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# 可修改的 Flink 配置属性
<a name="reference-modifiable-settings"></a>

以下是您可以使用[支持案例](https://console.aws.amazon.com/support/home#/)修改的 Flink 配置设置。通过指定应用程序前缀，您可以一次修改多个属性，也可以同时修改多个应用程序的属性。如果您要修改此列表之外的其他 Flink 配置属性，根据您的具体情况指定确切的属性。

## 重新启动策略
<a name="reference-modifiable-settings-fault-tolerance"></a>

从 Flink 1.19 及更高版本开始，我们默认使用 `exponential-delay` 重新启动策略。默认情况下，所有以前的版本都使用 `fixed-delay` 重新启动策略。

`restart-strategy:`

`restart-strategy.fixed-delay.delay:`

`restart-strategy.exponential-delay.backoff-muliplier:`

`restart-strategy.exponential-delay.initial-backoff:`

`restart-strategy.exponential-delay.jitter-factor:`

`restart-strategy.exponential-delay.reset-backoff-threshold:`

## 检查点和状态后端
<a name="reference-modifiable-settings-checkpoints-state-backends"></a>

`state.backend.type:`

`state.backend.fs.memory-threshold:`

`state.backend.incremental:`

## 检查点
<a name="reference-modifiable-settings-checkpointing"></a>

`execution.checkpointing.unaligned:`

`execution.checkpointing.interval-during-backlog:`

## RocksDB 原生指标
<a name="reference-modifiable-settings-rocksdb"></a>

RocksDB 原生指标不提供给。 CloudWatch启用后，可以通过 Flink 控制面板或使用自定义工具通过 Flink REST API 访问这些指标。

适用于 Apache Flink 的托管服务允许客户使用 [API 以只读模式访问最新的 Flink REST API](https://nightlies.apache.org/flink/flink-docs-release-1.18/docs/ops/rest_api/)（或您正在使用的支持的版本）。[CreateApplicationPresignedUrl](https://docs.aws.amazon.com/managed-flink/latest/apiv2/API_CreateApplicationPresignedUrl.html)此 API 由 Flink 自己的控制面板使用，但也可以由自定义监控工具使用。

`state.backend.rocksdb.metrics.actual-delayed-write-rate:`

`state.backend.rocksdb.metrics.background-errors:`

`state.backend.rocksdb.metrics.block-cache-capacity:`

`state.backend.rocksdb.metrics.block-cache-pinned-usage:`

`state.backend.rocksdb.metrics.block-cache-usage:`

`state.backend.rocksdb.metrics.column-family-as-variable:`

`state.backend.rocksdb.metrics.compaction-pending:`

`state.backend.rocksdb.metrics.cur-size-active-mem-table:`

`state.backend.rocksdb.metrics.cur-size-all-mem-tables:`

`state.backend.rocksdb.metrics.estimate-live-data-size:`

`state.backend.rocksdb.metrics.estimate-num-keys:`

`state.backend.rocksdb.metrics.estimate-pending-compaction-bytes:`

`state.backend.rocksdb.metrics.estimate-table-readers-mem:`

`state.backend.rocksdb.metrics.is-write-stopped:`

`state.backend.rocksdb.metrics.mem-table-flush-pending:`

`state.backend.rocksdb.metrics.num-deletes-active-mem-table:`

`state.backend.rocksdb.metrics.num-deletes-imm-mem-tables:`

`state.backend.rocksdb.metrics.num-entries-active-mem-table:`

`state.backend.rocksdb.metrics.num-entries-imm-mem-tables:`

`state.backend.rocksdb.metrics.num-immutable-mem-table:`

`state.backend.rocksdb.metrics.num-live-versions:`

`state.backend.rocksdb.metrics.num-running-compactions:`

`state.backend.rocksdb.metrics.num-running-flushes:`

`state.backend.rocksdb.metrics.num-snapshots:`

`state.backend.rocksdb.metrics.size-all-mem-tables:`

## RocksDB 选项
<a name="reference-modifiable-settings-rocksdb-options"></a>

`state.backend.rocksdb.compaction.style:`

`state.backend.rocksdb.memory.partitioned-index-filters:`

`state.backend.rocksdb.thread.num:`

## 高级状态后端选项
<a name="reference-modifiable-settings-advanced-state-backends-options"></a>

`state.storage.fs.memory-threshold:`

## 完整 TaskManager 选项
<a name="reference-modifiable-settings-full-task-manager-options"></a>

`task.cancellation.timeout:`

`taskmanager.jvm-exit-on-oom:`

`taskmanager.numberOfTaskSlots:`

`taskmanager.slot.timeout:`

`taskmanager.memory.network.fraction:`

`taskmanager.memory.network.max:`

`taskmanager.network.request-backoff.initial:`

`taskmanager.network.request-backoff.max:`

`taskmanager.network.memory.buffer-debloat.enabled:`

`taskmanager.network.memory.buffer-debloat.period:`

`taskmanager.network.memory.buffer-debloat.samples:`

`taskmanager.network.memory.buffer-debloat.threshold-percentages:`

## 内存配置
<a name="reference-modifiable-settings-memory-configuration"></a>

`taskmanager.memory.jvm-metaspace.size:`

`taskmanager.memory.jvm-overhead.fraction:`

`taskmanager.memory.jvm-overhead.max:`

`taskmanager.memory.managed.consumer-weights:`

`taskmanager.memory.managed.fraction:`

`taskmanager.memory.network.fraction:`

`taskmanager.memory.network.max:`

`taskmanager.memory.segment-size:`

`taskmanager.memory.task.off-heap.size:`

## RPC /Akka
<a name="reference-modifiable-settings-RPC-Akka"></a>

`akka.ask.timeout:`

`akka.client.timeout:`

`akka.framesize:`

`akka.lookup.timeout:`

`akka.tcp.timeout:`

## 客户端
<a name="reference-modifiable-settings-client"></a>

`client.timeout:`

## 高级集群选项
<a name="reference-modifiable-settings-advanced-cluster-options"></a>

`cluster.intercept-user-system-exit:`

`cluster.processes.halt-on-fatal-error:`

## 文件系统配置
<a name="reference-modifiable-settings-advanced-filesystem-configurations"></a>

`fs.s3.connection.maximum:`

`fs.s3a.connection.maximum:`

`fs.s3a.threads.max:`

`s3.upload.max.concurrent.uploads:`

## 高级容错选项
<a name="reference-modifiable-settings-advanced-fault-tolerance-options"></a>

`heartbeat.timeout:`

`jobmanager.execution.failover-strategy:`

## 内存配置
<a name="reference-modifiable-settings-memory-configuration"></a>

`jobmanager.memory.heap.size:`

## 指标
<a name="reference-modifiable-settings-metrics"></a>

`metrics.latency.interval:`

## REST 端点和客户端的高级选项
<a name="reference-modifiable-settings-rest"></a>

`rest.flamegraph.enabled:`

`rest.server.numThreads:`

## 高级SSL 安全选项
<a name="reference-modifiable-settings-ssl"></a>

`security.ssl.internal.handshake-timeout:`

## 高级计划选项
<a name="reference-modifiable-settings-scheduling"></a>

`slot.request.timeout:`

## Flink Web 用户界面的高级选项
<a name="reference-modifiable-settings-webui"></a>

`web.timeout:`