How to flush the RAM ?

[Bernhardiner]

Hi,

does a script exist or which command can be used to flush the RAM in any Puppy?

Regards,
Bernhardiner

[ttuuxxx]

Here try this, just extract it and run it in a terminal

[bigpup]

The question is.
Why do you want to do this?
What is the problem?

[Bernhardiner]

Thank you, ttuuxxx.
It seems to work.

It can be the RAM is not big enough, or it is better not to save everything in the save file.

Regards,
Bernhardiner

[ttuuxxx]

Thank you, ttuuxxx.
It seems to work.

It can be the RAM is not big enough, or it is better not to save everything in the save file.

Regards,
Bernhardiner

Your welcome also delete /root/.cache on a regular basis

[bigpup]

The save process, for updating the save, is only going to put stuff in the save that needs to be in the save.
It does not put everything that is in memory in the save.
This is not something to worry about.

If you do not want anything new going into the save automatically.
Setup the options in Puppy Event Manager>Save Session.

To make a hard drive install be able to use these options.
In the menu entry that boots it.
Change the pmedia= to pmedia=usbflash.
That will make it run in pupmode 13 and not pupmode 12.

[Bernhardiner]

Hi,

Thanks again, ttuuxxx.

Somewhere in this forum it is written that everything in RAM is saved in the save file.
That is independent from saving manually or automatically.
Thanks for the info about pmedia=usbflash, bigpup.

Regards,
Bernhardiner

[backi]

Hi Tttuuxxx !
Your script does work .......but.....it also un-mounts the swapdrive without re-enabling it again......this is a bit annoying.

[bigpup]

Somewhere in this forum it is written that everything in RAM is saved in the save file.

No.
That is someone making too general a statement.

Not everything in ram goes into the save.
Only any changed settings.
Only anything added to Puppy that is not already in the save.
Only stuff already in the save that has changed and only those changes.

[vovchik]

Dear all,

This works for me:

Code: Select all

#!/bin/bash
## Bash Script to clear cached memory on (Ubuntu/Debian) Linux
## By Philipp Klaus
## see <http://blog.philippklaus.de/2011/02/clear-cached-memory-on-ubuntu/>

if [ "$(whoami)" != "root" ]
then
  echo "You have to run this script as Superuser!"
  exit 1
fi

# Get Memory Information
freemem_before=$(cat /proc/meminfo | grep MemFree | tr -s ' ' | cut -d ' ' -f2) && freemem_before=$(echo "$freemem_before/1024.0" | bc)
cachedmem_before=$(cat /proc/meminfo | grep "^Cached" | tr -s ' ' | cut -d ' ' -f2) && cachedmem_before=$(echo "$cachedmem_before/1024.0" | bc)

# Output Information
echo -e "This script will clear cached memory and free up your ram.\n\nAt the moment you have $cachedmem_before MiB cached and $freemem_before MiB free memory."

# Test sync
if [ "$?" != "0" ]
then
  echo "Something went wrong, It's impossible to sync the filesystem."
  exit 1
fi

# Clear Filesystem Buffer using "sync" and Clear Caches
sync && echo 3 > /proc/sys/vm/drop_caches

freemem_after=$(cat /proc/meminfo | grep MemFree | tr -s ' ' | cut -d ' ' -f2) && freemem_after=$(echo "$freemem_after/1024.0" | bc)

# Output Summary
echo -e "This freed $(echo "$freemem_after - $freemem_before" | bc) MiB, so now you have $freemem_after MiB of free RAM."

exit 0

With kind regards,
vovchik

[B.K. Johnson]

bigpup
I use that pmedia=usbflash with syslinux.cfg, but where does one make the related change in a Grub4Dos configured system?
TIA

[rockedge]

@vovchik

nice little script..thanks for the tip.

[musher0]

Hello, all.

About 4 years ago, the French side (forum members jplt, Médor, myself,
with suggestions from ASRI and augras, etc.) produced this.

Parms you can pass as $1 are as follows:
# "chrono" : save as a history file; no window pops up;

# "simple" : for operation from the terminal;

# "histo" : combines the two above.
If you wish to consult the history, for monitoring purposes.
-=> useful if you think something is wrong with your RAM; <=-
You run it every now and then during your session. Readings are saved
in file /root/my-documents/tmp/suivimev.his

# "flafla", "bling" or nothing: show results with transparency (default).

E.g. < ./cleanup_memory bling > will show the results as in the scrot.
The title bar shows how much RAM was recoup'ed, and if swap is in use.

Whatever little text there is is shown in the language of the system. At
this time EN or FR only; translators for other languages welcome.

Requires the real less, not the busybox one. If

Code: Select all

ls -Algor /usr/bin/less

does not show a symbolic link, you have the real less.

Enjoy. BFN.

[Flash]

I think the browser is the usual culprit that fills the RAM with junk. I find that restarting the graphical server, which kills Firefox, then restarting Firefox and telling it to restore the tabs it had open before it was killed, seems to clear out a lot of junk while leaving the browser the way it was before restarting the graphical server.

[dancytron]

bigpup
I use that pmedia=usbflash with syslinux.cfg, but where does one make the related change in a Grub4Dos configured system?
TIA

Just add it on the line that starts with "kernel", like so:

title Puppy Linux precise572a in sda3 dir precise572a
rootnoverify (hd0,1)
kernel /precise572a/vmlinuz pmedia=usbflash psubdir=precise572a
initrd /precise572a/initrd.gz

[B.K. Johnson]

dancytron
Thanks for responding.

[bigpup]

Just to add to above information.
All Grub4dos menu entries should already have a pmedia= in their kernel line entries.
Just change the pmedia= that is already there to pmedia=usbflash
There needs to be only one pmedia= entry.

Understand that when you do this. Puppy will run in pupmode 13. It will use a saveramdisk that is going to use some ram all the time.
Everything that normally goes into the save, will stay in this saveramdisk, until you choose to have it go into the real save file/folder, by having a set time to flush to the save file/folder, clicking on the save icon on the desktop, or do a shutdown.
Setting options are in Puppy Event Manager>Save Session.