06-11-2009
Quote:
Originally Posted by
Devyn
Ok. That's fine too. Would you know which parts of kstat output shows the total # of pages cached or at least which vars contain this so I can calculate this?
None.
Quote:
Yes I know. I was interested in getting this number using kstat values as mdb is slow and because of this impractical.
My understanding is this statistic isn't maintained in real-time so must be computed by analysing the pages. The reason why ::memstat is slow.
Quote:
Yes of course. Let me rephrase. On Solaris, the memory reported by vmstat per my understanding already does not include cache. Solaris considers the cache portion as memory it can grab as needed so it sees it as free. This makes sense to me and so any usage reported through Solaris commands is the portion used that is not cache. Please correct me if I'm wrong.
This is correct for UFS, not for ZFS.
Quote:
In light of above, of the physical ram Solaris sees as free, what portion of that is Cache?
This information isn't available from kstat output.
10 More Discussions You Might Find Interesting
1. Windows & DOS: Issues & Discussions
Pls! will someone help me on how to clear my cache memory of my Internet browser
Thanks
Kayode (3 Replies)
Discussion started by: kayode
3 Replies
2. Solaris
I started a previous thread :
https://www.unix.com/sun-solaris/76721-coredumps-swap-part-solaris-mem-consumption.html
But my fault as there is no xml feed for this forum i lost track and thread got closed. So in the mean time i went through some docs and here are my queries :
1. mdb -k... (2 Replies)
Discussion started by: rajwinder
2 Replies
3. UNIX for Dummies Questions & Answers
Hi,
I'm running a debian lenny 1GB ram, but with a high I/O. This server has 400IOPS and 3MB/s sustain. So, I noted cached memory use 800MB, buffered memory use 50MB, and no free memory is available. Questions:
What does mean such a high cached memory?
Who's using this cached memory?
Is... (3 Replies)
Discussion started by: iga3725
3 Replies
4. Linux
Hi All,
could any one point out any open source test-suites for "File cache" testing and as well as performance test suites for the same. Currently my system is up with Linux/ext4.
Regards
Manish (0 Replies)
Discussion started by: hmanish
0 Replies
5. Red Hat
Right now i am using Red Hat Enterprise Linux AS release 4 and cache memory occupying around 1.5GB mentioned below,
total used free shared buffers cached
Mem: 2026 2021 5 0 161 1477
-/+ buffers/cache: 382 1644 ... (4 Replies)
Discussion started by: thakshina
4 Replies
6. Programming
Hi friends,
Hope everyone is doing well. Please have a look at this simple program, you will figure out what I want.
#include <stdio.h>
int main()
{
printf("Enter an integer!\n");
scanf( "%d", 134511890 ); // Valid address on my computer
printf( "%d\n", ???? );
return 0;
}
... (3 Replies)
Discussion started by: gabam
3 Replies
7. Programming
The environment is Java/Windows. The program keeps near real-time state in memory cache, which is updated by multiple sources, size of the cache is roughly 500 MB, frequency of updates is ~ 20 per second. I am looking into different ways to keep current snapshot of the memory on the disk for a)... (9 Replies)
Discussion started by: migurus
9 Replies
8. Solaris
hi all,
i have noticed that my server has 64 GB RAM and i have application in this server but the server has free memory only 15% and utilized 85% however it didn't eat from swap .
does any parameter can be configured in kernel to make the system clear memory from cache like linux
i found... (4 Replies)
Discussion started by: maxim42
4 Replies
9. UNIX for Dummies Questions & Answers
i wish to clear memory cache on a production box and i was wondering what is the worst that can happen if i do?
i already tested this on a backup server and everything seemed fine.
but i need to know from you experts what are the worst things that can happen when i run it on a real server:
... (5 Replies)
Discussion started by: SkySmart
5 Replies
10. Programming
#include<stdio.h>
#include<stdlib.h>
#include<sys/time.h>
#include<time.h>
#include "rdtsc.h"
#define SIZE 4*64*1024
int main()
{
unsigned long long a,b;
int arr={0};
int i;
register int r;
a=rdtsc();
r=arr;
b=rdtsc();
printf("1st element Access Cycles = %llu\n",b-a); (2 Replies)
Discussion started by: Vaibhavs1985
2 Replies