Server Hangs after 17-22 users login

[Anantham]

Dear Friends,

Output of uname -a command.
HP-UX ANAND B.10.20 E 9600/803 2007679199 8-user license.

In that above mentioned server I could able to connect upto 15(approximately, some time 20 also no problem) users with out any problem.After that if I try to connect server it takes enough time to connect and some time(after 20-25 users)it comes out with directly.Also my server is having license for 31 users and output of uname -a command shows only 8-users.

In my company we are using clients loaded Windows-xp with SP2 and E-Term software is used in that for connection.

I am new to HP-UX.So,I am thankful to you if you can help in brief.

Regards

[Mel Burslan]

since you are running an old OS version like 10.20, I am wondering what type of machine you are running it on and how much physical memory you have. As you know machines have finite resources and every connecting user steals away from these resources and everytime they run a program, it steals more. And you may be simply running out of available resources.

please provide the output of these commands for further help

model
dmesg | grep -i physical #(or if you know the amount of memory you have)
tail -500 /var/adm/syslog/syslog.log # this is better if you can aattach it as it will be long and it needs to be run right after the failed/hung login attempts

[Robert-Jan Goossens_1]

Try to install the 10.20 unlimited user license

http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareDescription.jsp?locBasepartNum=wk144en〈=English

[Fabio Ettore]

Hi Murugan,

it sounds like a reached limit in the kernel parameter.
Check by

sam ---> kernel configuration ---> configurable parameters

maxusers
npty
nstrtel
nfile
nproc

Some of them should be tied by a formula.
Maybe your system is reaching one of them.
For example whent 15 users are connected check by

sar -v 10 10

and note file-sz for nfile and proc-sz for nproc. Are they on the limit?

HTH.

Best regards,
Fabio

[Anantham]

HP D-class(9000) server. I am not infront of server now.I will submit the syslog later.

[Mel Burslan]

if what I am suspecting is right, you have a very weak system. D-class machines are very old. And if you have upgraded or modified the application(s) running on it, or added a few more users, or even if one or more ofyour users learned how to use multiple terminal windows, you may be taxing the server too much.

Without seeing the actual error message when it kicks your request straight out, it is hard to tell the reason but I have a feeling that, it is something like "can not create a fork: insufficient resources", which means that, you may have a kernel parameter problem. You may need to bump up the "nproc" parameter along with few others. Please try to provide the error message you are getting when you are unable to connect, for better responses.

[HGN · Accepted solution]

Hi

You are runing a older version of the OS(10.20) I think you need to bump up the kernel parameter few of them are maxusers,npty like you already know the kernel parameter change requires a reboot once after that you should be better.

Rgds

HGN

[Robert-Jan Goossens_1]

sorry I gave you the wrong link.

700/800 support

http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareDescription.jsp?locBasepartNum=wk144en〈=English&prodTypeId=15351&prodSeriesId=377380&attTypeId=110

[Anantham]

Dear all,

Please find the output of the top,sar,iostat,vmstat and error message while trying to correct sam->Kernel configuration->Configurable parametars->(Here after if I select any parametars i am getting the below mentioned error message).







P Internal error: The kernel discovery tool used by SAM failed. ^
Kernel changes cannot be made by SAM. The standard error output of
the command is shown below:
C
getkinfo: Syntax error in system file.
Incorrect driver/subsystem statement(s): CentIf, CharDrv, asio0, asp,
c720, cdfs, clone


Each driver/subsystem shown above is not valid for one of the
following reasons: The driver (including any aliases) is not
recognized; there is no support for this driver in the kernel
libraries; the driver is not supported; one or more dependency
drivers for this driver are missing, not supported, or not included
in the kernel libraries.
Be sure all kernel libraries from HP-UX product filesets are
installed, and that the driver/subsystem names shown above are valid.
Refer to the SAM logfile for more information.

getkinfo: too many syntax errors found in file "/stand/vmunix".
Please ensure that you specified the correct file. Otherwise, please
correct these errors and try again.getkinfo: Unable to read the
kernel file








# vmstat
procs memory page
faults cpu
r b w avm free re at pi po fr de sr in
sy cs us sy id
1 112 0 2113 5069 2 1 0 0 0 0 0 228
979 83 4 2 93





System: VIP Wed Nov 16 17:44:53 2005
Load averages: 1.87, 1.55, 1.28
162 processes: 161 sleeping, 1 running
Cpu states:
LOAD USER NICE SYS IDLE BLOCK SWAIT INTR SSYS
1.87 90.10% 0.0% 0.2% 99.8% 0.0% 0.0% 0.0% 0.0%

Memory: 21748K (5588K) real, 25396K (7080K) virtual, 17172K free Page# 1/12

TTY PID USERNAME PRI NI SIZE RES STATE TIME %WCPU %CPU COMMAND
p4 1764 root 178 20 376K 284K run 0:00 0.28 0.26 top
? 1433 ase 154 20 8068K 3916K sleep 509:50 0.25 0.25 dataserver
p7 27416 nppd 154 20 408K 616K sleep 0:00 0.17 0.17 STATUS
? 3 root 128 20 0K 0K sleep 29:30 0.16 0.16 statdaemon
p2 22209 root 156 20 1812K 2132K sleep 0:01 0.09 0.09 samx
? 616 root 127 20 116K 76K sleep 5:03 0.06 0.06 netfmt
? 435 root 154 20 32K 24K sleep 12:14 0.05 0.05 syncer
? 56 root 100 20 0K 0K sleep 7:53 0.02 0.02 nvsisr
? 4 root 128 20 0K 0K sleep 1:20 0.02 0.02 unhashdaemon
? 2 root 128 20 0K 0K sleep 0:58 0.02 0.02 vhand
? 1 root 168 20 328K 116K sleep 0:00 0.02 0.02 init
? 0 root 128 20 0K 0K sleep 1:27 0.02 0.02 swapper
? 50 root 153 20 0K 0K sleep 0:01 0.02 0.02 lvmkd
? 51 root 153 20 0K 0K sleep 0:00 0.02 0.02 lvmkd




# swlist
# Initializing...
# Contacting target "VIP"...
#
# Target: VIP:/
#

#
# Bundle(s):
#

B2433BA_APZ B.11.25 HP COBOL/UX Developer Bundle for HPUX 10.
0 (S800)
B3901BA B.10.20.07 HP C/ANSI C Developer's Bundle for HP-UX
10.20 (S800)
B3919EA_AGL B.10.20 HP-UX 8-User License
B6267AA A.02.22 Unicenter TNG Framework For HP-UX 10.20_8
00
HPUXEngCR800 B.10.20 English HP-UX CDE Runtime Environment
OnlineDiag B.10.20.11.08 HPUX 10.0 Support Tools Bundle
SBFLEX A.05.12 FLEXlm Licensing for SoftBench Products
SBGNU D.06.20 GNU Sources for SoftBench Products
SoftBench-FLEXlm A.05.12 FLEXlm Licensing for SoftBench Products
SoftBench-GNUSRC D.06.20 GNU Sources for SoftBench Products
XSW800HWCR1020 B.10.20.41 Extension Software Patch Bundle









# iostat

device bps sps msps

c0t6d0 0 0.0 1.0
c0t3d0 0 0.0 1.0
c0t5d0 0 0.0 1.0
c0t2d0 0 0.0 1.0

# sar
# sar
#

Thanks in advance for all replies.


Regards,
KMurugan

[Anantham]

Server is working fine after installing unlimited user license.