Advanced queue taking a lot of CPU time
hi ,
My application has a workflow which dequeues messages from an advanced queue.The message is simple text message. But i am facing CPU time problems. when the workflow( one of the steps is to dequeue) runs it uses 100% of a particular CPU.
can somebody throw some light on the things to implement to reduce CPU time and why i am having this problem.
also , i am using the TOP command on UNIX to trace the process.Does it give us the correct CPU usage measure?suggest some more specific measures , if any.
Thanks in Advance
Hi,
I came across tip for speeding up OpenLdap a while ago, I have never tested it as I have never found the need to but here it is :-
Stop the OpenLdap service
Open slapd.conf which is under SharedServices\openLDAP\
Locate
*# Indices to maintain*
index objectClass eq
index cn,ou,cssIdentity,member,cssRoleDN,cssProductCode,cssVersion eq
index cssDisplayNameDefault eq,sub
and add
index uniqueMember eq
Save/Close
run slapindex.exe -f c:\<location to slapd.conf>\slapd.conf
Start up OpenLdap service again.
Though this doesn't explain the reason why you are suddenly getting performance issues, do you have a large amount of native users/groups ?
If you are on 9.3.1 have you tried Sync Native Directory from Shared Services.
Cheers
John
http://john-goodwin.blogspot.com/
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SLAPD.EXE taking a lot of CPU Time
Hi all,
I'm getting this stange issue on our Dev Boxes, when trying to launch a business rule, a process called slapd.exe (Open Ldap) takes up to 50 / 60 % of CPU time and it takes about 1 to 2 min for the prompts on the business rules to appear.
The system just seems to hang ...
Please let me know if you know how to resolve this,
Cheers,
JeremieHi,
I came across tip for speeding up OpenLdap a while ago, I have never tested it as I have never found the need to but here it is :-
Stop the OpenLdap service
Open slapd.conf which is under SharedServices\openLDAP\
Locate
*# Indices to maintain*
index objectClass eq
index cn,ou,cssIdentity,member,cssRoleDN,cssProductCode,cssVersion eq
index cssDisplayNameDefault eq,sub
and add
index uniqueMember eq
Save/Close
run slapindex.exe -f c:\<location to slapd.conf>\slapd.conf
Start up OpenLdap service again.
Though this doesn't explain the reason why you are suddenly getting performance issues, do you have a large amount of native users/groups ?
If you are on 9.3.1 have you tried Sync Native Directory from Shared Services.
Cheers
John
http://john-goodwin.blogspot.com/ -
Thread.sleep takes a lot of CPU time!
Hi,
I have the run method like this:
public void run()
while(true)
//some set of operations
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The above code's performance was measured under stress test. . The sleep operation seems to take a lot of CPU time
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Any ideas on why such a weird thing's happening?
In fact, in one more similar method also, sleep is taking similar CPU
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Playing embeded videos in Firefox take a lot of CPU time. Actually my old computer is not able to play these videos correctly if they are in HD. The problem appears with flash videos (not so surprising, flash sucks...) but also with html5 videos (there is an option in youtube to turn that on). However if I succeed to have the direct URL, these videos play perfecrtlky fine in mplayer using not more than 10-20% of CPU time. Is there a solution to that? Is there any possibility to use an external player to play HTML5 videos in firefox? If anybody knows, Why this problem, are the mozilla folk aware of this problem? (Note that I posted a thread a long time ago for this problem but concerning flash only)
Last edited by olive (2012-04-27 20:33:59)There's not much you can do to make HTML5 videos as fast as Xv, see http://swfdec.freedesktop.org/wiki/FAQ. They are slow for the same basic reason as Flash... the video overlay cannot be used because the standard allows for controls and CSS to be rendered on top of the video.
As for redirecting to an external player... this is not as easy as it could be. If the videos appeared in <embed> tags or <object> tags, one could use Mozplugger, Media Player Connectivity and other programs, but I don't think one has been written to handle the <video> tag. An upcoming update to firefox will make it use gstreamer, however. If this still results in slow playback, it will at least make it easier to use an external player. I imagine you would have to patch firefox to make it use a port on the localhost as the video sink instead of the screen. Then you would run gst-launch to receive that RTP stream. -
Syslogd daemon take lot of cpu time arounf 50% of cpu utilization.
syslogd daemon problem it take lot of cpu time arounf 50% of cpu utilization. How do i solve this issue without reboot.
You can try then a "/etc/init.d/syslog stop" and "/etc/init.d/syslog start"
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Grouch_fr
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Hi everyone!
Does anyone know where DCexport.exe comes from? I believe its used by dynamic converter is this right?
we use dynamic converter to get the html conversion from word documents to present the results on our intranet solution.
have anyone experienced problems whit DCexport taking up a lot of cpu power?Hi,
I came across tip for speeding up OpenLdap a while ago, I have never tested it as I have never found the need to but here it is :-
Stop the OpenLdap service
Open slapd.conf which is under SharedServices\openLDAP\
Locate
*# Indices to maintain*
index objectClass eq
index cn,ou,cssIdentity,member,cssRoleDN,cssProductCode,cssVersion eq
index cssDisplayNameDefault eq,sub
and add
index uniqueMember eq
Save/Close
run slapindex.exe -f c:\<location to slapd.conf>\slapd.conf
Start up OpenLdap service again.
Though this doesn't explain the reason why you are suddenly getting performance issues, do you have a large amount of native users/groups ?
If you are on 9.3.1 have you tried Sync Native Directory from Shared Services.
Cheers
John
http://john-goodwin.blogspot.com/ -
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When iTunes is just sitting there with my Music Library displayed, Activity Monitor shows it's using a pretty consistent 22-25% of CPU time. I look at Activity Monitor once in a while and I've never noticed this before. I don't know if it started when I upgraded to iTunes 7.4.2 or not. Other Macs I have access to use close to 0%. I have repaired permissions, checked the hard drive, and waved the other dead chickens over it without any change. Obviously this soaks up a lot of machine resources. Any clues or ideas would be welcome.
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X takes away a lot of cpu time!
Today I installed Arch on my Fujitsu Siemens Amilo Pa2510 and i noticed that the cpu fan is allways on.
The reason seems to be the X-Server which takes away almost 50%.
Its a Athlon 64 X2 System with an Ati Mobile X1200
This is my Xorg.conf:
# Auto-generated by Archie mkxcfg
# Auto-generated by Archie mkxcfg
Section "ServerLayout"
# Serial Mouse not detected
# USB Mouse not detected
Identifier "Xorg Configured"
Screen 0 "aticonfig-Screen[0]" 0 0
InputDevice "Keyboard0" "CoreKeyboard"
InputDevice "PS/2 Mouse" "CorePointer"
Option "AIGLX" "on"
EndSection
Section "Files"
# Additional fonts: Locale, Gimp, TTF...
# FontPath "/usr/share/lib/X11/fonts/latin2/75dpi"
# FontPath "/usr/share/lib/X11/fonts/latin2/100dpi"
# True type and type1 fonts are also handled via xftlib, see /etc/X11/XftConfig!
RgbPath "/usr/share/X11/rgb"
ModulePath "/usr/lib/xorg/modules"
FontPath "/usr/share/fonts/misc:unscaled"
FontPath "/usr/share/fonts/misc"
FontPath "/usr/share/fonts/75dpi:unscaled"
FontPath "/usr/share/fonts/75dpi"
FontPath "/usr/share/fonts/100dpi:unscaled"
FontPath "/usr/share/fonts/100dpi"
FontPath "/usr/share/fonts/PEX"
FontPath "/usr/share/fonts/cyrillic"
FontPath "/usr/share/fonts/Type1"
FontPath "/usr/share/fonts/ttf/western"
FontPath "/usr/share/fonts/ttf/decoratives"
FontPath "/usr/share/fonts/truetype"
FontPath "/usr/share/fonts/truetype/openoffice"
FontPath "/usr/share/fonts/truetype/ttf-bitstream-vera"
FontPath "/usr/share/fonts/latex-ttf-fonts"
FontPath "/usr/share/fonts/defoma/CID"
FontPath "/usr/share/fonts/defoma/TrueType"
EndSection
Section "Module"
Load "ddc" # ddc probing of monitor
Load "dbe"
Load "dri"
Load "extmod"
Load "glx"
Load "bitmap" # bitmap-fonts
Load "type1"
Load "freetype"
Load "record"
# Load "synaptics"
EndSection
Section "ServerFlags"
Option "AllowMouseOpenFail" "true"
EndSection
Section "InputDevice"
Identifier "Keyboard0"
Driver "keyboard"
Option "CoreKeyboard"
Option "XkbRules" "xorg"
Option "XkbModel" "pc105"
Option "XkbLayout" "de"
Option "XkbVariant" ""
EndSection
Section "InputDevice"
Identifier "Serial Mouse"
Driver "mouse"
Option "Protocol" "Microsoft"
Option "Device" "/dev/ttyS0"
Option "Emulate3Buttons" "true"
Option "Emulate3Timeout" "70"
Option "SendCoreEvents" "true"
EndSection
Section "InputDevice"
Identifier "PS/2 Mouse"
Driver "mouse"
Option "Protocol" "auto"
Option "ZAxisMapping" "4 5"
Option "Device" "/dev/psaux"
Option "Emulate3Buttons" "true"
Option "Emulate3Timeout" "70"
Option "SendCoreEvents" "true"
EndSection
Section "InputDevice"
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Driver "mouse"
Option "Device" "/dev/input/mice"
Option "SendCoreEvents" "true"
Option "Protocol" "IMPS/2"
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Option "Buttons" "5"
EndSection
Section "Monitor"
Identifier "aticonfig-Monitor[0]"
Option "VendorName" "ATI Proprietary Driver"
Option "ModelName" "Generic Autodetecting Monitor"
Option "DPMS" "true"
EndSection
Section "Device"
Identifier "aticonfig-Device[0]"
Driver "fglrx"
EndSection
Section "Screen"
Identifier "aticonfig-Screen[0]"
Device "aticonfig-Device[0]"
Monitor "aticonfig-Monitor[0]"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
EndSubSection
EndSection
Section "DRI"
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EndSection
Section "Extensions"
Option "Composite" "Disable"
EndSection
and here the rc.conf
# /etc/rc.conf - Main Configuration for Arch Linux
# LOCALIZATION
# LOCALE: available languages can be listed with the 'locale -a' command
# HARDWARECLOCK: set to "UTC" or "localtime"
# TIMEZONE: timezones are found in /usr/share/zoneinfo
# KEYMAP: keymaps are found in /usr/share/kbd/keymaps
# CONSOLEFONT: found in /usr/share/kbd/consolefonts (only needed for non-US)
# CONSOLEMAP: found in /usr/share/kbd/consoletrans
# USECOLOR: use ANSI color sequences in startup messages
LOCALE="de_DE.utf8"
HARDWARECLOCK="localtime"
TIMEZONE="Berlin/Europe"
KEYMAP="de"
CONSOLEFONT=
CONSOLEMAP=
USECOLOR="yes"
# HARDWARE
# Scan hardware and load required modules at bootup
MOD_AUTOLOAD="yes"
# Module Blacklist - modules in this list will never be loaded by udev
MOD_BLACKLIST=(agpgart)
# Modules to load at boot-up (in this order)
# - prefix a module with a ! to blacklist it
MODULES=(powernow-k8 cpufreq_pwersave cpufreq_userspace cpufreq_conservative cpufreq_ondemand freq_table ndiswrapper !ath_hal !ath_pci r8169 fglrx wlan snd-mixer-oss snd-pcm-oss snd-hwdep snd-page-alloc snd-pcm snd-timer snd snd-hda-intel soundcore)
# Scan for LVM volume groups at startup, required if you use LVM
USELVM="no"
# NETWORKING
HOSTNAME="amilo"
# Use 'ifconfig -a' or 'ls /sys/class/net/' to see all available
# interfaces.
# Interfaces to start at boot-up (in this order)
# Declare each interface then list in INTERFACES
# - prefix an entry in INTERFACES with a ! to disable it
# - no hyphens in your interface names - Bash doesn't like it
# Note: to use DHCP, set your interface to be "dhcp" (eth0="dhcp")
lo="lo 127.0.0.1"
eth0="dhcp"
wlan0="dhcp"
INTERFACES=(lo eth0 !ath0)
# Routes to start at boot-up (in this order)
# Declare each route then list in ROUTES
# - prefix an entry in ROUTES with a ! to disable it
gateway="default gw 192.168.0.1"
ROUTES=(!gateway)
# Enable these network profiles at boot-up. These are only useful
# if you happen to need multiple network configurations (ie, laptop users)
# - set to 'menu' to present a menu during boot-up (dialog package required)
# - prefix an entry with a ! to disable it
# Network profiles are found in /etc/network-profiles
NETWORKS=(Kreulstrasse Rottmannshof)
# DAEMONS
# Daemons to start at boot-up (in this order)
# - prefix a daemon with a ! to disable it
# - prefix a daemon with a @ to start it up in the background
DAEMONS=(syslog-ng hal @kdm network net-profiles @cpufreq netfs crond)
# End of file
Thank you for every sugestion.
FabianTry disabling AIGLX. It is something new so it is more probable that if this is a bug, it comes with it.
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Sockd process uses a lot of CPU time
Hi,
I'm running the Sun Java System Web Proxy Server version 4.02 on a SunFire V210 dual processor box running Solaris 10 with the default socks5.conf for testing.
Just browsing a few web pages in Firefox or IE using the socks proxy boosts CPU usage from the sockd process to a staggering 50% and stay there for several minutes.
Comparing with the old NEC reference Socks5 daemon the Sun version is really performing badly.
The system is pretty standard though I have tuned /etc/system and the tcp stack using recommendations in the proxy administration manual. All Solaris 10 patches are installed.
prstat output:
PID USERNAME SIZE RSS STATE PRI NICE TIME CPU PROCESS/NLWP
24519 proxy 6664K 4384K cpu1 0 10 0:11:18 50% sockd/43Any ideas what's wrong or do I have to stick with the old NEC reference daemon?
Regards
Kasper L�vschallUsing:
truss -dlfo truss.out ./sockd-wdog
Where things begin to happen:
5259/1: 11.2858 lwp_park(0xFFBFF290, 0) Err#62 ETIME
5259/1: 12.2958 lwp_park(0xFFBFF290, 0) Err#62 ETIME
5259/1: 13.3058 lwp_park(0xFFBFF290, 0) Err#62 ETIME
5259/1: 14.3158 lwp_park(0xFFBFF290, 0) Err#62 ETIME
5259/2: 15.1858 pollsys(0xFEAEFDC8, 1, 0xFEAEFD58, 0x00000000) = 0
5259/1: 15.3258 lwp_park(0xFFBFF290, 0) Err#62 ETIME
5259/2: pollsys(0xFEAEFDC8, 1, 0xFEAEFD58, 0x00000000) (sleeping...)
5259/1: lwp_park(0xFFBFF290, 0) (sleeping...)
5259/1: 16.3359 lwp_park(0xFFBFF290, 0) Err#62 ETIME
5259/1: lwp_park(0xFFBFF290, 0) (sleeping...)
5259/1: 17.3459 lwp_park(0xFFBFF290, 0) Err#62 ETIME
5259/2: 18.2382 pollsys(0xFEAEFDC8, 1, 0xFEAEFD58, 0x00000000) = 1
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5259/2: 18.2386 lwp_unpark(43) = 0
5259/43: 18.2386 lwp_park(0x00000000, 0) = 0
5259/2: 18.2388 accept(3, 0xFEAEFEC8, 0xFEAEFE64, SOV_DEFAULT) Err#11 EAGAIN
5259/43: 18.2389 getsockname(5, 0xFE5AFEA8, 0xFE5AFDA4, SOV_DEFAULT) = 0
5259/43: 18.2391 getpeername(5, 0xFE5AFE38, 0xFE5AFDA4, SOV_DEFAULT) = 0
5259/43: 18.2391 read(5, 0x00063B7E, 1) Err#11 EAGAIN
5259/43: 18.2407 pollsys(0xFE5AFD08, 1, 0xFE5AFCA0, 0x00000000) = 1
5259/43: 18.2408 read(5, "04", 1) = 1
5259/43: 18.2409 read(5, "01\0 P BF9 ] c", 7) = 7
5259/43: 18.2411 read(5, " k l\0", 255) = 3
5259/43: 18.2412 write(4, " [ 0 1 / M a r / 2 0 0 6".., 88) = 88
5259/43: 18.2413 so_socket(PF_INET, SOCK_STREAM, IPPROTO_IP, "", SOV_DEFAULT) = 6
5259/43: 18.2414 fcntl(6, F_GETFL) = 2
5259/43: 18.2415 fcntl(6, F_SETFL, FWRITE|FNONBLOCK) = 0
5259/43: 18.2416 bind(6, 0xFE5AF980, 16, SOV_SOCKBSD) = 0
5259/43: 18.2418 connect(6, 0xFE5AF910, 16, SOV_DEFAULT) Err#150 EINPROGRESS
5259/43: 18.2970 pollsys(0xFE5AF798, 1, 0xFE5AF730, 0x00000000) = 1
5259/43: 18.2971 getsockopt(6, SOL_SOCKET, SO_ERROR, 0xFE5AF6D0, 0xFE5AF6D4, SOV_DEFAULT) = 0
5259/43: 18.2972 getsockname(6, 0xFE5AF980, 0xFE5AF8A4, SOV_DEFAULT) = 0
5259/43: 18.2973 write(5, "\0 Z918782E1 511", 8) = 8
5259/43: 18.2974 lwp_unpark(3) = 0
5259/3: 18.2974 lwp_park(0x00000000, 0) = 0
5259/3: 18.2977 brk(0x00064850) = 0
5259/3: 18.2977 brk(0x00078850) = 0
5259/3: 18.2981 pollsys(0xFEACF458, 50, 0xFEACF3E8, 0x00000000) = 0
5259/3: 18.2982 pollsys(0xFEACF458, 50, 0xFEACF3E8, 0x00000000) = 0
5259/3: 18.2983 pollsys(0xFEACF458, 50, 0xFEACF3E8, 0x00000000) = 0Then loades of pollsys(0xFEACF458, 50, 0xFEACF3E8, 0x00000000) = 0 until I kill the daemon - seems like they are killing the server?
Thanks,
Kasper -
Ns-slapd process taking too much cpu time
Dear All,
I am currently using directory server 6.2 and it comes out that the ns-slapd process is taking almost 95% of cpu time. This goes for 2 to 3 hours then it comes back to normal. This is happening every alternate day. I have monitored the log but could not find any suspected activity which may be causing this.
Is this something vulnerable in 6.2?
Any tunings that i should undergo?
Regards,
ScottyDear Ludovic,
i am finding alot of the below unindexed searches:
[30/Oct/2007:16:30:27 +0400] - WARNING<20805> - Backend Database - conn=-1 op=0 msgId=-1 - search is not indexed base='cn=changelog' filter='(&(nsroledn=un=xxcccvvvcb823f7,ou=gdf016926,ou=people,ou=2005,ou=r444,ou=mail,o=kas.ac,o=pblebs,o=pab)(|(objectclass=*)(objectclass=ldapsubentry)))' scope='sub'
and prstat is showing
PID USERNAME SIZE RSS STATE PRI NICE TIME CPU PROCESS/LWPID
13433 root 4357M 2727M run 32 0 1:44:10 3.6% ns-slapd/101
13433 root 4357M 2727M run 32 0 2:40:40 3.6% ns-slapd/84
13433 root 4357M 2727M run 33 0 0:55:00 3.5% ns-slapd/97
13433 root 4357M 2727M run 33 0 1:35:56 3.4% ns-slapd/57
13433 root 4357M 2727M run 33 0 0:24:45 3.4% ns-slapd/94
13433 root 4357M 2727M run 43 0 2:06:04 3.1% ns-slapd/86
and even more
Would it be of the unindexed searches?
Thanks,
Scorry
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