PowerFlex： SVM vm.overcommit 最佳實務

Summary: 本文提供如何檢查 vm.overcommit_memory 和 vm.overcommit_ratio 設定，以及如何修改設定以符合最佳實務的指示。

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Instructions

若要檢查及/或修改 SVM vm.overcommit 設定，請按照下列步驟操作：

1.使用 SSH 以 root

身分登入 SVM 2.執行 cat /etc/sysctl.conf |grep “vm.overcommit”
Ex. 
[root@sds-node logs]# cat /etc/sysctl.conf | grep "vm.overcommit"
vm.overcommit_memory = 2
vm.overcommit_ratio = 50

3、執行下列命令 
sed -i 's/vm\.overcommit_memory = .*/vm\.overcommit_memory = 2/g' /etc/sysctl.conf
sed -i 's/vm\.overcommit_ratio = .*/vm\.overcommit_ratio = 100/g' /etc/sysctl.conf
sysctl -p

驗證 
[root@sds-node logs]# cat /etc/sysctl.conf | grep "vm.overcommit"
vm.overcommit_memory = 2
vm.overcommit_ratio = 100

在環境中的所有 SVM 上重複這些步驟，以確保它們設置為建議的最佳實踐設置。您無需將 SDS 置於維護模式即可執行此操作。 
 
 

Affected Products

PowerFlex rack
Article Properties
Article Number: 000198177
Article Type: How To
Last Modified: 26 Nov 2025
Version:  7
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