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linux_wiki:sar [2014/12/03 22:08] billdozor |
linux_wiki:sar [2019/05/25 23:50] (current) |
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| ====== sar (system activity report) ====== | ====== sar (system activity report) ====== | ||
| + | |||
| + | **General Information** | ||
| + | |||
| sar is used for displaying collected activity counters of various OS stats, including CPU, memory, swap, and disk I/O. | sar is used for displaying collected activity counters of various OS stats, including CPU, memory, swap, and disk I/O. | ||
| - | sar is a command provided by the sysstat package. | + | **Checklist** |
| + | * Distro(s): Any | ||
| + | * Package: | ||
| + | |||
| + | ---- | ||
| ===== Installation and Configuration ===== | ===== Installation and Configuration ===== | ||
| Line 25: | Line 32: | ||
| Look for a line like this to edit: | Look for a line like this to edit: | ||
| + | < | ||
| # Activity reports every 10 minutes everyday | # Activity reports every 10 minutes everyday | ||
| 5-55/10 * * * * root command -v debian-sa1 > /dev/null && debian-sa1 1 1 | 5-55/10 * * * * root command -v debian-sa1 > /dev/null && debian-sa1 1 1 | ||
| + | </ | ||
| 4) Start the service | 4) Start the service | ||
| Line 45: | Line 54: | ||
| After sysstat has collected data for a while, you can start to view the information with sar. | After sysstat has collected data for a while, you can start to view the information with sar. | ||
| - | === Log location === | + | ==== Log location |
| Sar logs to either: | Sar logs to either: | ||
| * / | * / | ||
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| ---- | ---- | ||
| - | === CPU Utilization === | + | ==== CPU Utilization |
| < | < | ||
| sar -u (displays for current day until that point) | sar -u (displays for current day until that point) | ||
| Line 90: | Line 99: | ||
| ---- | ---- | ||
| - | === Memory (RAM) Stats === | + | ==== Memory (RAM) Stats ==== |
| < | < | ||
| sar -r (display todays memory stats) | sar -r (display todays memory stats) | ||
| Line 111: | Line 120: | ||
| ---- | ---- | ||
| - | === Swap Stats === | + | ==== Swap Stats ==== |
| < | < | ||
| sar -S (todays swap usage) | sar -S (todays swap usage) | ||
| Line 133: | Line 142: | ||
| ---- | ---- | ||
| - | === Disk I/O === | + | ==== Disk I/O ==== |
| < | < | ||
| sar -b (todays disk I/O and transfer rates) | sar -b (todays disk I/O and transfer rates) | ||
| Line 155: | Line 164: | ||
| ---- | ---- | ||
| - | === Network Stats === | + | ==== Network Stats ==== |
| < | < | ||
| sar -n TYPE (todays network statistics) | sar -n TYPE (todays network statistics) | ||
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| ---- | ---- | ||
| - | === Start and End === | + | ==== Start and End ==== |
| Report only specfic time periods | Report only specfic time periods | ||