单独分配 Total Process Size
,其它的组件都会自动分配。
taskmanager.memory.process.size: 2000m
内存分配步骤如下:
- 首先
Total Process Size
= 2000 M = 2000M =2000M - 因为没有显示分配组件中的任何参数,所以
JVM Overhead
= 2000 M × 0.1 = 200 M = 2000M × 0.1 = 200M =2000M×0.1=200M -
JVM Metaspace
= 256 M = 256M =256M - ⭐ 所以
Native Memory
=JVM Overhead
+JVM Metaspace
= 456 M = 456M =456M -
Total Flink Size
= 2000 M − 200 M − 256 M = 1544 M B = 1.508 G B = 2000M - 200M - 256M = 1544MB = 1.508GB =2000M−200M−256M=1544MB=1.508GB -
Network Memory
= 1544 × 0.1 = 154.4 M = 1544 × 0.1 = 154.4M =1544×0.1=154.4M -
Task Off-Heap
= = = 0 M B 0MB 0MB(默认) -
Framework Off-Heap
= = = 128 M 128M 128M(默认) - ⭐ 所以
Total Direct Memory
= 154.4 M + 0 + 128 M = 282.4 M = 154.4M + 0 + 128M = 282.4M =154.4M+0+128M=282.4M -
Managed Memory
= 1544 M B × 0.4 = 617.6 M = 1544MB × 0.4 = 617.6M =1544MB×0.4=617.6M -
Total JVM Heap Memory
= 1544 M − 282.4 M − 617.6 M = 644 M B = 1544M - 282.4M - 617.6M = 644MB =1544M−282.4M−617.6M=644MB -
Framework Heap
= 128 M = 128M =128M -
Task Heap
= 644 M − 128 M = 516 M = 644M - 128M = 516M =644M−128M=516M
可以与以下的日志进行对比,完全能对上,😁😁😁!
2.单独分配 Total Flink Size
taskmanager.memory.flink.size: 2000m
假如直接只分配 taskmanager.memory.flink.size: 2000m
-
Total Flink Size
= 2000 M = 2000M =2000M -
Managed Memory
= 2000 M × 0.4 = 800 M = 2000M × 0.4 = 800M =2000M×0.4=800M -
NetWork Memory
= 2000 M × 0.1 = 200 M = 2000M × 0.1 = 200M =2000M×0.1=200M -
Framework Off-Heap
= 128 M = 128M =128M -
Task Off-Heap
= 0 B y t e = 0 M = 0Byte = 0M =0Byte=0M - ⭐ 所以
Total Direct Memory
= 200 M + 128 M + 0 M = 328 M = 200M + 128M + 0M= 328M =200M+128M+0M=328M -
Total Off-Heap Memory
= 800 M + 328 M = 1128 M = 800M + 328M = 1128M =800M+328M=1128M -
Total JVM Heap
= 2000 M − 800 M − 328 M = 872 M = 2000M - 800M - 328M = 872M =2000M−800M−328M=872M -
Framework Heap
= 128 M = 128M =128M -
Task Heap
= 872 M − 128 M = 744 M = 872M - 128M = 744M =872M−128M=744M -
JVM MetaSpace
= 256 M = 256M =256M(默认) -
JVM Overhead
= ( = ( =(JVM Overhead
+ 256 M +\ 256M + 256MMetaspace
+ 2000 M +\ 2000M + 2000MTotal Flink Size
) × 0.1 ) × 0.1 )×0.1,求解JVM Overhead
= 250.667 M = 250.667M =250.667M 在 192 M B ~ 1 G B 192MB ~ 1GB 192MB~1GB,生效 -
Total Process Size
= 2000 M + 256 M + 250.667 M = 2506.667 M = 2.448 G B = 2000M + 256M + 250.667M = 2506.667M = 2.448GB =2000M+256M+250.667M=2506.667M=2.448GB
3.单独分配 Heap Size && Managed Memory
taskmanager.memory.task.heap.size: 1000m
taskmanager.memory.managed.size: 1000m
-
Framework Heap
= 128 M = 128M =128M(默认) -
Task Heap
= 1000 M = 1000M =1000M(配置) -
Total JVM Heap
= 1000 M + 128 M = 1128 M = 1.102 G B = 1000M + 128M = 1128M = 1.102GB =1000M+128M=1128M=1.102GB -
Managed Memory
= 1000 M = 1000M =1000M(配置) -
Framework Off-Heap
= 128 M = 128M =128M -
Task Off-Heap
= 0 M = 0M =0M -
NetWork
= = =Total Flink Size
× 0.1 ×\ 0.1 × 0.1 = ( = ( =(NetWork
+ 1128 M + 1000 M + 128 M + 0 M ) × 0.1 +\ 1128M + 1000M + 128M + 0M) × 0.1 + 1128M+1000M+128M+0M)×0.1,计算得到Network
= 250.667 M B = 250.667MB =250.667MB,处于 64 M B ~ 1 G B 64MB ~ 1GB 64MB~1GB,有效 - ⭐ 所以
Total Direct Memory
= 128 M + 250.667 M = 378.667 M = 128M + 250.667M = 378.667M =128M+250.667M=378.667M -
Total Flink Size
= 1128 M + 1378.667 M = 2506.667 M = 2.448 G B = 1128M + 1378.667M = 2506.667M = 2.448GB =1128M+1378.667M=2506.667M=2.448GB -
JVM Metaspace
= 256 M = 256M =256M(默认) -
JVM Overhead
= ( = ( =(JVM Overhead
+ 1128 M + 1000 M + 378.667 M + 256 M ) × 0.1 = 306.963 M +\ 1128M + 1000M + 378.667M + 256M) × 0.1 = 306.963M + 1128M+1000M+378.667M+256M)×0.1=306.963M,处于 192 M ~ 1 G B 192M ~ 1GB 192M~1GB,有效 -
Total Process Size
= 2506.667 M + 256 M + 306.963 M = 3069.63 M = 2.998 G = 2506.667M + 256M + 306.963M = 3069.63M = 2.998G =2506.667M+256M+306.963M=3069.63M=2.998G
4.分配 Total Process Size 和 Heap Size && Managed Memory
指定 Total Process Size
,同时显式分配组件 JVM Heap
和 Mamaged Memory
。
taskmanager.memory.process.size: 3000m
taskmanager.memory.task.heap.size: 1000m
taskmanager.memory.managed.size: 1000m
-
Total Process Size
= 3000 M = 3000M =3000M -
Framework Heap
= 128 M = 128M =128M(默认) -
Task Heap
= 1000 M = 1000M =1000M(配置) -
Total JVM Heap
= = =Framework Heap
+ + +Task Heap
= 128 M + 1000 M = 1128 M = 1.102 G = 128M + 1000M = 1128M = 1.102G =128M+1000M=1128M=1.102G -
Managed Memory
= 1000 M = 1000M =1000M(配置) -
Framework Off-Heap
= 128 M = 128M =128M(默认) -
Task Off-Heap
= 0 M = 0M =0M(默认) -
Network Memory
= ( = ( =(Network Memory
+ 1128 M + 1128 M ) × 0.1 = 250.667 M +\ 1128M + 1128M) × 0.1 = 250.667M + 1128M+1128M)×0.1=250.667M,在 64 M ~ 1 G B 64M ~ 1GB 64M~1GB 之间,满足要求 -
Total Off-Heap
= 1000 M + 128 M + 250.667 M + 0 M = 1378.667 M = 1.346 G B = 1000M + 128M + 250.667M + 0M = 1378.667M = 1.346GB =1000M+128M+250.667M+0M=1378.667M=1.346GB -
Total Flink Size
= 1128 M + 1378.667 M = 2506.667 M = 2.448 G B = 1128M + 1378.667M = 2506.667M = 2.448GB =1128M+1378.667M=2506.667M=2.448GB -
JVM Metaspace
= 256 M = 256M =256M -
JVM Overhead
= 3000 M − 2506.667 M − 256 M = 237.333 M = 3000M - 2506.667M - 256M = 237.333M =3000M−2506.667M−256M=237.333M,在 192 M ~ 1 G B 192M ~ 1GB 192M~1GB 之间,满足要求
5.分配 Total Flink Size 和 Heap Size && Managed Memory
指定 Total Flink Size
,同时显式分配组件 JVM Heap
和 Mamaged Memory
。
taskmanager.memory.flink.size: 3000m
taskmanager.memory.task.heap.size: 1000m
taskmanager.memory.managed.size: 1000m
-
Total Flink Size
= 3000 M = 2.93 G B = 3000M = 2.93GB =3000M=2.93GB(配置) -
Managed Memory
= 1000 M = 1000M =1000M(配置) -
Task Heap
= 1000 M = 1000M =1000M(配置) -
Framework Heap
= 128 M = 128M =128M(默认) -
Total JVM Heap
= = =Framework Heap
+Task Heap
= 128 M + 1000 M = 1128 M = 128M + 1000M =1128M =128M+1000M=1128M -
Total Off-Heap Memory
= 3000 M − 1128 M = 1872 M = 1.828 G B = 3000M - 1128M = 1872M = 1.828GB =3000M−1128M=1872M=1.828GB -
Direct Memory
= = =Total Off-Heap Memory
-Managed Memory
= 1872 M − 1000 M = 872 M = 1872M - 1000M = 872M =1872M−1000M=872M -
Task Off-Heap
= 0 M = 0M =0M(默认) -
Framework Off-Heap
= 128 M = 128M =128M(默认) -
Network Memory
= = =Direct Memory
− - −Task Off-Heap
-Framework Off-Heap
= 872 M − 0 M − 128 M = 744 M = 872M - 0M - 128M = 744M =872M−0M−128M=744M -
JVM Metaspace
= 256 M = 256M =256M(默认) -
JVM Overhead
= ( = ( =(JVM Overhead
+ 3000 M + 256 M ) × 0.1 +\ 3000M + 256M) × 0.1 + 3000M+256M)×0.1,计算得到JVM Overhead
= 361.778 M = 361.778M =361.778M,处于 192 M ~ 1 G 192M~1G 192M~1G 之间,符合条件 -
Total Process Size
= 3000 M + 256 M + 361.778 M = 3617.778 M = 3.533 G B = 3000M + 256M + 361.778M = 3617.778M = 3.533GB =3000M+256M+361.778M=3617.778M=3.533GB
文章来源:https://www.toymoban.com/news/detail-839284.html
6.内存分配小结
在 Flink 的集群内存分配的过程中,我们大致可以通过 3 3 3 种方式进行分配。文章来源地址https://www.toymoban.com/news/detail-839284.html
- 指定
Total Process Size
或Total Flink Size
,取决于你用什么方式部署。 - 单独指定某个组件,比如
Task-Heap
的大小,其它的组件都会被推导出来。 - 指定
Total Process / Flink Size
&&Heap
orOff-Heap
其中之一,其它的组件通过默认值进行填充或者进推导,如:-
Total Flink Size
=Total Heap Size
+Total Off-Heap Size
-
Total Heap Size
=Task Heap
+Framework Heap
-
Total Off-Heap
=Task Off-Heap
+Framework Off-Heap
+Network Memory
+Managed Memory
-
Network
=Total Flink Size
× 0.1 ×\ 0.1 × 0.1(没有指定其它组件情况下) -
JVM Overhead
=Total Process Size
× 0.1 ×\ 0.1 × 0.1(没有指定其它组件情况下) - … …
-
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