外⽹代理服务访问监控组件，配置外⽹代理时需注意不要开放不必要的端⼝，避免⽹络安全事故。 代理节点 代理节点 TiDB服务集群提供两个Proxy节点，⽤以代理Dashboard/Grafana/Prometheus服务 您可以通过‘详情’⻚中的节点列表中选择‘PROXY’查询到当前节点代理地址 配置访问代理 配置访问代理 Dashboard/监控访问 分布式NewSQL数据库 TiDB Copyright /etc/nginx/nginx.conf 在 http 中添加下⾯配置： # prometheus proxy upstream prometheus_server { server 10.9.163.206:9090; # 使⽤详情中PROXY prometheus 地址 server 10.9.174.142:9090; # 使⽤详情中PROXY prometheus 地址 } server { listen 9090; 9090; # 端⼝⾃定，注意防⽕墙开放端⼝ location / { proxy_pass http://prometheus_server/; } } # grafana proxy Dashboard/监控访问 分布式NewSQL数据库 TiDB Copyright © 2012-2021 UCloud 优刻得 44/120 upstream grafana_server { server 10.9

tidb_enable_tso_follower_proxy �→ Newly added Determines whether to enable or disable the TSO Follower Proxy feature. The default value is OFF, which means the TSO Follower Proxy feature is disabled. At timestamp processing flow and reduces the timestamp processing load of PD by enabling PD Follower Proxy and modifying the batch waiting time required when the PD client requests TSO in batches. This helps disabling PD Follower Proxy through the system variable tidb_enable_tso_follower_proxy. Suppose that the TSO requests load of PD is too high. In this case, enabling PD follower proxy can batch forward the

ser- vice port TiFlash20170 the Ti- Flash Proxy ser- vice port 119 Component Default Port Description TiFlash20292 the port for Prometheus to pull Ti- Flash Proxy met- rics TiFlash 8234 the port for Prometheus often has things to do with the use of a proxy. You can add pressure on single TiDB server, sum each result up and compare the summed result with the result with proxy. Take HAproxy as an example. The parameter versions of HAproxy also support nbthread and cpu-map. All of these can mitigate the negative impact of proxy use on performance. 186 4.6.1.3.2 Under high concurrency, why is the CPU utilization rate of TiKV

documentation. 40 2.2.1.4 Availability • Support the proxy component TiProxy (experimental) #413 @djshow832 @xhebox TiProxy is the official proxy component of TiDB, located between the client and TiDB now includes tiproxy �→ -{version}-linux-{arch}.tar.gz, which is the installation package for the proxy com- ponent TiProxy. 2.2.4 Deprecated features • Support for the TLSv1.0 and TLSv1.1 protocols is e- cu- tion Frame- work (DXF) tasks Y Y N N N N N N N N N PD Fol- lower Proxy (con- trolled by tidb_enable_tso_follower_proxy �→ ) Y Y Y Y Y Y Y N N N N Active PD Fol- lower (con- trolled by pd_ena

without worrying about incorrectly terminating other queries or sessions by mistake when there is a proxy between the client and TiDB. Currently, TiDB does not support using Ctrl+C to terminate queries or it.), Spring auto- matically wraps all objects with the @Transactional annotation in a proxy and uses this proxy for object invocation processing. You can simply assume that when the agent calls a function clean up connections after a specific idle period (determined by the proxy’s idle configuration). In addition to monitoring the proxy’s idle configuration, connection pools also need to maintain or probe

ser- vice port TiFlash20170 the Ti- Flash Proxy ser- vice port 95 Component Default Port Description TiFlash20292 the port for Prometheus to pull Ti- Flash Proxy met- rics TiFlash 8234 the port for Prometheus often has things to do with the use of a proxy. You can add pressure on single TiDB server, sum each result up and compare the summed result with the result with proxy. Take HAproxy as an example. The parameter versions of HAproxy also support nbthread and cpu-map. All of these can mitigate the negative impact of proxy use on performance. 154 4.6.1.3.2 Under high concurrency, why is the CPU utilization rate of TiKV

Frame- work (DXF) tasks Y Y Y Y N N N N N N N PD Fol- lower Proxy (con- trolled by tidb �→ _ �→ enable �→ _ �→ tso �→ _ �→ follower �→ _ �→ proxy �→ ) Y Y Y Y Y Y Y Y Y Y N N 106 Management, ob- serv- clean up connections after a specific idle period (determined by the proxy’s idle configuration). In addition to monitoring the proxy’s idle configuration, connection pools also need to maintain or probe that this connection was idle for a long time and then closed by the proxy. The usual solution is to increase the value of the proxy’s idle configuration and allow the connection pool to: • Check whether

Frame- work (DXF) tasks Y Y Y Y N N N N N N N PD Fol- lower Proxy (con- trolled by tidb �→ _ �→ enable �→ _ �→ tso �→ _ �→ follower �→ _ �→ proxy �→ ) Y Y Y Y Y Y Y Y Y Y N N 101 Management, ob- serv- clean up connections after a specific idle period (determined by the proxy’s idle configuration). In addition to monitoring the proxy’s idle configuration, connection pools also need to maintain or probe that this connection was idle for a long time and then closed by the proxy. The usual solution is to increase the value of the proxy’s idle configuration and allow the connection pool to: • Check whether

3 8.2 8.1 7.5 7.1 6.5 6.1 5.4 5.3 5.2 5.1 PD Fol- lower Proxy (con- trolled by tidb �→ _ �→ enable �→ _ �→ tso �→ _ �→ follower �→ _ �→ proxy �→ ) Y Y Y Y Y Y Y Y Y N N Active PD Fol- lower (con- trolled clean up connections after a specific idle period (determined by the proxy’s idle configuration). In addition to monitoring the proxy’s idle configuration, connection pools also need to maintain or probe that this connection was idle for a long time and then closed by the proxy. The usual solution is to increase the value of the proxy’s idle configuration and allow the connection pool to: • Check whether

tools 8.1 7.5 7.1 6.5 6.1 5.4 5.3 5.2 5.1 PD Fol- lower Proxy (con- trolled by tidb �→ _ �→ enable �→ _ �→ tso �→ _ �→ follower �→ _ �→ proxy �→ ) Y Y Y Y Y Y Y N N Active PD Fol- lower (con- trolled clean up connections after a specific idle period (determined by the proxy’s idle configuration). In addition to monitoring the proxy’s idle configuration, connection pools also need to maintain or probe that this connection was idle for a long time and then closed by the proxy. The usual solution is to increase the value of the proxy’s idle configuration and allow the connection pool to: • Check whether