du by default displays all directories and subdirectories recursively, and displays a number of bytes. The -s option tells it to only display the total for the outer directory, and the -h option puts it in human readable format (ie 1.0K instead of 1000).
Hi there,
When I run top on my machine it says I have 497M swap space in use, and 380M swap space free,
but I have only allocated 512M swap space to the machine!!!!
Does anyone know how swap used is calculated in the top command?
Thanks... (1 Reply)
Hi All,
Will df+du=Total space allocted for a file system??
Is the above correct. Please correct me If iam wrong.
In one my programs the above is not happening.
Please help me out.
Many thanks.
Regards,
Manas (2 Replies)
i am working with solaris 9 and my disk usages are
# df -k
Filesystem kbytes used avail capacity Mounted on
/dev/dsk/c0t0d0s0 2148263 1902721 202577 91% /
/proc 0 0 0 0% /proc
mnttab 0 0 0 ... (3 Replies)
Hey guys,
I am somewhat new to Solaris - and very new when it comes to mounts.
My problem is that when I installed Solaris, I allocated way too little diskspace to my / mount (it first became obvious now, however, because of new needs).
bash-3.00# df -h
Filesystem size ... (25 Replies)
I need to find available disk space for /home.
$ df /home
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/mahhh/VolGroup11-LogVol00
32281452 45028 26034172 15% /
$df /home |tail -1| awk '{print $4}'
15%
The above result shows the... (5 Replies)
Hi,
I want write a script that finds a set of folders written between a certain time and then find the disk space used by those folders. Can someone please help.
Thanks,
Sparcman:( (1 Reply)
Hi All,
I am using SSH Tectia terminal to get the disk space utilization of a particular folder /opt/logs in all the servers one by one using the command df -h and looking through the list of folders manually to get /opt/logs folder disk space used percentage .
The problem here is , it... (2 Replies)
Hi ,
I Would like to know the space allocated by adding up all the allocated space to group of filesystems ..
example ,
df -h|grep /db | awk '{ print $4 }' ---> giving me all the used space on the filesystem but need to know the total used space by adding up all the values (3 Replies)
Discussion started by: nsankineni
3 Replies
LEARN ABOUT BSD
ram
RAM(4) Kernel Interfaces Manual RAM(4)NAME
ram - ram disk driver
SYNOPSIS
/sys/conf/SYSTEM:
NRAM ram_size # RAM disk size (512-byte blocks)
major device number(s):
block: 3
minor device encoding:
must be zero (0)
DESCRIPTION
The ram pseudo-device provides a very fast extended memory store. It's use is intended for file systems like /tmp and applications which
need to access a reasonably large amount of data quickly.
The amount of memory dedicated to the ram device is controlled by the NRAM definition in units of 512-byte blocks. This is also patchable
in the system binary through the variable ram_size (though a patched system would have to be rebooted before any change took effect; see
adb(1)). This makes it easy to test the effects of different ram disk sizes on system performance. It's important to note that any space
given to the ram device is permanently allocated at system boot time. Dedicating too much memory can adversely affect system performance
by forcing the system to swap heavily as in a memory poor environment.
The block file accesses the ram disk via the system's buffering mechanism through a buffer sharing arrangement with the buffer cache. It
may be read and written without regard to physical disk records. There is no `raw' interface since no speed advantage is gained by such an
interface with the ram disk.
DISK SUPPORT
The ram driver does not support pseudo-disks (partitions). The special files refer to the entire `drive' as a single sequentially
addressed file.
A typical use for the ram disk would be to mount /tmp on it. Note that if this arrangement is recorded in /etc/fstab then /etc/rc will
have to be modified slightly to do a mkfs(8) on the ram disk before the standard file system checks are done.
FILES
/dev/ram block file
/dev/MAKEDEV script to create special files
/dev/MAKEDEV.local script to localize special files
SEE ALSO hk(4), ra(4), rl(4), rk(4), rp(4), rx(4), si(4), xp(4)dtab(5), autoconfig(8)DIAGNOSTICS
ram: no space. There is not enough memory to allocate the space needed by the ram disk. The ram disk is disabled. Any attempts to access
it will return an error.
ram: not allocated. No memory was allocated to the ram disk and an attempt was made to open it. Either not enough memory was available at
boot time or the kernel variable ram_size was set to zero.
BUGS
The ram driver is only available under 2.11BSD.
3rd Berkeley Distribution Januray 27, 1996 RAM(4)