AR 9.4.2 CPU usage on older systems (SUSE Linux 10.0)

Hi,
in the last few weeks, I spent a lot of time debugging AR eating 100% CPU on a very old system (it is based on SL 10.0 and can't be upgraded easily).
The steps to reproduce the problem:
- install SUSE Linux 10.0 (VERY old...). It is OK with all newer SUSE distros though.
- install AdbeRdr9.4.2-1_i486linux_enu.tar.bz2
Run it.
CPU goes immediatelly to 100%, with empty Reader, no document.
Reader is heavily communicating with X server, which can be seen with xmon tool (ftp://ftp.x.org/contrib/devel_tools/xmon.1.5.4.tar.gz).
I can workaround the problem by:
- get libs (/opt/gnome/lib, /lib and /usr/ib) from a bit newer distro (10.1 in my case)
- add them to LD_LIBRARY_PATH, therefore calling the Reader by:
/ROOT-10.1/lib/ld-linux.so.2 ./acroread
in the intellinux directory.
This workaround is not proper workaround because the Reader itself can't print afterwards and other similar external tasks.
But the workaround is enough to show that Adobe Reader is very CPU intensive on SUSE 10.0.
Can you fix it?
xmon debug output contains MANY:
                                 ..............EVENT: SelectionNotify
                                     sequence number: 1f05
                                                time: TIM 4bc41a56
                                           requestor: WIN 00400414
                                           selection: ATM 000000c9
                                              target: ATM 000000cc
                                            property: <NONE>
                                               Event (fd 8): 1f 00 07 1f 56 1a
c4 4b 14 04 40 00 c9 00 00 00 1f 00 00 00 00 00 00 00 18 00 00 00 14 00 00 00
                                 ..............EVENT: SelectionNotify
                                     sequence number: 1f07
                                                time: TIM 4bc41a56
                                           requestor: WIN 00400414
                                           selection: ATM 000000c9
                                              target: <STRING>
                                            property: <NONE>
                                               Event (fd 8): 1c 79 08 1f 14 04
40 00 ca 00 00 00 0b 1b c4 4b 00 a7 06 08 b8 79 4b 02 14 04 40 00 01 00 00 c0
                                 ..............EVENT: PropertyNotify
                                     sequence number: 1f08
                                              window: WIN 00400414
                                                atom: ATM 000000ca
                                                time: TIM 4bc41b0b
                                               state: NewValue
                                               Event (fd 8): 1f 00 0a 1f 0b 1b
c4 4b 14 04 40 00 c9 00 00 00 af 00 00 00 00 00 00 00 18 00 00 00 14 00 00 00
                                 ..............EVENT: SelectionNotify
                                     sequence number: 1f0a
                                                time: TIM 4bc41b0b
                                           requestor: WIN 00400414
                                           selection: ATM 000000c9
                                              target: ATM 000000af
                                            property: <NONE>
                                               Event (fd 8): 1f 00 0c 1f 0b 1b
and
         ............REQUEST: ConvertSelection
             sequence number: 1e11
              request length: 0006
                   requestor: WIN 00400414
                   selection: ATM 000000c9
                      target: ATM 000000af
                    property: ATM 000000cb
                        time: TIM 4bc5b4ad
                     Request (fd 5): 17 00 02 00 c9 00 00 00
         ............REQUEST: GetSelectionOwner
             sequence number: 1e12
              request length: 0002
                   selection: ATM 000000c9
                     Request (fd 5): 18 00 06 00 14 04 40 00 c9 00 00 00 cc 00
00 00 cb 00 00 00 ad b4 c5 4b
         ............REQUEST: ConvertSelection
             sequence number: 1e13
              request length: 0006
                   requestor: WIN 00400414
                   selection: ATM 000000c9
                      target: ATM 000000cc
                    property: ATM 000000cb
                        time: TIM 4bc5b4ad
                     Request (fd 5): 17 00 02 00 c9 00 00 00
         ............REQUEST: GetSelectionOwner
             sequence number: 1e14
              request length: 0002
                   selection: ATM 000000c9
                     Request (fd 5): 18 00 06 00 14 04 40 00 c9 00 00 00 1f 00
00 00 cb 00 00 00 ad b4 c5 4b
         ............REQUEST: ConvertSelection
             sequence number: 1e15
              request length: 0006
                   requestor: WIN 00400414
                   selection: ATM 000000c9
                      target: <STRING>
                    property: ATM 000000cb
                        time: TIM 4bc5b4ad
endlessly repeated... This doesn't happen on newer systems.
Thanks for helping us!

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PCManFM 5% CPU Average
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python 1% cpu
midori up to 38% cpu
iron up to 25% cpu (odd...)
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Xorg (when moving windows around) up to 80% cpu
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# nvidia-xconfig: X configuration file generated by nvidia-xconfig
# nvidia-xconfig: version 1.0 (buildmeister@builder63) Thu Jun 25 18:57:07 PDT 2009
Section "ServerLayout"
Identifier "Layout0"
Screen 0 "Screen0" 0 0
InputDevice "Keyboard0" "CoreKeyboard"
InputDevice "Mouse0" "CorePointer"
EndSection
Section "Files"
EndSection
Section "InputDevice"
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Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/psaux"
Option "Emulate3Buttons" "no"
Option "ZAxisMapping" "4 5"
EndSection
Section "InputDevice"
# generated from default
Identifier "Keyboard0"
Driver "kbd"
EndSection
Section "Monitor"
Identifier "Monitor0"
VendorName "Unknown"
ModelName "Unknown"
HorizSync 30.0 - 110.0
VertRefresh 50.0 - 150.0
Option "DPMS"
EndSection
Section "Device"
Identifier "Device0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
DefaultDepth 24
SubSection "Display"
Depth 24
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EndSubSection
EndSection
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Computer
Summary
Computer
Processor Intel(R) Pentium(R) 4 CPU 1.60GHz
Memory 1034MB (239MB used)
Operating System Arch Linux
User Name mythus (Travis K. Randall)
Date/Time Thu 08 Oct 2009 05:24:52 PM CDT
Display
Resolution 1600x900 pixels
OpenGL Renderer GeForce2 MX/AGP/SSE2
X11 Vendor The X.Org Foundation
Multimedia
Audio Adapter ICH - Intel 82801BA-ICH2
Input Devices
Macintosh mouse button emulation
AT Translated Set 2 keyboard
Power Button
Power Button
PC Speaker
Logitech USB Optical Mouse
Printers
No printers found
SCSI Disks
ATA ST3160212A
ATA IC35L090AVV207-0
LITE-ON LTR-16102B
TSSTcorp CD/DVDW TS-H552D
Operating System
Version
Kernel Linux 2.6.30-ARCH (i686)
Compiled #1 SMP PREEMPT Wed Sep 9 12:37:32 UTC 2009
C Library GNU C Library version 2.10.1 (stable)
Default C Compiler GNU C Compiler version 4.4.1 (GCC)
Distribution Arch Linux
Current Session
Computer Name norova
User Name mythus (Travis K. Randall)
Home Directory /home/mythus
Desktop Environment Unknown (Window Manager: Fluxbox)
Misc
Uptime 11 hours, 38 minutes
Load Average 0.20, 0.38, 0.34
Kernel Modules
Loaded Modules
ipv6 IPv6 protocol stack for Linux
reiserfs ReiserFS journaled filesystem
usbhid USB HID core driver
hid
arc4 ARC4 Cipher Algorithm
ecb ECB block cipher algorithm
snd_seq_dummy ALSA sequencer MIDI-through client
rt2500pci Ralink RT2500 PCI & PCMCIA Wireless LAN driver.
snd_seq_oss OSS-compatible sequencer module
rt2x00pci rt2x00 pci library
snd_seq_midi_event MIDI byte <-> sequencer event coder
rt2x00lib rt2x00 library
snd_seq Advanced Linux Sound Architecture sequencer.
led_class LED Class Interface
snd_seq_device ALSA sequencer device management
input_polldev Generic implementation of a polled input device
mac80211 IEEE 802.11 subsystem
snd_intel8x0 Intel 82801AA,82901AB,i810,i820,i830,i840,i845,MX440; SiS 7012; Ali 5455
uhci_hcd USB Universal Host Controller Interface driver
snd_pcm_oss PCM OSS emulation for ALSA.
fan ACPI Fan Driver
cfg80211 wireless configuration support
ppdev
ehci_hcd USB 2.0 'Enhanced' Host Controller (EHCI) Driver
snd_mixer_oss Mixer OSS emulation for ALSA.
snd_ac97_codec Universal interface for Audio Codec '97
nvidia
lp
eeprom_93cx6 EEPROM 93cx6 chip driver
parport_pc PC-style parallel port driver
ohci1394 Driver for PCI OHCI IEEE-1394 controllers
parport
psmouse PS/2 mouse driver
ac97_bus
ieee1394
serio_raw Raw serio driver
8139too RealTek RTL-8139 Fast Ethernet driver
e100 Intel(R) PRO/100 Network Driver
snd_pcm Midlevel PCM code for ALSA.
pcspkr PC Speaker beeper driver
battery ACPI Battery Driver
8139cp RealTek RTL-8139C+ series 10/100 PCI Ethernet driver
snd_timer ALSA timer interface
i2c_core I2C-Bus main module
iTCO_wdt Intel TCO WatchDog Timer Driver
mii MII hardware support library
evdev Input driver event char devices
snd Advanced Linux Sound Architecture driver for soundcards.
ac ACPI AC Adapter Driver
iTCO_vendor_support Intel TCO Vendor Specific WatchDog Timer Driver Support
usbcore
soundcore Core sound module
sg SCSI generic (sg) driver
shpchp Standard Hot Plug PCI Controller Driver
snd_page_alloc Memory allocator for ALSA system.
processor ACPI Processor Driver
thermal ACPI Thermal Zone Driver
pci_hotplug PCI Hot Plug PCI Core
intel_agp
button ACPI Button Driver
agpgart AGP GART driver
rtc_cmos Driver for PC-style 'CMOS' RTCs
rtc_core RTC class support
rtc_lib
ext4 Fourth Extended Filesystem
mbcache Meta block cache (for extended attributes)
jbd2
crc16 CRC16 calculations
sr_mod SCSI cdrom (sr) driver
cdrom
sd_mod SCSI disk (sd) driver
ata_piix SCSI low-level driver for Intel PIIX/ICH ATA controllers
ata_generic low-level driver for generic ATA
pata_acpi SCSI low-level driver for ATA in ACPI mode
libata Library module for ATA devices
floppy
scsi_mod SCSI core
Display
Display
Display
Resolution 1600x900 pixels
Vendor The X.Org Foundation
Version 1.6.3.901
Monitors
Monitor 0 1600x900 pixels
Extensions
BIG-REQUESTS
Composite
DAMAGE
DOUBLE-BUFFER
DPMS
DRI2
GLX
Generic Event Extension
MIT-SCREEN-SAVER
MIT-SHM
NV-CONTROL
NV-GLX
RANDR
RECORD
RENDER
SECURITY
SHAPE
SYNC
X-Resource
XC-MISC
XFIXES
XFree86-DGA
XFree86-VidModeExtension
XINERAMA
XInputExtension
XKEYBOARD
XTEST
XVideo
OpenGL
Vendor NVIDIA Corporation
Renderer GeForce2 MX/AGP/SSE2
Version 1.5.8 NVIDIA 96.43.13
Direct Rendering Yes
Processor
Processor
Processor
Name Intel(R) Pentium(R) 4 CPU 1.60GHz
Family, model, stepping 15, 1, 2 (Pentium 4)
Vendor Intel
Configuration
Cache Size 256kb
Frequency 1594.77MHz
BogoMIPS 3190.44
Byte Order Little Endian
Features
FDIV Bug no
HLT Bug no
F00F Bug no
Coma Bug no
Has FPU yes
Cache
Cache information not available
Capabilities
fpu Floating Point Unit
vme Virtual 86 Mode Extension
de Debug Extensions - I/O breakpoints
pse Page Size Extensions (4MB pages)
tsc Time Stamp Counter and RDTSC instruction
msr Model Specific Registers
pae Physical Address Extensions
mce Machine Check Architeture
cx8 CMPXCHG8 instruction
apic Advanced Programmable Interrupt Controller
sep Fast System Call (SYSENTER/SYSEXIT)
mtrr Memory Type Range Registers
pge Page Global Enable
mca Machine Check Architecture
cmov Conditional Move instruction
pat Page Attribute Table
pse36 36bit Page Size Extensions
clflush Cache Line Flush instruction
dts Debug Store
acpi Thermal Monitor and Software Controlled Clock
mmx MMX technology
fxsr FXSAVE and FXRSTOR instructions
sse SSE instructions
sse2 SSE2 (WNI) instructions
ss Self Snoop
ht HyperThreading
tm Thermal Monitor
up smp kernel running on up
pebs Precise-Event Based Sampling
bts Branch Trace Store
Memory
Memory
Total Memory 1034084 kB
Free Memory 94276 kB
Buffers 40536 kB
Cached 700112 kB
Cached Swap 0 kB
Active 170788 kB
Inactive 726844 kB
Active(anon) 74112 kB
Inactive(anon) 88348 kB
Active(file) 96676 kB
Inactive(file) 638496 kB
Unevictable 12 kB
Mlocked 12 kB
High Memory 139144 kB
Free High Memory 252 kB
Low Memory 894940 kB
Free Low Memory 94024 kB
Virtual Memory 2931852 kB
Free Virtual Memory 2931852 kB
Dirty 12 kB
Writeback 0 kB
AnonPages 156996 kB
Mapped 57392 kB
Slab 24260 kB
SReclaimable 18864 kB
SUnreclaim 5396 kB
PageTables 1376 kB
NFS_Unstable 0 kB
Bounce 0 kB
WritebackTmp 0 kB
CommitLimit 3448892 kB
Committed_AS 404212 kB
VmallocTotal 122880 kB
VmallocUsed 27648 kB
VmallocChunk 52368 kB
DirectMap4k 32760 kB
DirectMap4M 876544 kB
Benchmarks
CPU Blowfish
CPU Blowfish
This Machine 1595 MHz 50.176
Intel(R) Celeron(R) M processor 1.50GHz (null) 26.1876862
PowerPC 740/750 (280.00MHz) (null) 172.816713
CPU CryptoHash
CPU CryptoHash
This Machine 1595 MHz 11.071
CPU Fibonacci
CPU Fibonacci
This Machine 1595 MHz 74.202
Intel(R) Celeron(R) M processor 1.50GHz (null) 8.1375674
PowerPC 740/750 (280.00MHz) (null) 58.07682
CPU N-Queens
CPU N-Queens
This Machine 1595 MHz 132.704
FPU FFT
FPU FFT
This Machine 1595 MHz 104.630
FPU Raytracing
FPU Raytracing
This Machine 1595 MHz 212.639
Intel(R) Celeron(R) M processor 1.50GHz (null) 40.8816714
PowerPC 740/750 (280.00MHz) (null) 161.312647
So what I am wanting help with is finding the solution to the cpu usage so that I can use this computer at least until I can afford a new power supply or whatever. I am open to any good suggestions, though I must state I am not really interested in tiling wm's at the moment. I am just not a true minimalist.
Thanks in advance for any and all help. I understand that there is a lot of info in this post, but it is my hope that with this info the problem can be solved. If there is info I didn't provide that is needed, please let me know.

also check that you have
session.screen0.opaqueMove false
in your .fluxbox/init this will probably help a bit if it is currently true,
Last edited by Cyrusm (2009-01-26 13:52:13)

CPU Usage 100%? K8N Diamond Plus

Never before have I witnessed the CPU being used at it's absolute maximum. It has been occuring regularily with my system. I noticed it first when my screen saver started getting jittery. This seems to occur most often about 1-2 minutes after windows finishes loading. It seems kind of odd to me that this occurs during typically idle system times. The memory usage also dramatically rises during these spikes, using ctrl+alt+delete I noticed svchost.exe to be the culprit of the memory usage atleast. The hard drive doesn't appear to be active when these events occur. Is this normal for this motherboard, or is this something that should be corrected?
I've always had 3 short beeps upon startup with this board, but it has never stalled the boot process. Anyone know what this means?
I've upgraded my board somewhat recently and carried over the CPU and memory from a older MSI model that used the same type. Could it be possible either or both are incompatible?
Also one, somewhat less important problem. First off I must say that the PS/2 power on feature is pretty cool. I used it with a wireless keyboard so I could turn on my PC from my living room HDTV (I have my comp wired through Y/Pr/Pb cables). Only problem is about one in every 4 or so shutdowns the system restarts immediatly when this feature is selected in the bios. Bios issue maybe?
System Info (and everything directly connected to it):
(pretty sure not all of this is relevant, but I figure it couldn't hurt)
MoBo: MSI K8N Diamond Plus
Memory: 1Gb (2x512 kit) Crucial PC3200 CT6464Z40B.C8TD (in slots 1 & 2)
Processor: Athlon 64 3200+ Winchester
GPU (only one): MSI NX7900GT-VT2D256E-HD (primary PCI-e)
Modem: SupraMax LE 56K Fax Modem (PCI)
HDD: WD Caviar 120Gb IDE (primary)
HDD: Maxtor 80Gb USB (external, non system)
3.5: Standard 3.5" floppy drive (a:)
5.25: Lite-on 48x CD burner (secondary slave)
5.25: Sony DVD rom (secondary master)
PS: Antec SmartPower 2.0 500W
Human Interface: Wired Logitech KB & Mouse through USB (for primary use)
Human Interface: Wireless Logitech KB & Mouse through PS/2 (for remote use, often turned off)
Primary Monitor: Viewsonic P70f 17" CRT hooked to DVI #1 via RGB adapter
Secondary Monitor: Sony KDL-V32XBR1 32" HDTV through 1080i Y/Pr/Pb adapter, stereo audio
Speakers: harman/kardon
Connected to internet via Cat5 network, phone modem sometimes used when primary internet is down
OS: Windows XP Pro w/ SP 2 installed
Thank's in advance to anyone that can help me as I'm pretty much stumped at this point.

Quote from: mdawgmike on 11-November-06, 11:25:18
Any other suggestions?
how about this:
Quote from: BOSSKILLER on 03-November-06, 23:14:30
get Process Explorer to determinate in details what make this CPU usage: http://www.sysinternals.com/Utilities/ProcessExplorer.html
it has more detailed information than the built-in task manager.

High cpu usage for garbage collection (uptime vs total gc time)

Hi Team,
We have a very high cpu usage issue in the production.
When we restart the server, the cpu idle time would be around 95% and it comes down as days goes by. Today idle cpu is 30% and it is just 6th day after the server restart.
Environemnt details:
Jrockit version:
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_05-b04)
BEA WebLogic JRockit(TM) 1.4.2_05 JVM R24.4.0-1 (build ari-38120-20041118-1131-linux-ia32, Native Threads, GC strategy: parallel)
Gc Algorithm: JRockit Garbage Collection System currently running strategy: Single generational, parallel mark, parallel sweep
Number Of Processors: 4
Max Heap Size: 1073741824
Total Garbage Collection Time: 21:43:56.5
Uptime: 114:33:4.1
Total Garbage Collection Count: 420872
Total Number Of Threads: 198
Number Of Daemon Threads: 191
Can you guys please tell me what would be problem in the server which causing the high cpu usage?
One more thing I would like to know is that why the total number of threads is 198 when we specified the Executor pool size as 25? I agree that weblogic would create some threads for its maintenance but around 160 threads!!! something is wrong I guess.
Santhosh.
[email protected]

Hi,
I'm having a similar problem, but haven't been able to resolve it yet. Troubleshooting is made even harder by the fact that this is only happening on our production server, and I've been unable to reproduce it in the lab.
I'll post whatever findings I have and hopefully we'll be able to find a solution with the help of BEA engineers.
In my case, I have a stand-alone Tomcat server that runs fine for about 1-2 days, and then the JVM suddenly starts using more CPU, and as a result, the server load shoots up (normal CPU utilization is ~5% but eventually goes up to ~95%; load goes from 0.1 to 4+).
What I have found so far is that this corresponds to increased GC activity.
Let me list my environment specs before I proceed, though:
CPU: Dual Xeon 3.06GHz
RAM: 2GB
OS: RHEL4.4 (2.6.9-42.0.2.ELsmp)
JVM build 1.5.0_03-b07 (BEA JRockit(R) (build dra-45238-20050523-2008-linux-ia32, R25.2.0-28))
Tomcat version 5.5.12
JAVA_OPTS="-Xms768m -Xmx768m -XXtlasize16k -XXlargeobjectlimit16k -Xverbose:memory,cpuinfo -Xverboselog:/var/log/tomcat5/jvm.log -Xverbosetimestamp"
Here are excerpts from my verbose log (I'm getting some HT warning, not sure if that's a problem):
[Fri Oct 20 15:54:18 2006][22855][cpuinfo] Detected SMP with 2 CPUs that support HT.
[Fri Oct 20 15:54:18 2006][22855][cpuinfo] Trying to determine if HT is enabled.
[Fri Oct 20 15:54:18 2006][22855][cpuinfo] Trying to read from /dev/cpu/0/cpuid
[Fri Oct 20 15:54:18 2006][22855][cpuinfo] Warning: Failed to read from /dev/cpu/0/cpuid
[Fri Oct 20 15:54:18 2006][22855][cpuinfo] Trying to read from /dev/cpu/1/cpuid
[Fri Oct 20 15:54:18 2006][22855][cpuinfo] Warning: Failed to read from /dev/cpu/1/cpuid
[Fri Oct 20 15:54:18 2006][22855][cpuinfo] HT is: supported by the CPU, not enabled by the OS, enabled in JRockit.
[Fri Oct 20 15:54:18 2006][22855][cpuinfo] Warning: HT enabled even though OS does not seem to support it.
[Fri Oct 20 15:54:55 2006][22855][memory ] GC strategy: System optimized over throughput (initial strategy singleparpar)
[Fri Oct 20 15:54:55 2006][22855][memory ] heap size: 786432K, maximal heap size: 786432K
[Fri Oct 20 16:07:30 2006][22855][memory ] Changing GC strategy to generational, parallel mark and parallel sweep
[Fri Oct 20 16:07:30 2006][22855][memory ] 791.642-791.874: GC 786432K->266892K (786432K), 232.000 ms
[Fri Oct 20 16:08:02 2006][22855][memory ] 824.122: nursery GC 291998K->274164K (786432K), 175.873 ms
[Fri Oct 20 16:09:51 2006][22855][memory ] 932.526: nursery GC 299321K->281775K (786432K), 110.879 ms
[Fri Oct 20 16:10:24 2006][22855][memory ] 965.844: nursery GC 308151K->292222K (786432K), 174.609 ms
[Fri Oct 20 16:11:54 2006][22855][memory ] 1056.368: nursery GC 314718K->300068K (786432K), 66.032 ms
[Sat Oct 21 23:21:09 2006][22855][memory ] 113210.427: nursery GC 734274K->676137K (786432K), 188.985 ms
[Sat Oct 21 23:30:41 2006][22855][memory ] 113783.140: nursery GC 766601K->708592K (786432K), 96.007 ms
[Sat Oct 21 23:36:15 2006][22855][memory ] 114116.332-114116.576: GC 756832K->86835K (786432K), 243.333 ms
[Sat Oct 21 23:48:20 2006][22855][memory ] 114841.653: nursery GC 182299K->122396K (786432K), 175.252 ms
[Sat Oct 21 23:48:52 2006][22855][memory ] 114873.851: nursery GC 195060K->130483K (786432K), 142.122 ms
[Sun Oct 22 00:01:31 2006][22855][memory ] 115632.706: nursery GC 224096K->166618K (786432K), 327.264 ms
[Sun Oct 22 00:16:37 2006][22855][memory ] 116539.368: nursery GC 246564K->186328K (786432K), 173.888 ms
[Sun Oct 22 00:26:21 2006][22855][memory ] 117122.577: nursery GC 279056K->221543K (786432K), 170.367 ms
[Sun Oct 22 00:26:21 2006][22855][memory ] 117123.041: nursery GC 290439K->225833K (786432K), 69.170 ms
[Sun Oct 22 00:29:10 2006][22855][memory ] 117291.795: nursery GC 298947K->238083K (786432K), 207.200 ms
[Sun Oct 22 00:39:05 2006][22855][memory ] 117886.478: nursery GC 326956K->263441K (786432K), 87.009 ms
[Sun Oct 22 00:55:22 2006][22855][memory ] 118863.947: nursery GC 357229K->298971K (786432K), 246.643 ms
[Sun Oct 22 01:08:17 2006][22855][memory ] 119638.750: nursery GC 381744K->322332K (786432K), 147.996 ms
[Sun Oct 22 01:11:22 2006][22855][memory ] 119824.249: nursery GC 398678K->336478K (786432K), 93.046 ms
[Sun Oct 22 01:21:35 2006][22855][memory ] 120436.740: nursery GC 409150K->345186K (786432K), 81.304 ms
[Sun Oct 22 01:21:38 2006][22855][memory ] 120439.582: nursery GC 409986K->345832K (786432K), 153.534 ms
[Sun Oct 22 01:21:42 2006][22855][memory ] 120443.544: nursery GC 410632K->346473K (786432K), 121.371 ms
[Sun Oct 22 01:21:44 2006][22855][memory ] 120445.508: nursery GC 411273K->347591K (786432K), 60.688 ms
[Sun Oct 22 01:21:44 2006][22855][memory ] 120445.623: nursery GC 412391K->347785K (786432K), 68.935 ms
[Sun Oct 22 01:21:45 2006][22855][memory ] 120446.576: nursery GC 412585K->348897K (786432K), 152.333 ms
[Sun Oct 22 01:21:45 2006][22855][memory ] 120446.783: nursery GC 413697K->349080K (786432K), 70.456 ms
[Sun Oct 22 01:34:16 2006][22855][memory ] 121197.612: nursery GC 437378K->383392K (786432K), 165.771 ms
[Sun Oct 22 01:37:37 2006][22855][memory ] 121398.496: nursery GC 469709K->409076K (786432K), 78.257 ms
[Sun Oct 22 01:37:37 2006][22855][memory ] 121398.730: nursery GC 502490K->437713K (786432K), 65.747 ms
[Sun Oct 22 01:44:03 2006][22855][memory ] 121785.259: nursery GC 536605K->478156K (786432K), 132.293 ms
[Sun Oct 22 01:44:04 2006][22855][memory ] 121785.603: nursery GC 568408K->503635K (786432K), 71.751 ms
[Sun Oct 22 01:50:39 2006][22855][memory ] 122180.985: nursery GC 591332K->530811K (786432K), 131.831 ms
[Sun Oct 22 02:13:52 2006][22855][memory ] 123573.719: nursery GC 655566K->595257K (786432K), 117.311 ms
[Sun Oct 22 02:36:04 2006][22855][memory ] 124905.507: nursery GC 688896K->632129K (786432K), 346.990 ms
[Sun Oct 22 02:50:24 2006][22855][memory ] 125765.715-125765.904: GC 786032K->143954K (786432K), 189.000 ms
[Sun Oct 22 02:50:26 2006][22855][memory ] 125767.535-125767.761: GC 723232K->70948K (786432K), 225.000 ms
vvvvv
[Sun Oct 22 02:50:27 2006][22855][memory ] 125768.751-125768.817: GC 712032K->71390K (786432K), 64.919 ms
[Sun Oct 22 02:50:28 2006][22855][memory ] 125769.516-125769.698: GC 711632K->61175K (786432K), 182.000 ms
[Sun Oct 22 02:50:29 2006][22855][memory ] 125770.753-125770.880: GC 709632K->81558K (786432K), 126.000 ms
[Sun Oct 22 02:50:30 2006][22855][memory ] 125771.699-125771.878: GC 708432K->61368K (786432K), 179.000 ms
So, I'm running with the default GC strategy which lets the GC pick the most suitable approach (single space or generational). It seems to switch to generational almost immediately and runs well - most GC runs are in the nursery, and only once in a while it goes through the older space.
Now, if you look at [Sun Oct 22 02:50:27 2006], that's when everything changes. GC starts running every second (later on it's running 3 times a second) doing huge sweeps. It never goes through the nursery again, although the strategy is still generational.
It's all downhill from this point on, and it's a matter of hours (maybe a day) before we restart the server.
I guess my only question is: What would cause such GC behavior?
I would appreciate your ideas/comments!
Thanks,
Tenyo

AR 9.4.2 CPU usage on older systems (SUSE Linux 10.0)

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