sysstat
The sysstat package contains the sar, sadf, iostat, nfsiostat, cifsiostat, mpstat, and pidstat commands for Linux. The sar command collects and reports system activity information. The statistics reported by sar concern I/O transfer rates, paging activity, process-related activites, interrupts, network activity, memory and swap space utilization, CPU utilization, kernel activities, and TTY statistics, among others. The sadf command may be used to display data collected by sar in various formats. The iostat command reports CPU statistics and I/O statistics for tty devices and disks. The pidstat command reports statistics for Linux processes. The mpstat command reports global and per-processor statistics. The nfsiostat command reports I/O statistics for network filesystems. The cifsiostat command reports I/O statistics for CIFS filesystems.
| Tags | Monitoring Systems Administration |
|---|---|
| Licenses | GPL |
| Operating Systems | POSIX Linux |
| Implementation | C |
Recent releases
- 27 Nov 2011 22:03
Release Notes: A new output format has been added to sadf: JSON (JavaScript Object Notation). Several bugs have been fixed in sadf XML output, DTD, and XSD documents. A random crash with iostat -N has been fixed.
- 28 Aug 2011 20:31
Release Notes: sadf has been modified to make it easier to add new report formats. The option "-P ON" has been added to mpstat, which tells mpstat to display stats only for online CPUs. pidstat displayed null statistics for processes that had terminated; this is now fixed.
- 03 Jun 2011 22:31
Release Notes: A new option has been added to sar: it can now take a snapshot of all the USB devices currently plugged into the system. The option -h has been added to iostat to make the device utilization report easier to read with long device names. A bug has been fixed with cifsiostat that didn't count open files from the "Posix Open" column in the /proc/fs/cifs/Stats file. NLS has been updated: an Esperanto translation has been added.
- 15 Mar 2011 15:14
Release Notes: Several bugs have been fixed with the nfsiostat and cifsiostat commands. Sysstat's commands are no longer linked with the sensors library if it is not needed. iostat incorrectly mapped device-mapper IDs greater than 256: This is now fixed. NLS has been updated and an Ukrainian translation has been added.
- 27 Dec 2010 01:32
Release Notes: sar now tells sadc to read only the necessary groups of activities. New metrics have been added to sar (number of tasks waiting for I/O to complete, and amount of active and inactive memory). nfsiostat now takes into account the POSIXLY_CORRECT environment variable. sar and iostat no longer assume that device-mapper major number is 253 (it gets the real number from the /proc/devices file).
Recent comments
Re: report sar7.16 problem and attach patch for it
Thanks for this patch. It has been included in sysstat 8.0.0.
report sar7.16 problem and attach patch for it
Hello, Mr.Sebastien Godard .
When I used sar7.16,I found a problem.
After adding the parameters "-s 23:59:45 -e 00:00:15",it means sar will read the records at 23:59:45~00:00:15 from sarfile,but
the result is that sar only read the records at 23:59:45-23:59:55 from sarfile,the records after 00:00:00 didn't read from sarfile.
I have made a patch to solve the problem.
To repeat this problem,you could do as following:
Step1:run the script
----------------------------------------------------------------------
#!/bin/sh
DATE=`date +%m%d%H%M%S`
date -s 23:59:45
echo "Now time has been set "`date`
echo "Sar starts to write in sar.$DATE "
sar 5 10 -o ./sar.$DATE
hwclock --hctosys
-----------------------------------------------------------------------
After running,it will create a sarfile.
Step2:read created sarfile
Sar Version: sar 7.16
[root@localhost sysstat-7.1.6]# sar -V
sysstat version 7.1.6
(C) Sebastien Godard (sysstat <at> wanadoo.fr)
[root@localhost sysstat-7.1.6]# sar -f testsar/sar.0810000205
Linux (localhost.localdomain) 08/10/2007
23:59:45 CPU %user %nice %system %iowait %steal %idle
23:59:50 all 4.19 0.00 6.59 0.00 0.00 89.22
23:59:55 all 8.02 0.20 11.42 0.00 0.00 80.36
00:00:00 all 5.59 0.00 9.58 0.00 0.00 84.83
00:00:05 all 4.60 0.40 6.60 0.00 0.00 88.40
00:00:10 all 4.61 0.00 6.61 0.00 0.00 88.78
00:00:15 all 3.99 0.20 9.58 2.20 0.00 84.03
00:00:20 all 4.80 0.20 8.20 0.60 0.00 86.20
00:00:25 all 4.39 0.20 6.39 0.00 0.00 89.02
00:00:30 all 4.21 0.00 7.62 0.00 0.00 88.18
00:00:35 all 4.39 0.20 7.39 0.20 0.00 87.82
00:00:40 all 4.20 0.20 7.40 0.00 0.00 88.20
00:00:45 all 7.80 0.00 9.20 1.00 0.00 82.00
Average: all 5.06 0.13 8.05 0.33 0.00 86.42
Created sarfile starts with 23:59:45 ends with 00:00:45
Step3:Problem turn out
[root@localhost sysstat-7.1.6]# sar -f testsar/sar.0810000205 -s 23:59:45 -e 00:00:15
Linux (localhost.localdomain) 08/10/2007
The bug can be fixed with the following patch:
Signed-off-by: "Yu Yongcong" <yuyc@cn.fujitsu.com>
--- sysstat-7.1.6/sar.c.orig 2007-08-14 08:09:28.000000000 +0800
+++ sysstat-7.1.6/sar.c 2007-08-14 10:13:47.000000000 +0800
@@ -840,6 +840,13 @@
set_timestamp(!curr, cur_time[!curr], 16);
/* Set current timestamp */
set_timestamp(curr, cur_time[curr], 16);
+
+ if (tm_start.use && file_stats[!curr].ust_time
+ && (file_stats[curr].ust_time > file_stats[!curr].ust_time)
+ && (file_stats[curr].hour < file_stats[!curr].hour)) {
+ file_stats[curr].hour += 24;
+ rectime.tm_hour += 24;
+ }
/* Check time (2) */
if (use_tm_start && (datecmp(&rectime, &tm_start) < 0))
@@ -1622,6 +1629,9 @@
((interval < 0) && !from_file[0] && !to_file[0]))
set_default_file(&rectime, from_file);
+ if (tm_start.use && tm_end.use && (tm_end.tm_hour < tm_start.tm_hour))
+ tm_end.tm_hour += 24;
+
/*
* Check option dependencies
*/
Here is the output after the fix:
[root@localhost sysstat-7.1.6]#sar -f testsar/sar.0810000205 -s 23:59:45 -e 00:00:15
Linux (localhost.localdomain) 08/10/2007
23:59:45 CPU %user %nice %system %iowait %steal %idle
23:59:50 all 4.19 0.00 6.59 0.00 0.00 89.22
23:59:55 all 8.02 0.20 11.42 0.00 0.00 80.36
00:00:00 all 5.59 0.00 9.58 0.00 0.00 84.83
00:00:05 all 4.60 0.40 6.60 0.00 0.00 88.40
00:00:10 all 4.61 0.00 6.61 0.00 0.00 88.78
00:00:15 all 3.99 0.20 9.58 2.20 0.00 84.03
Average: all 5.16 0.13 8.40 0.37 0.00 85.94
That's all.
Best Regards.
Re: fix for spec file
OK: spec file updated with sysstat 5.1.4.
Re: compile errors on 2.6
> Hey, just tried to do an rpmbuild
> --rebuild on 5.1.3
>
> noticed that the build failed because
> MAX_BLKDEV isn't defined for 2.6
> kernels, for some reason it was removed
> from major.h.
Yes: MAX_BLKDEV was removed from linux/major.h in 2.6 kernels. Sysstat 5.1.4 has been updated to take this into account.
Re: after all that, sar doesn't work
> pseries-loaner:/usr/src/packages/SOURCES/sysstat-5.1.3
> # ./sar -u 2 5
> exec: No such file or directory
>
This is because sar tries to launch its data collector (sadc) and doesn't find it. Enter "make install" after compiling to install each component in its directory before using sar.
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