Hi, i'm having an issue with a client,ADD MORE MEMORY! 640MB is not a lot for 6 clients and each running Dosemu, OpenOffice, etc. Dosemu allows for DOS applications to run. But, DOS was never meant to be multi-user by design.
after a while of using the system the clients start feeling slower, specially when someone tries to open a document with openoffice, it lags for a while and then shows up the document.
This is becoming an issue and i need to solve it, so i ask for help,
1. how can i diagnose which is the problem? i've already check top but the cpu doesn't scale to high, and the swap levels are low (usually no more than 2mb)
2. is there some site with local apps packages for ltsp 4.0?
3. anyone outthere has similar issues? how did u solved it?
4. Info:
LTSP 4.0 + Gentoo
SW: XFCE4 + Firefox + Thunderbird + Openoffice + aMSN + xfe
# clients: 6 (would grow 'til 15)
Clients HW: cel/athl/p2 - 128M
Srvr HW: UP P3-1G - 640MB - 640MB swap - 36GB SCSI (Compaq ML330)
You can never have enough memory. Besides, Linux will use the extra memory for disk buffers to load entire files into memory instead of pieces at a time.
Ideally, if you could re-write your DOS application to use Linux natively, you would see speed improvement.
Another way to improve system performance is to use RAID level - 5. This provides redundancy and striping. Disk striping allows the data to be written over several disks at the same time. If you have multiple disk, especially on separate bus cables, you can improve your system performance greatly. It's the same concept as a CPU going from a 32-bit bus to a 64-bit bus. In the RAID case, you increase the number of bits for data access from the hard drives.
And finally, do system accounting on your kernel. See where the bottlenecks are, and tune the kernel for your needs.
Ken Cobler
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