$ sar 
Linux 2.6.28-ARCH (archer) 	04.03.2009 	_x86_64_	(2 CPU)

00:01:01        CPU     %user     %nice   %system   %iowait    %steal     %idle
00:11:01        all     10,89      0,00      4,66     19,61      0,00     64,84
00:21:01        all      6,79      0,00      2,57      0,13      0,00     90,51
00:31:01        all     12,60      0,00      4,47      1,15      0,00     81,79
00:41:01        all      9,18      0,00      3,25      2,33      0,00     85,24
Średnia:       all      9,87      0,00      3,74      5,80      0,00     80,60
*** glibc detected *** sar: double free or corruption (!prev): 0x0000000001210f40 ***
======= Backtrace: =========
/lib/libc.so.6[0x7ff3faf2c8b8]
/lib/libc.so.6(cfree+0x76)[0x7ff3faf2e3f6]
sar[0x40580b]
sar[0x403185]
/lib/libc.so.6(__libc_start_main+0xe6)[0x7ff3faed8546]
sar[0x401629]
======= Memory map: ========
00400000-00411000 r-xp 00000000 fe:03 311383                             /usr/bin/sar
00610000-00612000 rw-p 00010000 fe:03 311383                             /usr/bin/sar
00612000-00613000 rw-p 00612000 00:00 0 
01210000-01252000 rw-p 01210000 00:00 0                                  [heap]
7ff3f4000000-7ff3f4021000 rw-p 7ff3f4000000 00:00 0 
7ff3f4021000-7ff3f8000000 ---p 7ff3f4021000 00:00 0 
7ff3fa7f1000-7ff3fa807000 r-xp 00000000 fe:03 1130529                    /usr/lib/libgcc_s.so.1
7ff3fa807000-7ff3faa07000 ---p 00016000 fe:03 1130529                    /usr/lib/libgcc_s.so.1
7ff3faa07000-7ff3faa08000 rw-p 00016000 fe:03 1130529                    /usr/lib/libgcc_s.so.1
7ff3faa36000-7ff3faa38000 r--p 00000000 fe:03 1269668                    /usr/share/locale/pl/LC_MESSAGES/sysstat.mo
7ff3faa38000-7ff3faa39000 rw-p 7ff3faa38000 00:00 0 
7ff3faa39000-7ff3faeba000 r--p 00000000 fe:03 1130701                    /usr/lib/locale/locale-archive
7ff3faeba000-7ff3fb004000 r-xp 00000000 fe:00 112739                     /lib/libc-2.9.so
7ff3fb004000-7ff3fb204000 ---p 0014a000 fe:00 112739                     /lib/libc-2.9.so
7ff3fb204000-7ff3fb208000 r--p 0014a000 fe:00 112739                     /lib/libc-2.9.so
7ff3fb208000-7ff3fb209000 rw-p 0014e000 fe:00 112739                     /lib/libc-2.9.so
7ff3fb209000-7ff3fb20e000 rw-p 7ff3fb209000 00:00 0 
7ff3fb20e000-7ff3fb22b000 r-xp 00000000 fe:00 112740                     /lib/ld-2.9.so
7ff3fb3f9000-7ff3fb3fb000 rw-p 7ff3fb3f9000 00:00 0 
7ff3fb429000-7ff3fb42a000 rw-p 7ff3fb429000 00:00 0 
7ff3fb42a000-7ff3fb42b000 r--p 0001c000 fe:00 112740                     /lib/ld-2.9.so
7ff3fb42b000-7ff3fb42c000 rw-p 0001d000 fe:00 112740                     /lib/ld-2.9.so
7fff03417000-7fff0342c000 rw-p 7ffffffea000 00:00 0                      [stack]
7fff035ff000-7fff03600000 r-xp 7fff035ff000 00:00 0                      [vdso]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0                  [vsyscall]