srvbd1]root]/]>ps vg | head -1 ; ps vg | grep -w wait
PID TTY STAT TIME PGIN SIZE RSS LIM TSIZ TRS %CPU %MEM COMMAND
8196 - A 4448:23 0 384 384 xx 0 0 12.8 0.0 wait
53274 - A 4179:28 0 384 384 xx 0 0 12.1 0.0 wait
57372 - A 4436:05 0 384 384 xx 0 0 12.8 0.0 wait
61470 - A 4173:05 0 384 384 xx 0 0 12.0 0.0 wait
[srvbd1]root]/]>ps -ef | grep 8196| grep -v grep
[srvbd1]root]/]>
There are 4 "wait" commands and it occupies like 50 % of CPU, as showed by ps aux
Code:
[srvbd1]root]/]>ps aux | head -1; ps aux | sort -rn +2 | head -5
USER PID %CPU %MEM SZ RSS TTY STAT STIME TIME COMMAND
root 57372 12.8 0.0 384 384 - A Feb 20 4437:22 wait
root 8196 12.8 0.0 384 384 - A Feb 20 4449:41 wait
root 53274 12.1 0.0 384 384 - A Feb 20 4180:41 wait
root 61470 12.0 0.0 384 384 - A Feb 20 4174:17 wait
fin102 299090 0.2 0.0 1992 1976 - A 09:19:01 0:42 /u02/F10204/UBS/
[srvbd1]root]/]>
Please help me killing these wait process, as they are not real processes. Help would be greatly appreciated. Server performance is very poor, even login takes hell lotta time.
Moderator's Comments:
edit by bakunin: which part of "please use CODE-tags" was so hard to understand?
Does anyone know what the equivalent command to pwait on Solaris is on DG/UX. I need my script to kick off a process and wait till it is complete before continuing with the script. (4 Replies)
Hi,
is-it normal to have 86% of CPU for wait commande :
ps aux| head -20
UTIL PID %CPU %MEM SZ RSS TTY STAT STIME TIME COMMAND
root 516 86,6 0,0 12 12 - A 02 nov 2088:03 wait
oralfa01 54422 4,6 1,0 68044 39868 - A 09:20:06 2:27 oracleALFA01
If... (3 Replies)
Did not use 'wait' yet.
How I understand by now the wait works only for child processes, started background.
Is there any other way to watch completion of any, not related process (at least, a process, owned by the same user?)
I need to start a background process, witch will be waiting... (2 Replies)
hi,
i want to know cpu utilizatiion per process per cpu..for single processor also if multicore in linux ..to use these values in shell script to kill processes exceeding cpu utilization.ps (pcpu) command does not give exact values..top does not give persistant values..psstat,vmstat..does njot... (3 Replies)
Hi,
I collect statistics with nmon. I'm very suprised about % wait of processor.
Number Of Processors: 4
Processor Clock Speed: 4204 MHz
Do U have an idea about % wait ?
│ 0----------25-----------50----------75----------100 ... (1 Reply)
Hi All,
I have two ksh script. 1st script calls the 2nd script and the second script calls an 'C' program.
I want 1st script to wait until the 'C' program completes.
I cant able to get the process id for the 'C' program (child process) to make the 1st script to wait for the second... (7 Replies)
HI All
Am on Sun OS.While trying to start a process , we could see that the port is idle and we are not able to find the process holding that port.
Below is the result we get after using netstat command. lsof command is not yet installed in our machine.
netstat -a | grep "port no"... (5 Replies)
Hi ,
In a server /tmp has almost reached 75% and i can see the File system utilization is 48Mb only , so i believe some process is using the /tmp space. I would like to know which process is using /tmp space.
# df -h /tmp
Filesystem size used avail capacity Mounted on
swap ... (9 Replies)
Hi,
I can't seem to make sense of this. My wait time is showing really high but vmstat's and topas are showing normal usage.
ps aux
USER PID %CPU %MEM SZ RSS TTY STAT STIME TIME COMMAND
root 9961810 5680.7 0.0 448 384 - A Dec 16 6703072:12 wait
... (2 Replies)
Hello All,
The system concerned has multiple processes communicating with each other using shared memory. These processes use semaphores to protect data being used amongst them. The "key" would uniquely identifies the particular semaphore corresponding to a resource for the various processes.
... (2 Replies)
Discussion started by: saptarshi
2 Replies
LEARN ABOUT DEBIAN
bup-margin
bup-margin(1) General Commands Manual bup-margin(1)NAME
bup-margin - figure out your deduplication safety margin
SYNOPSIS
bup margin [options...]
DESCRIPTION
bup margin iterates through all objects in your bup repository, calculating the largest number of prefix bits shared between any two
entries. This number, n, identifies the longest subset of SHA-1 you could use and still encounter a collision between your object ids.
For example, one system that was tested had a collection of 11 million objects (70 GB), and bup margin returned 45. That means a 46-bit
hash would be sufficient to avoid all collisions among that set of objects; each object in that repository could be uniquely identified by
its first 46 bits.
The number of bits needed seems to increase by about 1 or 2 for every doubling of the number of objects. Since SHA-1 hashes have 160 bits,
that leaves 115 bits of margin. Of course, because SHA-1 hashes are essentially random, it's theoretically possible to use many more bits
with far fewer objects.
If you're paranoid about the possibility of SHA-1 collisions, you can monitor your repository by running bup margin occasionally to see if
you're getting dangerously close to 160 bits.
OPTIONS --predict
Guess the offset into each index file where a particular object will appear, and report the maximum deviation of the correct answer
from the guess. This is potentially useful for tuning an interpolation search algorithm.
--ignore-midx
don't use .midx files, use only .idx files. This is only really useful when used with --predict.
EXAMPLE
$ bup margin
Reading indexes: 100.00% (1612581/1612581), done.
40
40 matching prefix bits
1.94 bits per doubling
120 bits (61.86 doublings) remaining
4.19338e+18 times larger is possible
Everyone on earth could have 625878182 data sets
like yours, all in one repository, and we would
expect 1 object collision.
$ bup margin --predict
PackIdxList: using 1 index.
Reading indexes: 100.00% (1612581/1612581), done.
915 of 1612581 (0.057%)
SEE ALSO bup-midx(1), bup-save(1)BUP
Part of the bup(1) suite.
AUTHORS
Avery Pennarun <apenwarr@gmail.com>.
Bup unknown-bup-margin(1)
02-26-2013
