Hello everybody.
I have a problem with my AIX 5.3. Recently my unix shows a high cpu utilization with sar or topas.
I need to find what I have to do to solve this problem, in fact, I don't know what is my problem.
I had the same problem with another AIX 5.3 running the same... (2 Replies)
Hi All,
While creating zone we will mention min and max cpu cores, like
add dedicated-cpu
set ncpus=NUM_CPUS_MIN-NUM_CPUS_MAX
end
Ques1:
Suppose thing that non global zone uses only minimum cores at particular time What the other cores will do, Will it shared to global zone?
Ques:2... (1 Reply)
There might be some problem with my server,
because every morning at 7, it's performance become bad with no DB extra deadlock.
But I just couldn't figure it out.
Please give me some advise, thanks a lot...
According to the CPU performace chart, Daily CPU loading Maximum: 42 %, Average:36%.
... (8 Replies)
i need help, i will always accord mine if my scope allows me, help me in this one..
am running vmware 7.0 in winserver 2008 on a cq61-425el, my network driver is installed correctly. and my vmware network drivers have added as well (in the device manager section).
During installation i wasnt... (0 Replies)
We have a DB server which is constantly utilised above 95% above.
This is becoming nuisance when the monitoring team frequently calls to check on it. Frankly I do not know what to tweak or even interpret the outputs.
I noticed constant 30 to 60% in wio column of the cpu utilisation.
There... (1 Reply)
I want to write a shell script which will print AIX
CPU utilization
memory utilization
every 5 mins redirect to file. How do i do it? Please advise.
Which commands I should use? (3 Replies)
I've moved a physical server over to VMWare ESXi 5.1 using SCO 6.0 with MP4. For whatever reason, people are occasionally getting kicked out or are closing out their telnet session and it is leaving their processes running. When this happens, the sar %idle drops from 98-95% down to 25-20%. ... (1 Reply)
Hi all,
Been reading a lot of the cpu load and its "analogy of it to car traffic path of expressway"
From wiki
Most UNIX systems count only processes in the running (on CPU) or runnable (waiting for CPU) states. However, Linux also includes processes in uninterruptible sleep states... (13 Replies)
In my oracle db server we have 15 cores (power8). The output of the vmstat is as below.
System configuration: lcpu=128 mem=208800MB ent=16.00
kthr memory page faults cpu time
-----------... (18 Replies)
Just restarted MySQL a few times.
There seems to be a problem with MySQL performance because one table (our man page table) is too large and I need to move that table to a new database and out of the main forums DB.
That table is over 7 GB, bigger than the rest of the DB combined:
... (14 Replies)
Discussion started by: Neo
14 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)