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- sar - system activity reporter
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- ssssaaaarrrr [----uuuubbbbddddDDDDFFFFyyyyccccwwwwaaaaqqqqvvvvmmmmpppprrrrttttgggghhhhIIIIAAAAUUUUTTTTRRRR] [----oooo file] t [ n ]
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- ssssaaaarrrr [----uuuubbbbddddDDDDFFFFyyyyccccwwwwaaaaqqqqvvvvmmmmpppprrrrttttgggghhhhIIIIAAAAUUUUTTTTRRRR] [----ssss time] [----eeee time] [----iiii sec] [----ffff file]
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- DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
- _s_a_r, in the first instance, samples cumulative activity counters in the
- operating system at _n intervals of _t seconds, where _t should be 5 or
- greater. If the ----oooo option is specified, it saves the samples in _f_i_l_e in
- binary format. The default value of _n is 1. In the second instance,
- with no sampling interval specified, ssssaaaarrrr extracts data from a previously
- recorded _f_i_l_e, either the one specified by ----ffff option or, by default, the
- standard system activity daily data file ////vvvvaaaarrrr////aaaaddddmmmm////ssssaaaa////ssssaaaa_d_d for the current
- day _d_d. The starting and ending times of the report can be bounded via
- the ----ssss and ----eeee _t_i_m_e arguments of the form _h_h[:_m_m[:_s_s]]. The ----iiii option
- selects records at _s_e_c second intervals. Otherwise, all intervals found
- in the data file are reported.
-
- In either case, subsets of data to be printed are specified by option:
-
- ----uuuu Report CPU utilization (the default):
- The system-wide average of the statistics reported by -U.
-
- ----UUUU Report per-CPU utilization statistics:
- %usr, %sys, %intr, %wio, %idle, %sbrk - portion of each cpu's time
- running in user mode, running in system mode, processing interrupts,
- idle and waiting for I/O, completely idle or idle with some process
- waiting because system memory is scarce, respectively. These six
- percentages add up to 100%. The time that the processor spent in
- ``idle waiting for I/O'' state is further broken down into the
- following categories:
- %wfs - waiting for filesystem I/O
- %wswp - waiting for swap I/O to complete
- %wphy - waiting for physio other than swapping
- %wgsw - waiting for graphics context switch to complete
- %wfif - waiting while graphics pipe too full
- These five numbers add up to 100% of the %wio time.
-
- Prior to the IRIX 6.5.13 release, a processor was considered
- ``waiting for I/O'' if it was idle and there was any I/O outstanding
- on the system. Beginning with the IRIX 6.5.13 release, a processor
- is only considered ``waiting for I/O'' if it is idle and any of the
- outstanding I/O was initiated on that particular processor. Reports
- generated from system activity daily data files (////vvvvaaaarrrr////aaaaddddmmmm////ssssaaaa////ssssaaaa_d_d)
- created prior to the IRIX 6.5.13 release will reflect the old data.
- This change results in no difference on uniprocessor machines.
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- SSSSAAAARRRR((((1111)))) SSSSAAAARRRR((((1111))))
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- ----bbbb Report buffer activity:
- bread/s, bwrit/s - basic blocks transferred between system buffers
- and disk or other block devices;
- lread/s, lwrit/s - basic blocks transferred from system buffers to
- user memory;
- wcncl/s - pending writes in system buffers cancelled;
- %rcach, %wcach - cache hit ratios, that is, (1-bread/lread) as a
- percentage;
- pread/s, pwrit/s - basic block transfers via raw (physical) device
- mechanism.
-
- ----dddd See also ----DDDD and ----FFFF below. Report activity for block devices (i.e.
- disk drives). The activity data reported is:
- device - /dev/dsk device name (sans parition)
- %busy - % of time device was busy performing I/O requests;
- avque - average number of I/O requests outstanding;
- r+w/s - number of read AND write I/O requests per second;
- blks/s - number of 512-byte blocks (basic block) read AND written;
- w/s - number of write I/O requests per second;
- blks/s - number of 512-byte blocks (basic block) written;
- avwait - average time in ms. that I/O requests wait idly on queue;
- avserv - average time in ms. to service I/O requests (which for
- disks includes seek, rotational latency and data transfer time).
-
- ----DDDD This option is identical to ----dddd above except that it does not report
- idle disks (disks that transferred no data blocks).
-
- ----FFFF This option is only meaningful in conjunction with ----dddd or ----DDDD. It is
- designed to be used with fabric devices that have long names that
- would make line formatting uneven. It causes the device name to be
- printed on the right of the output lines rather than on the left.
-
- ----yyyy Report TTY device activity:
- rawch/s, canch/s, outch/s - input character rate, input character
- rate processed by canon, output character rate;
- rcvin/s, xmtin/s, mdmin/s - receive, transmit and modem interrupt
- rates.
-
- ----cccc Report system calls:
- scall/s - system calls of all types;
- sread/s, swrit/s, fork/s, exec/s - specific system calls;
- rchar/s, wchar/s - characters transferred by read and write system
- calls.
-
- ----wwww Report system swapping and switching activity:
- swpin/s, swpot/s, bswin/s, bswot/s - number of transfers and number
- of 512-byte units transferred for swapins and swapouts (including
- initial loading of some programs);
- pswpout/s - process swapouts
- pswch/s - process (user thread) switches.
- kswch/s - kernel thread switches.
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- ----gggg Report graphics activity:
- gcxsw/s - graphics context switches per second
- ginpt/s - graphics input driver calls per second
- gintr/s - graphics interrupts other than FIFO interrupts per second
- fintr/s - FIFO too full interrupts per second
- swpbf/s - swap buffers calls per second
-
- ----aaaa Report use of file access system routines:
- iget/s, namei/s, dirblk/s.
-
- ----qqqq Report average queue length while occupied, and % of time occupied:
- runq-sz, %runocc - run queue of processes in memory and runnable;
- swpq-sz, %swpocc - swap queue of processes swapped out but ready to
- run;
- wioq-sz, %wioocc - queue of processes waiting for I/O.
-
- Prior to the IRIX 6.5.13 release, %wioocc was the percent of wall-
- clock time that any process was waiting for I/O. Beginning with the
- IRIX 6.5.13 release, %wioocc is the average of each processor's time
- spent with I/O outstanding.
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- The reported wioq-sz also changed. Prior to the IRIX 6.5.13
- release, it was the average number of processes on the system
- waiting for I/O when any wio queue was occupied. It is now the
- weighted average of the average length of each processor's wio queue
- when that queue is occupied, weighted by the amount of time that
- that queue was occupied.
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- In reports generated with a current ssssaaaarrrr from data files from before
- this change, and in reports generated with an old ssssaaaarrrr from new data
- files, the %wioocc field is invalid.
-
- ----vvvv Report status of process, i-node, file tables and record lock
- tables:
- proc-sz, inod-sz, file-sz, lock-sz - entries/size for each table,
- evaluated once at sampling point;
- ov - overflows that occur between sampling points for each table.
-
- ----mmmm Report message and semaphore activities:
- msg/s, sema/s - primitives per second.
-
- ----pppp Report paging activities:
- vflt/s - address translation page faults (valid page not in memory);
- dfill/s - address translation fault on demand fill or demand zero
- page;
- cache/s - address translation fault page reclaimed from page cache;
- pgswp/s - address translation fault page reclaimed from swap space;
- pgfil/s - address translation fault page reclaimed from filesystem;
- pflt/s - (hardware) protection faults -- including illegal access to
- page and writes to (software) writable pages;
- cpyw/s - protection fault on shared copy-on-write page;
- steal/s - protection fault on unshared writable page;
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- rclm/s - pages reclaimed by paging daemon.
- Dfill, cache, pgswp, and pgfil are subsets of vflt; cpyw and steal
- are subsets of pflt.
-
- ----tttt Report translation lookaside buffer (TLB) activities:
- tflt/s - user page table or kernel virtual address translation
- faults: address translation not resident in TLB;
- rflt/s - page reference faults (valid page in memory, but hardware
- valid bit disabled to emulate hardware reference bit);
- sync/s - TLBs flushes on all processors;
- vmwrp/s - syncs caused by clean (with respect to TLB) kernel virtual
- memory depletion;
- flush/s - single processor TLB flushes;
- idwrp/s - flushes because TLB ids have been depleted;
- idget/s - new TLB ids issued;
- idprg/s - tlb ids purged from process;
- vmprg/s - individual TLB entries purged.
-
- ----rrrr Report unused memory pages and disk blocks:
- freemem - average pages available to user processes;
- freeswap - disk blocks available for process swapping;
- vswap - virtual pages available to user processes.
-
- ----hhhh Report system heap statistics:
- heapmem - amount of memory currently allocated to all kernel dynamic
- heaps (block managed arenas, general zone heaps, and private zone
- heaps);
- overhd - block managed arena overhead;
- unused - block managed arena memory available for allocation;
- alloc/s - number of allocation requests per second;
- free/s - number of free requests per second.
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- ----IIII Report interrupt statistics:
- intr/s - non-vme interrupts per second;
- vmeintr/s - vme interrupts per second;
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- ----RRRR Report memory statistics
- physmem - physical pages of memory on system;
- kernel - pages in use by the kernel;
- user - pages in use by user programs;
- fsctl - pages in use by filesystem to control buffers;
- fsdelwr - pages in use by filesystem for delayed-write buffers;
- fsdata - pages in use by filesystem for read-only data buffers;
- freedat - pages of free memory that may be reclaimable;
- empty - pages of free memory that are empty.
-
- ----AAAA Report all data. Equivalent to ----uuuuddddqqqqbbbbwwwwccccaaaayyyyvvvvmmmmpppprrrrttttgggghhhhIIIIUUUURRRR.
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- ----TTTT Report total counts instead of just percentages or per-second
- values. The counts are calculated by taking the difference between
- the start and end values in the data file.
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- EEEEXXXXAAAAMMMMPPPPLLLLEEEESSSS
- To see today's CPU activity so far:
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- sar
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- To watch CPU activity evolve for 10 minutes and save data:
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- sar -o temp 60 10
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- To later review disk activity from that period:
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- sar -d -f temp
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- To show total disk activity from that period:
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- sar -T -d -f temp
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- FFFFIIIILLLLEEEESSSS
- /var/adm/sa/sa_d_d
- daily data file, where _d_d are digits representing the day
- of the month.
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- SSSSEEEEEEEE AAAALLLLSSSSOOOO
- gr_osview(1), osview(1), sar(1M)
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