...
This command line takes 45 minutes and returns nothing!
While this one comes right back showing all of xmls plus their details!
Does anybody have a clue why?
---------- Post updated at 02:26 PM ---------- Previous update was at 01:32 PM ----------
It's not running the second half of those commands. (The grep -l part)....
1) This is this "grep -l" part which cost the most that why the second command (which didn't run this part) was quicker.
Also if you run that second command after the first one, maybe the filnames were already in the cache because of the previous 45min command which may have done the heaviest part of the job
2) By default ls does a sorting by name which may be very consumming as well as painfull from performance point of view if you have a bunch of files (in your example : around 30000 xml files in a directory).
In such case you can use the -f option of the ls command (or -U or any equivalent option depending on your OS) so ls won't sort, and will take the file directly one after the other as they appear in the node structure which may be a lot faster than sorting them, especially when they are numerous.
I grepped for a string from a directory of very large files. This took quite a long time (not a problem). When I grepped for a different string from the same files immediately after, the output was MUCH quicker.
My question is, does anybody know why the second grep was so much quicker than the... (1 Reply)
Hello,
I have a Supermicro server with a P4SCI mother board running Debian Sarge 3.1. This is the "dmidecode" output related to RAM info:
RAM speed information is incomplete.. "Current Speed: Unknown", is there anyway/soft to get the speed of installed RAM modules? thanks!!
Regards :)... (0 Replies)
I am doing "ps -f" to see my process.
but I get lines that one of it represents the ps command itself.
I want to grep it out using -v flag, but than I get another process that belongs to the GREP itself :
I would like to exclude
# ps -f
UID PID PPID C STIME TTY TIME CMD... (2 Replies)
Hello
Ive written 2 programs in shell and I need to compare their speed (Compile) against one another.
what methods could I go about doing this?
Is there a feature in shell do accommodate this? (2 Replies)
i want to search in the current directory all the files that contain one word for example "hello"
i want to achieve it with the grep command but not with the grep * (2 Replies)
I analysed disk performance with blktrace and get some data:
read:
8,3 4 2141 2.882115217 3342 Q R 195732187 + 32
8,3 4 2142 2.882116411 3342 G R 195732187 + 32
8,3 4 2144 2.882117647 3342 I R 195732187 + 32
8,3 4 2145 ... (1 Reply)
hi
i'm greping the files with sepefic keyword, where the file is of too big. Assume there are 10 days log file each of more than 200mb. i've to grep all those files with a specific keywords.
for example,
1. i'll grep for error message
2. after the i'll do one more grep for keyword... (4 Replies)
Hi,
I have to grep string from 20 - 30 files each carries 200 - 300 MB size and append to the
file. How to speed the
grepping time.
cat catalina.out_2012_01_01 | grep "xxxxx" >> backup.txt
PLZ, Suggest me,
Regards,
Nanthagopal A (5 Replies)
Hi,
file1.txt
AAA
BBB
CCC
DDD
file2.txt
abc|AAA|AAAabcbcs|fnwufnq
bca|nwruqf|AAA|fwfwwefwef
fmimwe|BBB|fnqwufw|wufbqw
wcdbi|CCC|wefnwin|wfwwf
DDD|wabvfav|wqef|fwbwqfwfe
i need the count of rows of file1.txt present in the file2.txt
required output:
AAA 2 (10 Replies)
Hello,
I am running below command as root user
#nodetool cfstats tests | grep "Memtable switch count"
Memtable switch count: 12
Where as when I try to run same command as another user it gives different result.
#su -l zabbix -s /bin/bash -c "nodetool cfstats tests | grep "Memtable switch... (10 Replies)