伺服器性能監控神器nmon使用介紹

2020 年 11 月 8 日
筆記
nmon, 性能監控

介紹

Nmon (Nigel』s Monitor)是由IBM 提供、免費監控 AIX 系統與 Linux 系統資源的工具。該工具可將伺服器系統資源耗用情況收集起來並輸出一個特定的文件,並可利用 excel 分析工具（nmon analyser）進行數據的統計分析。

下載

搜索下載nmon，上傳到伺服器解壓。我用一個比較老的版本給大家演示一下。解壓完有nmon16e_x86_rhel65，和nmon analyser v34a.xls。

nmon16e_x86_rhel65前面是可執行文件，執行結束會生成監控文件，監控文件記錄採集的伺服器硬體指標，後綴是.nmon。
nmon analyser v34a.xls用來將這個監控文件轉化為易讀的Excel表格，帶有圖表。

使用步驟

伺服器處理

啟動nmon的命令如下，啟動後自動後台運行

./nmon16e_x86_rhel65 -f -s 10 -c 999999999 -m ./

若首次執行失敗提示Permission Denied，執行

chmod +x nmon16e_x86_rhel65 即可。

參數解釋：

-s 10 每 10 秒採集一次數據。
-c 999999999 採集 999999999 次硬體數據，表示要長時間採集
-f 生成的數據文件名中包含文件創建的時間。
-m 生成的數據文件的存放目錄為當前目錄。

[root@localhost nmontest]# ./nmon16e_x86_rhel65 -f -s 10 -c 999999999 -m ./
[root@localhost nmontest]# ls -lrt
total 372
-rwxr-xr-x. 1 root root 347506 Jul  1  2016 nmon16e_x86_rhel65
-rw-r--r--. 1 root root  29653 Aug  5 15:02 localhost_200805_1502.nmon

監控文件的名字由「主機名+時間」組成，nmon文件按照取樣間隔，不斷寫入數據

[root@localhost nmontest]# tail -f localhost_200805_1502.nmon
VM,T0004,2,0,0,1247,7428,-1,0,0,0,0,37,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
PROC,T0004,1,0,81.4,-1.0,-1.0,-1.0,0.8,-1.0,-1.0,-1.0
NET,T0004,0.0,0.1,0.0,0.0,0.0,0.1,0.0,0.0
NETPACKET,T0004,0.0,1.5,0.0,0.0,0.0,0.8,0.0,0.0
JFSFILE,T0004,29.6,0.0,1.4,29.6,13.3
DISKBUSY,T0004,0.0,0.0,0.0,0.0,0.0,0.0
DISKREAD,T0004,0.0,0.0,0.0,0.0,0.0,0.0
DISKWRITE,T0004,0.0,0.0,0.0,0.0,0.0,0.0
DISKXFER,T0004,0.0,0.0,0.0,0.0,0.0,0.0

採集結束，關閉nmon

[root@localhost nmontest]# ps -ef | grep nmon
root      5226     1  0 15:02 pts/0    00:00:00 ./nmon16e_x86_rhel65 -f -s 10 -c 999999999 -m ./
root      6626  3519  0 15:24 pts/0    00:00:00 grep --color=auto nmon
[root@localhost nmontest]# kill -9 5226