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AIX10


第十单元

性能监测

简介

调整方法
1. Stress System 2. Measure Subsystems 3. Identify Predominant Bottleneck 4.Tune bottleneck 5. Repeat... forever

No Diffe

rence

瓶颈定义
CPU bound Disk I/O bound Application disk bound Paging space low Paging bound vmstat vmstat iostat lsps -a iostat vmstat when %user + %sys greater than 80% when %iowait greater than 40% (AIX 4.3.3 or later) when %tm_act greater than 70% when used paging space greater than 70% active paging logical volumes %tm_act greater than 30% of the I/O (iostat) and paging activity greater than 10 * the number of CPUs (vmstat) rising page outs, CPU wait and run queue

Thrashing

vmstat sar

系统性能分析工具
CPU vmstat, iostat topas/nmon ps sar time/timex netpmon 内存 vmstat topas/nmon ps svmon lsps filemon 磁盘 iostat topas/nmon lvmstat,iostat -d lvmstat lsps filemon lsattr,lsdev lspv,lslv ,lsvg trace,trcrpt trace,trcrpt trace,trcrpt trace,trcrpt 网络 netstat topas/nmon entstat nfsstat ifconfig iptrace, ipreport

性能调整工具
CPU schedtune/ schedo nice,renice bindprocessor bindintcpu chdev setpri 内存 磁盘 网络 no nfso chdev ifconfig

vmtune/vmo,ioovmtune/vmo,ioo chps,mkps fdpr chdev rmss chdev migratepv chlv reorgvg

监视 CPU 使用情况
1

- vmstat
cpu ----------us sy id wa 57 32 0 10 48 37 0 16 55 36 0 9 0 0 0 0 0 0 0 0 0 0

# vmstat 2 kthr memory page faults ----- ----------- ------------------------ -----------r b avm fre re pi po fr sr cy in sy cs 1 0 22478 1677 0 0 0 0 0 0 188 1380 157 1 0 22506 1609 0 0 0 0 0 0 214 1476 186 0 0 22498 1582 0 0 0 0 0 0 248 1470 226 2 2 2 3 2 2 1 1 0 0 0 0 1 22534 22534 22534 22534 22557 1465 1445 1426 1410 1365 1356 1350 1293 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 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

238 903 239 77 23 209 1142 205 72 28 189 1220 212 74 26 255 1704 268 70 30 383 977 216 72 28

0 22541 0 22524 0 22546

0 237 1418 209 63 33 0 241 1348 179 52 32 0 217 1473 180 51 35

0 4 0 16 0 14

监视 CPU 使用情况
# iostat -t 2 6 tty: tin 0.0 0.0 0.0 0.0 0.0 0.0

- iostat
% user 8.4 4.5 7.0 9.0 7.5 10.0 % sys 2.6 3.0 4.0 2.5 1.0 3.5 % idle 88.5 92.1 89.0 88.5 91.5 80.5 % iowait 0.5 0.5 0.0 0.0 0.0 6.0

1

tout 0.8 80.2 40.5 40.5 40.5 40.5

avg-cpu:

CPU 统计信息列(% user、% sys、% idle、和 % iowait)提供了一个关于 CPU 使 用的细目分类。

监视 CPU 使用情况
# sar -P ALL 2 3 17:30:50 cpu %usr 17:30:52 0 8 1 0 2 0 3 0 2 17:30:54 0 12 1 0 2 0 3 0 3 17:30:56 0 11 1 0 2 0 3 0 3 Average 0 10 1 0 2 0 3 0 3

- sar
%idle 0 96 99 100 74 0 97 99 100 74 0 97 100 100 74 0 96 99 100 74

1

%sys 92 4 1 0 24 88 3 1 0 23 89 3 0 0 23 90 4 1 0 24

%wio 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

可以了解到每个CPU 的使用情况

监视内存使用情况
1
r 1 0 0 0 0 1 0 0 0 b 3 3 3 2 3 5 3 3 4 avm 113726 113643 113659 113661 113662 113858 113969 113682 113701 fre re pi po 124 0 14 6 346 0 2 14 135 0 2 2 122 0 3 2 128 0 10 3 238 0 35 1 127 0 5 10 121 0 20 9 124 0 3 29 fr 151 208 108 120 134 146 153 154 228

- vmstat
sr cy 600 0 690 0 323 0 375 0 432 0 422 0 529 0 470 0 635 0 in 521 585 516 527 644 599 565 608 674 sy 5533 2201 1563 1622 1434 5103 2006 1569 1730 cs 816 866 797 871 948 903 823 1007 1086 us sy id wa 23 13 7 57 16 9 2 73 25 7 2 66 13 7 2 79 22 7 4 67 40 16 0 44 19 8 3 70 15 8 0 77 18 9 0 73

# vmstat 2 10 kthr memory page faults cpu ----- ----------- ------------------------ ------------ -----------

avm = active virtual memory fre = number of free memory pages pi = number of page ins per second po = number of page outs per second fr = freed pages per second sr = scanned pages per second

监视内存使用情况
1
# ps aux USER PID %CPU %MEM root 516 94.9 0.0 root 17306 2.4 7.0 /usr/lpp/X11/bin/ root 33852 0.7 0.0 root 33486 0.5 2.0 /afs/austin.ibm.c root 1032 0.2 0.0 root 31404 0.1 1.0 rlogin root 29776 0.1 1.0 elm

- ps
STIME Mar 15 Mar 15 TIME 2503:26 62:35 COMMAND kproc

SZ RSS TTY STAT 8 8 - A 11840 8504 - A 568 2144 64 1128 964 620 pts/9 A 2136 pts/7A 56 1144 856 ? ? A A A

14:47:29 0:01 14:15:15 0:11 Mar 15 6:09 15:16:55 1:39 12:56:18 0:07

/usr/bin/ksh

kproc aixterm -e aixterm -e

RSS: refers to the real-memory (resident set) size in kilobytes of the process. SZ: the virtual size (in paging space) in kilobytes of the data section of the process + TSIZ refers to the size of the text section of the executable file. %MEM

由内存中工作段和代码段的和的 4 倍计算得到(就是说,RSS 的值),再除以机器 实际内存的容量(单位 KB ),再乘以 100 ,凑整到最接近的百分点。

监视内存使用情况
1
# svmon -G size memory 1048576 pg space 958464 work 96647 135232 inuse 149991 1857 pers 0 48

- svmon
pin 96647 virtual 135570

free 898585

pin in use

clnt 0 14711

整体 (-G) :显示整个系统中实际内存和字分页空间的使用的统计信息。 进程 (-P) :显示活动进程的存储使用策略。 段 (-S) :显示在某一特定的程序段数或者降序显示最高十位使用内存的进程。 段的详细信息 (-D) :显示某一特定段的详细信息。
In AIX Version 5.1, svmon is packaged as part of the perfagent.tools fileset and in bos.perf.tools fileset in AIX 5.2.??

监视内存使用情况
1
# svmon -Pau 10
Pid 15012 2750 15706 17172 21150 17764 2910 19334 13664 17520 ????±ê??·?: 15012 ?ü??: maker4X.exe Segid 1572 142 1bde 2c1 9ab 404 1d9b 909 5a3 1096 1b9d 1af8 0 Type pers pers pers pers pers work work work work work work clnt work Description /dev/hd3:62 /dev/hd3:51 /dev/hd3:50 /dev/hd3:49 /dev/hd2:53289 kernel extension lib data shared library text sreg[4] sreg[3] private kernel Inuse 0 0 0 1 1 27 39 864 9 32 1057 961 1792 Pin 0 0 0 0 0 27 0 0 0 0 1 0 1146 Pgspace 0 0 0 0 0 0 23 7 12 32 1219 0 3488 Command maker4X.exe X dtwm dtsession dtterm aixterm dtterm dtterm dtterm aixterm Inuse 4783 4353 3257 2986 2941 2862 2813 2813 2804 2801

- svmon
Pin 1174 1178 1174 1174 1174 1174 1174 1174 1174 1174 Pgspace 4781 5544 4003 3827 3697 3644 3705 3704 3706 3619

Address Range 0..-1 0..-1 0..-1 0..7 0..0 0..24580 0..607 0..65535 0..32768 0..32783 0..1306 : 65307..65535 0..1716 0..32767 : 32768..65535

以下命令显示了使用内存最多的十个进程的统计信息。如果您不指定一个数值,它 将显示所有当前在系统中运行进程。

使用rmss 使用rmss 命令
To change memory size # rmss -c 32 Simulated memory size changed to 32 Mb. To display the current memory size: # rmss -p Simulated memory size is 32 Mb. To reset the memory size to the real size: # rmss -r Simulated memory size changed to 192 Mb.

监视I/O 监视I/O 使用情况

- iostat

# iostat 5 tty: tin tout avg-cpu: % user % sys % idle % iowait 0.0 0.4 0.2 0.4 99.3 0.1 Disks: % tm_act Kbps tps Kb_read Kb_wrtn hdisk0 0.2 1.4 0.1 300366 211075 hdisk1 0.0 0.0 0.0 8 0 hdisk2 0.0 0.0 0.0 8 0 cd0 0.1 0.1 0.0 42844 0 tty: tin tout avg-cpu: % user % sys % idle % iowait 0.0 145.6 0.4 12.7 0.0 86.9 Disks: % tm_act Kbps tps Kb_read Kb_wrtn hdisk0 94.8 303 4.3 47.4 15232 0 hdisk1 0.0 0.0 0.0 0 0 hdisk2 0.0 0.0 0.0 0 0 cd0 0.0 0.0 0.0 0 0 if activity for a disk is greater than 70%, then you may get higher performance by moving some of that disks’s activity to another disk or spreading the I/O across multiple disk drives..

监视I/O 监视I/O 使用情况
# sar -d 3 3 AIX konark 3 4 0002506F4C00 12:09:50 device %busy 12:09:53 hdisk0 1 hdisk1 0 cd0 0 12:09:56 hdisk0 hdisk1 cd0 hdisk0 hdisk1 cd0 hdisk0 hdisk1 cd0 0 0 0 1 0 0 0 0 0

-

sar -d
blks/s 5 1 0 0 1 0 4 1 0 3 1 0 avwait 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 avserv 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

08/26/99 avque r+w/s 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 0.0 0 0 0 1 0 0 0 0 0

12:09:59

Average

监视I/O 监视I/O 使用情况 - filemon
# # # # # filemon -O lv,pv -o fmon.out dd if=/dev/rhdisk0 of=/dev/null bs=32k count=100 dd if=/dev/zero of=/tmp/junk bs=32k count=100 trcstop

valid -O options: lf,vm,lv,pv,all lf: monitor logical file I/O vm: monitor virtual memory I/O lv: monitor logical volume I/O pv: monitor physical volume I/O all: short for lf,vm,lv,pv (default is: vm,lv,pv) # more fmon.out

关于iowait 关于iowait
iowait is a form of idle time - the iowait statistic is simply the percentage of time the CPU is idle AND there is at least one I/O still in progress (started from that CPU) The iowait value seen in the output of commands like vmstat, iostat, and topas is the iowait percentages across all CPUs averaged together High I/O wait does not mean that there is definitely an I/O bottleneck Zero I/O wait does not mean that there is not an I/O bottleneck A CPU in I/O wait state can still execute threads if there are any runable threads

监视网络使用情况
网络接口统计 # netstat -i
Name lo0 lo0 tr0 tr0 en0 en0 Mtu 16896 16896 1492 1492 1500 1500

- netstat -i
Opkts Oerrs 144946 0 144946 0 247355 0 247355 0 112 0 112 0 Coll 0 0 0 0 0 0

Network Address Ipkts Ierrs <Link> 144834 0 127 localhost 144834 0 <Link>10.0.5a.4f.3f.61658339 0 9.3.1 ah6000d 658339 0 <Link>8.0.5a.d.a2.d5 0 0 1.2.3 1.2.3.4 0 0

-If the Oerrs column from netstat -i is greater than 1% of Opkts, the

send queue size (xmt_que_size) for that interface should be increased. use # lsattr -El adapter to check -If Ierrs is greater than 1% of Ipkts, then execute netstat -m to check for a lack of memory.

监视网络使用情况
网络内存使用情况 #netstat -m

- netstat -m

2434 mbufs in use: 2432 mbuf cluster pages in use 10336 Kbytes allocated to mbufs 0 requests for mbufs denied 0 calls to protocol drain routines 0 sockets not created because sockthresh was reached 内核分配统计信息: ******* CPU 0 ******* By size inuse calls failed delayed free hiwat freed 32 419 544702 0 0 221 800 0 64 173 22424 0 0 19 400 0 128 121 37130 0 0 135 200 4 256 1201 118326233 0 0 239 480 138 ... AIX5L中 thewall 的值是无法修改的,是在系统启动时就确定的: 32-位核心 - thewall 取值为 1/2 物理内存 与 1GB 中的最小值,即最大为1GB。 64-位核心 - thewall 取值为 1/2 物理内存 与 65GB 中的最小值,即最大为65GB。

监视网络使用情况

- netstat -v

正在运行的每一个基于通用数据链接接口设备驱动程序的统计信息 #netstat -v
ETHERNET STATISTICS (ent0) : Device Type: IBM 10/100 Mbps Ethernet PCI Adapter (23100020) Hardware Address: 00:60:94:e9:29:18 Elapsed Time: 9 days 19 hours 5 minutes 51 seconds Transmit Statistics: -------------------Packets: 0 Bytes: 0 Interrupts: 0 Transmit Errors: 0 Packets Dropped: 0 Max Packets on S/W Transmit Queue: 0 S/W Transmit Queue Overflow: 0 Current S/W+H/W Transmit Queue Length: 0 Receive Statistics: ------------------Packets: 0 Bytes: 0 Interrupts: 0 Receive Errors: 0 Packets Dropped: 0 Bad Packets: 0

监视网络使用情况
Broadcast Packets: 0 Multicast Packets: 0 No Carrier Sense: 0 DMA Underrun: 0 Lost CTS Errors: 0 Max Collision Errors: 0 Late Collision Errors: 0 Deferred: 0 SQE Test: 0 Timeout Errors: 0 Single Collision Count: 0 Multiple Collision Count: 0 Current HW Transmit Queue Length: 0 General Statistics: ------------------No mbuf Errors: 0 Adapter Reset Count: 0 Driver Flags: Up Broadcast Running Simplex 64BitSupport PrivateSegment

- netstat -v
Broadcast Packets: 0 Multicast Packets: 0 CRC Errors: 0 DMA Overrun: 0 Alignment Errors: 0 No Resource Errors: 0 Receive Collision Errors: 0 Packet Too Short Errors: 0 Packet Too Long Errors: 0 Packets Discarded by Adapter: 0 Receiver Start Count: 0

监视网络使用情况

- netstat -v

IBM 10/100 Mbps Ethernet PCI Adapter Specific Statistics: -----------------------------------------------Chip Version: 25 RJ45 Port Link Status : down Media Speed Selected: 10 Mbps Half Duplex Media Speed Running: Unknown Receive Pool Buffer Size: 384 Free Receive Pool Buffers: 128 No Receive Pool Buffer Errors: 0 Inter Packet Gap: 96 Adapter Restarts due to IOCTL commands: 0 Packets with Transmit collisions: 1 collisions: 0 6 collisions: 0 11 collisions: 0 2 collisions: 0 7 collisions: 0 12 collisions: 0 3 collisions: 0 8 collisions: 0 13 collisions: 0 4 collisions: 0 9 collisions: 0 14 collisions: 0 5 collisions: 0 10 collisions: 0 15 collisions: 0 Excessive deferral errors: 0x0

监视网络使用情况

- netstat -p

显示由协议参量(udp、tcp、ip、icmp)所指定值的统计信息 #netstat -p
# netstat -p ip ip: 491351 total packets received 0 bad header checksums 0 with size smaller than minimum 0 with data size < data length 0 with header length < data size 0 with data length < header length 0 with bad options 0 with incorrect version number 25930 fragments received 0 fragments dropped (dup or out of space) 0 fragments dropped after timeout 12965 packets reassembled ok 475054 packets for this host 0 packets for unknown/unsupported protocol 0 packets forwarded 3332 packets not forwardable 0 redirects sent 405650 packets sent from this host 0 packets sent with fabricated ip header 0 output packets dropped due to no bufs, etc. 0 output packets discarded due to no route 5498 output datagrams fragmented 10996 fragments created 0 datagrams that can't be fragmented 0 IP Multicast packets dropped due to no receiver

监视网络使用情况

- netpmon

netpmon 命令使用跟踪工具可以得到在一个时间间隔内网络操作的详细内 容。
# netpmon -o netpmon.out -O all; sleep 400; trcstop
Valid -O options: cpu,dd,nfs,so,all cpu monitor CPU utilization dd: monitor Network DD traffic nfs: monitor NFS calls so: monitor socket calls all: short for “cpu,dd,nfs,so” (default)

#more netpmon.out

topas
基于文本的监视工具
Topas Monitor for host: Thu Jul 20 15:17:09 2000 Kernel User Wait Idle Interf tr0 lo0 10.2 2.4 0.0 87.3 asterix Interval: 2 | | | | |### |# | |######################### EVENTS/QUEUES Cswitch 52 Syscall 98 Reads 20 Writes 0 Forks 0 Execs 0 Runqueue 1.0 Waitqueue 1.0 FILE/TTY Readch Writech Rawin Ttyout Igets Namei Dirblk 1086 63 0 63 0 7 0

KBPS I-Pack O-Pack 0.3 6.0 0.5 0.0 0.0 0.0 KBPS 0.0 0.0 0.0 0.0 0.0 1.5% 0.0% 0.0% 0.0% 0.0% TPS 0.0 0.0 0.0 0.0 0.0 PgSp: PgSp: PgSp: PgSp: PgSp:

Disk Busy% hdisk0 0.0 hdisk5 0.0 hdisk4 0.0 hdisk3 0.0 hdisk1 0.0 topas (28220) i4llmd (14966) netscape_(26206) syslogd (7564) syncd (4244)

KB-In KB-Out 0.3 0.0 0.0 0.0 PAGING Faults KB-Read KB-Writ Steals 0.0 0.0 PgspIn 0.0 0.0 PgspOut 0.0 0.0 PageIn 0.0 0.0 PageOut 0.0 0.0 Sios root root atul root root

0 0 0 0 0 0 0

MEMORY Real,MB 2047 % Comp 0.0 % Noncomp 54.0 % Client 0.0 PAGING SPACE Size,MB 352 % Used 0.0 % Free 113.5

0.5mb 0.9mb 6.6mb 0.5mb 0.4mb

Press "h" for help screen. Press "q" to quit program.

nmon
nmon v4.40 [H for help] Hostname=asterix Refresh=2.0secs 10:05.04 RS/6000 Details Machine Type=PowerPC 604 which is a 32 bit machine with 8 CPUs. CPU Cache is Combined Instruction (16384 bytes) and Data (16384 bytes) Level 2 Cache size=1048576 AIX Version 4.3.2.0 uname=asterix hostname=asterix.aixncc.uk.ibm.com CPU Utilisation +-------------------------------------------------+ CPU User% Sys% Wait% Idle|0 |25 |50 |75 100| 0 13.4 25.7 47.0 13.9|UUUUUUssssssssssssWWWWWWWWWWWWWWWWWWWWWWW> | 1 2.5 18.8 66.8 11.9|UsssssssssWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW> | 0.5 72.8 26.2 |WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW> | 3.0 71.1 25.9 |sWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW> | 26.9 24.4 8.0 |UUUUUUUUUUUUUUUUUUUUsssssssssssssWWWWWWWWWWWW> | 0.0 73.3 26.7 |WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW> | 1.5 71.8 26.2 |WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW> | 0.0 73.3 26.7 |WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW> | +-------------------------------------------------+ 7.2 9.5 62.6 20.7|UUUssssWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW> | +-------------------------------------------------+ Memory Use Physical Virtual Paging pages/sec In Out % Used 6.5% 0.3% to Paging Space 93.2 0.5 % Free 93.5% 99.7% to File System 0.0 0.0 MB Used 132.5MB 1.7MB Paging Total 93.2 0.5 MB Free 1914.9MB 510.3MB Total(MB) 2047.4MB 512.0MB [0] Paging Faults 1168.0/sec Network I/O I/F Name Recv Trans kB/s packin packout insize outsize lo0 0.0 0.0 0.0 0.0 0.0 0.0 tr0 0.3 0.6 5.0 1.5 69.4 385.7 2 3 4 5 6 7 0.5 0.0 40.8 0.0 0.5 0.0

nmon
Adapter I/O read write xfers Adapter Type 00-07 372.7 2.0 kB/s 93.2 Wide SCSI I/O Controller Adapter 00-05 0.0 0.0 kB/s 0.0 SSA RAID Adapter Disk I/O Busy Read Write |0 |25 |50 |75 hdisk0 73% 372.7 2.0 kB|WRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR>R hdisk1 0% 0.0 0.0 kB|> hdisk2 0% 0.0 0.0 kB|> hdisk3 0% 0.0 0.0 kB|> hdisk4 0% 0.0 0.0 kB|> cd0 0% 0.0 0.0 kB|> Top Processes Processes=93 mode=3 (1=Basic, 2=CPU 3=Perf. w=wait-procs) PID %CPU Size Res Res Res Char RAM Paging Command Used K Set Text Data I/O Use io other repage 34544 38.1 196 240 32 208 23006 0% 104 0 0 find 23740 1.0 828 924 60 864 766 0% 0 0 0 nmon 2838 0.0 16 16 0 16 0 0% 0 0 0 netm 3096 0.0 64 64 0 64 0 0% 0 0 0 gil = TCP/IP 3958 0.0 16 16 0 16 0 0% 0 0 0 lvmbb 4226 0.0 148 168 4 164 0 0% 0 0 0 syncd 4398 0.0 36 64 4 60 0 0% 0 0 0 ssa_daemon 4792 0.0 616 448 40 408 0 0% 0 0 0 srcmstr 4942 0.0 536 604 84 520 0 0% 0 0 0 errdemon 100| | | | | | |

一般性能技巧
除非您是高手,否则最好不要修改AIX参数 不断的升级可以保证诊断最快 不要改变
软件、软件选项、硬件、数据库参数、硬盘或数据位置 使用PerfPMR

避免在正常工作系统上使用还未经试验的新功能

总结
与标准UNIX有很多共同点 AIX具有更多的工具,能够进行更加详细 的分析 AIX的内存使用是动态的 经过仔细的升级和改变可以避免出现性能 问题


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