ls is taking long time to list

Thread Tools Search this Thread
Top Forums UNIX for Dummies Questions & Answers ls is taking long time to list
# 1  
Old 10-18-2012
ls is taking long time to list


All the data are kept on Netapp using NFS. some directories are so fast when doing ls but few of them are slow. After doing few times, it becomes fast. Then again after few minutes, it becomes slow again. Can you advise what's going on?
This one directory I am very interested is giving lot of issues. Here is little more about the directory.

/home/portal/htdocs/chip  ( inside this directory has many symbolic links) All of them lives on the Netapp.

# 2  
Old 10-18-2012
When you use NFS to access remote files, it keeps a cache of recently accessed blocks. As time goes by the cache is filled with more recently accessed files. So the first access when the cache is empty is relatively slow and later reads of the same page are relatively fast until those pages have been pushed out of the cache.
# 3  
Old 10-19-2012
The issue you are seeing could also be related to the disk that you are using be setup using "automount" instead of in /etc/fstab.

Take a look at the file "/etc/autofs.conf" (general location to see what is automounted).

Automounted file systems are mapped when accessed and dismounted upon it not being used after a timeout.

Man page for automount:
		   The number of seconds after which an automounted file sys-
		   tem will be unmounted if it hasn't been referred to within
		   that period of time.  The default is 10 minutes (600 sec-

# 4  
Old 10-19-2012
Then you do ls in first time, you read directory desctiptor.
If dir contain maaaaaany file (>10k) - this process is not fast.
In next requests ls use cached directory desctiptor and ls work fast
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Rm -rf is taking very long, will it timeout?

I have so many (hundreds of thousands) files and directories within this one specific directory that my "rm -rf" command to delete them has been taking forever. I did this via the SSH, my question is: if my SSH connection times out before rm -rf finishes, will it continue to delete all of those... (5 Replies)
Discussion started by: phpchick
5 Replies

2. Shell Programming and Scripting

Long list file display different time format.

Hi Gurus, I have some weird issue. when using ls -l the result shows different time format: -rw-r--r-- 1 abc gourp1 3032605576 Jun 14 2013 abc -rw-rw-r-- 1 abc gourp1 1689948832 Aug 10 06:22 abc one display 2013 which is year; another one displays 06:22 which is time. ... (4 Replies)
Discussion started by: ken6503
4 Replies

3. Shell Programming and Scripting

While loop problem taking too long

while read myhosts do while read discovered do echo "$discovered" done < $LOGFILE | grep -Pi "|" | egrep... (7 Replies)
Discussion started by: SkySmart
7 Replies

4. Solaris

How to find out bottleneck if system is taking long time in gzip

Dear All, OS = Solaris 5.10 Hardware Sun Fire T2000 with 1 Ghz quode core We have oracle application 11i with 10g database. When ever i am trying to take cold backup of database with 55GB size its taking long time to finish. As the application is down nobody is using the server at all... (8 Replies)
Discussion started by: yoojamu
8 Replies

5. UNIX for Dummies Questions & Answers

Job is taking long time

Hi , We have 20 jobs are scheduled. In that one of our job is taking long time ,it's not completing. If we are not terminating it's running infinity time actually the job completion time is 5 minutes. The job is deleting some records from the table and two insert statements and one select... (7 Replies)
Discussion started by: ajaykumarkona
7 Replies

6. UNIX for Dummies Questions & Answers

gref -f taking long time for big file

grep -f taking long time to compare for big files, any alternate for fast check I am using grep -f file1 file2 to check - to ckeck dups/common rows prsents. But my files contains file1 contains 5gb and file 2 contains 50 mb and its taking such a long time to compare the files. Do we have any... (10 Replies)
Discussion started by: gkskumar
10 Replies

7. Shell Programming and Scripting

<AIX>Problem in purge script, taking very very long time to complete 18.30hrs

Hi, I have here a script which is used to purge older files/directories based on defined purge period. The script consists of 45 find commands, where each command will need to traverse through more than a million directories. Therefore a single find command executes around 22-25 mins... (7 Replies)
Discussion started by: sravicha
7 Replies

8. Shell Programming and Scripting

For Loop Taking Too Long

I'm new from UNIX scripting. Please help. I have about 10,000 files from the $ROOTDIR/scp/inbox/string1 directory to compare with the 50 files from /$ROOTDIR/output/tma/pnt/bad/string1/ directory and it takes about 2 hours plus to complete the for loop. Is there a better way to re-write the... (5 Replies)
Discussion started by: hanie123
5 Replies

9. Red Hat

login process taking a long time

I'm having a bit of a login performance issue.. wondering if anyone has any ideas where I might look. Here's the scenario... Linux Red Hat ES 4 update 5 regardless of where I login from (ssh or on the text console) after providing the password the system seems to pause for between 30... (4 Replies)
Discussion started by: retlaw
4 Replies

10. UNIX for Dummies Questions & Answers

fetchmail taking long time to fetchmail...

Hi peeps, We are having around 60 users. The time set to retrieve the mail is 300 sec. But it's taking around 1 hour to deliver mails. I am using debian sarge 3.1. any clues? And how it will affect if I decrease the time? My machine has got 1 p4 3.0 GHZ processor and 1 GB ram. The home... (2 Replies)
Discussion started by: squid04
2 Replies
Login or Register to Ask a Question

Featured Tech Videos