Sponsored Content
Top Forums UNIX for Dummies Questions & Answers is process data cached somewhere? Post 302438603 by pludi on Tuesday 20th of July 2010 07:08:25 AM
Old 07-20-2010
Disk information (including directory contents) that has recently been access is stored in the disk cache in memory by the kernel should it be needed again. Until something overwrites this cache (eg. a newer read on a large file) or the related data on the disk gets changed (the cache pages becomes "dirty") any reads on that data are done in memory.
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

how to remove cached squid??

hi, how do i remove the cache from squid automatically every day?/ ie., from /var/spool/squid/ all the directories which has been cached here and restart ONLY squid without rebooting the system, including the swap.state files thanx in advance cheers (1 Reply)
Discussion started by: balu
1 Replies

2. UNIX for Dummies Questions & Answers

dummy question on data process

I have a file which contains 6 columns. But I only need the first 3 columns. So I need to remove the last 3 columns. I checked 'cut' but it seems not working. So is there a command that could remove certain columns from a file? :( Thanks a lot!! (5 Replies)
Discussion started by: kaixinsjtu
5 Replies

3. Shell Programming and Scripting

How should i know that the process is still processing data

I have some process . How should i know that the process is still processing data or got hanged even though it is showing that it is running in background I know of a command called truss. how should i use this command and determine 1) process is still processing data 2) process got hanged... (7 Replies)
Discussion started by: ali560045
7 Replies

4. UNIX for Dummies Questions & Answers

Release the memory which is cached.

Hi, Can any one suggest me the way how can get mamory which has been cached during a process execution without rebooting the machine? (1 Reply)
Discussion started by: siba.s.nayak
1 Replies

5. Programming

how to get the process data structure through pid?

hello guys, i'm required to modify the process scheduling part of the freebsd kernel as part of our homework. the homework needs us add a new variable to the process data structure, and the priority of the process will be having something to do with the variable. to adjust the variable... (2 Replies)
Discussion started by: billconan
2 Replies

6. Shell Programming and Scripting

data sharing between process

hi ! i want to make 2 c prog such tht if i give an input in 1st prog then i can use tht input in 2nd. so over all i want to do data sharing between process using files. plz give me suggestions how can i achieve this ? thanks ya! (2 Replies)
Discussion started by: Sgupta
2 Replies

7. UNIX for Advanced & Expert Users

GID mappings cached?

We had a mapping to one UNIX box just fine, the server was changed to another UNIX box and now when mapping drives from Windows box to new UNIX box, we get the old GID associated with our Windows user. When checking on new UNIX box, we see GID of 108, which is what we want, but when we map the... (0 Replies)
Discussion started by: bd4021
0 Replies

8. UNIX for Dummies Questions & Answers

Difference between buffered disk reads and cached reads?

I was analyzing the Disk read using hdparm utility. This is what i got as a result. # hdparm -t /dev/sda /dev/sda: Timing buffered disk reads: 108 MB in 3.04 seconds = 35.51 MB/sec # hdparm -T /dev/sda /dev/sda: Timing cached reads: 3496 MB in 1.99 seconds = 1756.56 MB/sec... (1 Reply)
Discussion started by: pinga123
1 Replies

9. HP-UX

How to extract data for a specific process from ovpa?

Hi Friends, One question. Supposed I want to extract data only for process named "sqlplus" how can I do it. Any suggestions? I don't want all the data as it is not useful to me e.g.. Command I use is given below extract -xp -p -r repfile -b"03/15/13 7:00 PM" -e"03/15/13 09:30 PM" -f... (1 Reply)
Discussion started by: kunwar
1 Replies

10. SuSE

Cached account info

Hello, A admin at work created accounts for me on about 20 SLES 11 servers. He gave me the wrong home directory. He also didn't create a home directory for me on the servers. I have root/sudo on the systems. I usually use the usermod command or just modify the /etc/passwd file to fix issues like... (11 Replies)
Discussion started by: bitlord
11 Replies
CACHEINFO(5)							AFS File Reference						      CACHEINFO(5)

NAME
cacheinfo - Defines configuration parameters for the Cache Manager DESCRIPTION
The cacheinfo file defines configuration parameters for the Cache Manager, which reads the file as it initializes. The file contains a single line of ASCII text and must reside in the /etc/openafs directory. Use a text editor to create it during initial configuration of the client machine; the required format is as follows: <mount>:<cache>:<size> where <mount> Names the local disk directory at which the Cache Manager mounts the AFS namespace. It must exist before the afsd program runs. The conventional value is /afs. Using any other value prevents traversal of pathnames that begin with /afs (such as pathnames to files in foreign cells that do use the conventional name). The -mountdir argument to the afsd command overrides this value. <cache> Names the local disk directory to use as a cache. It must exist before the afsd program runs. The standard value is /usr/vice/cache, but it is acceptable to substitute a directory on a partition with more available space. Although the Cache Manager ignores this field when configuring a memory cache, a value must always appear in it. The -cachedir argument to the afsd command overrides this value. <size> Specifies the cache size as a number of 1-kilobyte blocks. Larger caches generally yield better performance, but a disk cache must not exceed 90% of the space available on the cache partition (85% for AIX systems), and a memory cache must use no more than 25% of available machine memory. The -blocks argument to the afsd command overrides this value. To reset cache size without rebooting on a machine that uses disk caching, use the fs setcachesize command. To display the current size of a disk or memory cache between reboots, use the fs getcacheparms command. EXAMPLES
The following example cacheinfo file mounts the AFS namespace at /afs, establishes a disk cache in the /usr/vice/cache directory, and defines cache size as 50,000 1-kilobyte blocks. /afs:/usr/vice/cache:50000 SEE ALSO
afsd(8), fs_getcacheparms(1), fs_setcachesize(1) COPYRIGHT
IBM Corporation 2000. <http://www.ibm.com/> All Rights Reserved. This documentation is covered by the IBM Public License Version 1.0. It was converted from HTML to POD by software written by Chas Williams and Russ Allbery, based on work by Alf Wachsmann and Elizabeth Cassell. OpenAFS 2012-03-26 CACHEINFO(5)
All times are GMT -4. The time now is 07:46 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy