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CaitinChenlilin90
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Update wording (#446)
* Update wording * Add "the" before "TiDB services"
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FAQ.md

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@@ -158,7 +158,7 @@ You need to set the `--config` parameter in TiKV/PD to make the `toml` configura
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##### Should I deploy the TiDB monitoring framework (Prometheus + Grafana) on a standalone machine or on multiple machines? What is the recommended CPU and memory?
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The monitoring machine is recommended to use standalone deployment. It is recommended to use a 8 core CPU with 16 GB+ memory and a 500 GB+ hard disk.
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The monitoring machine is recommended to use standalone deployment. It is recommended to use an 8 core CPU with 16 GB+ memory and a 500 GB+ hard disk.
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##### Why the monitor cannot display all metrics?
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ansible-playbook rolling_update.yml
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```
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#### What is the effect of rolling udpates?
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#### How are the rolling updates done?
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When you apply rolling updates to TiDB services, the running application is not affected. You need to configure the minimum cluster topology (TiDB * 2, PD * 3, TiKV * 3). If the Pump/Drainer service is involved in the cluster, it is recommended to stop Drainer before rolling updates. When you update TiDB, Pump is also updated.
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When you apply rolling updates to the TiDB services, the running application is not affected. You need to configure the minimum cluster topology (TiDB * 2, PD * 3, TiKV * 3). If the Pump/Drainer service is involved in the cluster, it is recommended to stop Drainer before rolling updates. When you update TiDB, Pump is also updated.
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#### How to upgrade when I deploy TiDB using Binary?
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