Sponsored Content
Top Forums UNIX for Advanced & Expert Users Memory fragmentation in a Linux settop box Post 302908391 by achenle on Monday 7th of July 2014 12:57:28 PM
Old 07-07-2014
What's using all that cache?

IO? For streaming large files, caching is irrelevant because you're almost never going to need to replay any one block. Use direct IO and bypass the page cache, and quit thrashing memory.

Last edited by achenle; 07-07-2014 at 04:22 PM..
 

10 More Discussions You Might Find Interesting

1. Filesystems, Disks and Memory

Memory usage in the box

Hello: Environment is: Oracle 817 on IBM RS/6000 AIX 433 I have 4GB RAM on the box and Page/Swap is about the same. Presently I am using close to 1GB of RAM towards 5 instances of ORACLE production environments. How can I know, how much of memory/RAM is used for : Oracle Processes , I... (2 Replies)
Discussion started by: ST2000
2 Replies

2. UNIX for Dummies Questions & Answers

Fragmentation command in linux?

Hi, Please let me know more details on fragmentation in redhat linux and command to check fragmented files? Thanks, Bache Gowda (2 Replies)
Discussion started by: bache_gowda
2 Replies

3. Shell Programming and Scripting

Script to Reboot a linux box from a windows box

HI All, I need a script to reboot a linux box from a windows box. The script needs to run automatically whenever a sitescope alerts with an error message. Have searched for this in the forums, but could not get something relative. Pls. let me know the various alternatives we have to do... (2 Replies)
Discussion started by: Crazy_murli
2 Replies

4. HP-UX

help me decipher how much memory on my box

hi, if I do top, I get Memory: 19277012K (5868296K) real, 33860312K (11294208K) virtual, 795392K free If I do swapinfo -tm I get: % swapinfo -tm Mb Mb Mb PCT TYPE AVAIL USED FREE USED dev 16384 0 16383 0% dev ... (3 Replies)
Discussion started by: JamesByars
3 Replies

5. Linux

my box can't see full memory

Hi I'be recently installed Virtouzzo on Centos 5 on 16GB box , but the system could only see 4 GB of RAM, I installed the package kernel-PAE, but the virtuozzo kernel still can't see the full memory. even the kernel system can see 16GB of RAM is there any idea bout that ? Thanks (2 Replies)
Discussion started by: Raied
2 Replies

6. Solaris

Memory of box

I have certain questions. 1) How can i see the memory of the unix box. 2) How can i see the size of the database on the box 3)can anyone suggest an article or tutorial that explains the concept of file systems and mount point in UNIX. 4)How can i see the dblink on the server I... (5 Replies)
Discussion started by: asalman.qazi
5 Replies

7. Solaris

Memory issue on solaris10 box

my system has 128G of installed memory. top, vmstat shows the system has just over 10G of free memory on the system. but as per prstat o/p the usage is just 50-55G is there anyway i can find which process/zone is using more memory ? System has 3 zones and all running application servers. ... (1 Reply)
Discussion started by: fugitive
1 Replies

8. UNIX for Dummies Questions & Answers

Mounting Linux box to Linux box

Hi, I've been able to mount my linux box to a windows machine, but I can't seem to mount my linux box to another linux box I have. (I know I could scp, but for other reasons I need to do it this way) Samba is installed. Here is an example where I mount to a Win machine.--> works fine mount... (12 Replies)
Discussion started by: jdilts
12 Replies

9. Red Hat

How to access redhat Linux box graphically from windows box?

Hi I have a linux box and need to access from windows graphically # uname -a Linux pc-l416116 2.6.18-155.el5 #1 SMP Fri Jun 19 17:06:47 EDT 2009 i686 i686 i386 GNU/Linux What components do I need to install on Linux and windows to do that? TIA (6 Replies)
Discussion started by: magnus29
6 Replies

10. How to Post in the The UNIX and Linux Forums

Copying , renaming the file from windox box and ftp to Linux box

Hello my dear friends, Two file are auto generated from mon - fri at different directories on same windows box.Every day i have to copy the file, rename it (specific name)and ftp it to linux box specified directory. is it possible to automate this process,If yes this has to be done from windows... (1 Reply)
Discussion started by: umesh yadav
1 Replies
dbc_max_pct(5)							     OBSOLETED							    dbc_max_pct(5)

NAME
dbc_max_pct, dbc_min_pct, bufcache_max_pct, bufpages, nbuf - OBSOLETED kernel tunable parameter DESCRIPTION
These tunables have been obsoleted and removed. Do not make any changes to these tunables, as they have no effect on the kernel. Use the file cache tunables and (see filecache_max(5)). In previous releases, the tunables and were used to set limits to the dynamic buffer cache, and the tunables and were used for tuning the buffer cache when a static cache was desired. This release of HP-UX offers improved file caching technology and improved physical memory control associated to caching file I/O data. The number of tunable parameters used to control file caching memory usage is reduced from five to two, and previous usability issues are addressed. Restrictions on Changing These tunables should not be modified. Attempting to tune any of the obsolete buffer cache tunables, or results in an error. Use the tunables and to set limits on the file cache. Note that, on a any given system, the optimum values of these two new tunables are not necessarily equivalent to the optimum values of the obsolete buffer cache tunable values in the older systems. You should first deter- mine if the new default values yield acceptable performance on your system, before attempting to change the values of the new file cache tunables. AUTHOR
and were developed by HP. SEE ALSO
filecache_max(5). Kernel Tunable Parameter dbc_max_pct(5)
All times are GMT -4. The time now is 04:16 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy