Implementations 13 Bloomberg Dependency Injection System Analysis Component Injection Trade Security Broker Pricing Sizing Sending Execute Trade Cancel Trade Reprice Trade Dependency Injection Data proc.apply(data); } bool processB(Data& data, ...) { // ... Processor& proc = ProcessorSingleton::instance->getProcessor(proc_tag); // ... return proc.apply(...); } Class Handler { }; Object construction bidYield_, askYield_); //... } protected: // ExtraFields std::optional<Broker> bidBroker_; std::optional<Broker> askBroker_; std::optional bidYield_; std::optional askYield_;

interface to bind the virtual IP to using ha.interface. The virtual IP will be bound to a TiProxy instance only when both of these configuration items are set. For more information, see documentation. ${tag_name} • To start a TiDB cluster of the latest version with 1 TiDB instance, 1 TiKV instance, 1 PD instance, and 1 TiFlash instance, run the following command: tiup playground • To specify the TiDB ${tag_name} • To start a TiDB cluster of the latest version with 1 TiDB instance, 1 TiKV instance, 1 PD instance, and 1 TiFlash instance, run the following command: tiup playground 95 • To specify the TiDB

empty EndKey #52574 @3pointer 59 • Fix the issue that a PD connection failure could cause the TiDB instance where the log backup advancer owner is located to panic #52597 @YuJuncen • Fix the issue that log ${tag_name} • To start a TiDB cluster of the latest version with 1 TiDB instance, 1 TiKV instance, 1 PD instance, and 1 TiFlash instance, run the following command: tiup playground • To specify the TiDB ${tag_name} • To start a TiDB cluster of the latest version with 1 TiDB instance, 1 TiKV instance, 1 PD instance, and 1 TiFlash instance, run the following command: tiup playground 92 • To specify the TiDB

${tag_name} • To start a TiDB cluster of the latest version with 1 TiDB instance, 1 TiKV instance, 1 PD instance, and 1 TiFlash instance, run the following command: tiup playground • To specify the TiDB ${tag_name} • To start a TiDB cluster of the latest version with 1 TiDB instance, 1 TiKV instance, 1 PD instance, and 1 TiFlash instance, run the following command: tiup playground 92 • To specify the TiDB examples only. In your actual deployment, replace the IP addresses with your actual IP addresses. 94 Instance Count IP Configuration TiKV 3 10.0.1.1 10.0.1.1 10.0.1.1 Avoid con- flict be- tween the port and

PD 发送请求的网络耗时 TiDB Statement OPS：SQL 执行数量统计（包含 select、insert、update 等） Duration：SQL 执行的时间 QPS By Instance：每个 TiDB 上的 QPS Failed Query OPM：失败 SQL 的统计，例如语法错误、主键冲突等 Connection count：每个 TiDB 的连接数 Heap Memory Prometheus 后生效。 1. # syncer 2. ALERT syncer_status 3. IF syncer_binlog_file{node='master'} - ON(instance, job) syncer_binlog_file{node='syncer'} > 1 4. FOR 1m 5. LABELS {channels="alerts", env="test-cluster"} syncer_binlog_file{node='master'} - ON(instance, job) 配置 Syncer 监控与告警 Syncer - 318 - 本文档使用 书栈(BookStack.CN) 构建 syncer_binlog_file{node='syncer'} > 1 instance: {{ $labels.instance }} values: {{ $value }}", 9

ble �→ _instance_plan_cache-new-in-v840">Instance-level execution plan cache �→ (experimental) Instance-level plan cache allows all sessions within the same TiDB �→ instance to share the documentation. 45 • Support instance-level execution plan cache (experimental) #54057 @qw4990 Instance-level execution plan cache allows all sessions within the same TiDB instance to share the execution plan mutations, and maintains stable cluster performance. Compared with session-level ex- ecution plan cache, instance-level execution plan cache offers the following advantages: • Eliminates redundancy, caching more

ble �→ _instance_plan_cache-new-in-v840">Instance-level execution plan cache �→ (experimental) Instance-level plan cache allows all sessions within the same TiDB �→ instance to share the documentation. 40 • Support instance-level execution plan cache (experimental) #54057 @qw4990 Instance-level execution plan cache allows all sessions within the same TiDB instance to share the execution plan mutations, and maintains stable cluster performance. Compared with session-level ex- ecution plan cache, instance-level execution plan cache offers the following advantages: • Eliminates redundancy, caching more

.. 逻辑资源按需扩缩容 MQ集群 MQ集群 根据Load等Metrics做 出扩容决策 PV1 Broker1 PV2 Broker2 PV3 Broker3 PV4 Broker4 MQ集群 根据Load等 Metrics做出 扩容决策 PV1 PV3 Broker1 PV2 PV4 Broker2 漂移 物理资源按需扩缩容 高级能力-云原生中间件-应用的基石-MQ为例-2-Mesh化 Citadel Mixer Pliot Galley Injector MQ Broker Envoy MQ Broker Envoy MQ Broker Envoy 注册 Service Service Service Pub sub Pub sub Pub sub xDS Config • MQ Broker把Envoy作为 它与服务之间的代理 • Envoy拓展兼容了PubSub 通信的协议，比如

monitored: node_exporter_port: 9100 blackbox_exporter_port: 9115 server_configs: 69 tidb: instance.tidb_slow_log_threshold: 300 tikv: readpool.storage.use-unified-pool: false readpool.coprocessor execute() 更多信息参考更新数据。 删除数据 #### 删除单个对象 player = Player.get(Player.name == "test") player.delete_instance() #### 批量删除多个对象 Player.delete().where(Player.coins == 100).execute() 更多信息参考删除数据。 4.3.3.5.4 下一步 4 步：运行代码并查看结果 运行以下命令，执行示例代码： npm start 预期输出结果（部分）： 169 INFO (app/10117): Getting sequelize instance... Executing (default): SELECT 1+1 AS result Executing (default): DROP TABLE IF EXISTS `players`;

rowspan="4">可扩展性和性能 实例级执行计划缓存（实验特性） 实例级执行计划缓存允许同一个 TiDB 实例的所有会话共享执行计划缓存。 变 量tidb_enable_instance_plan_cache 开启该功能，并通过系统变量tidb_instance_plan_cache_max_size 设 置其最大内存使用量。开启该功能之前，请关闭会话级别的Prepare 语句执行计划缓存和非 Prepare 语句执行 计划缓存。 更多信息，请参考[用户文档](#tidb_enable_instance_plan_cache-从-v840-版本开始引入)。 更多信息，请参考用户文档。 2.2.1.7 安全 • BR 支持 AWS IMDSv2 #16443 @pingyu 在 Amazon EC2 上部署 TiDB 时，BR 支持 AWS 的 Instance Metadata Service Version 2 (IMDSv2)。你可以在 EC2 实例 上进行相关配置，使 BR 可以使用与实例关联的 IAM 角色以适当的权限访问 Amazon S3。