Slow performance!!! System using a lot of Physical Memory SLOW HELP!
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Slow performance!!! System using a lot of Physical Memory SLOW HELP!
I am wondering why Linux is so much slower then my windows box which runs off the same machine. Could some one tell me why Ubuntu is using so much Physical memory and so little swap. I am tired of the sad and sluggish performance, i am not even runing any damanding software.
here is some of my system stats and info which I pulled off of my phpsysinfo page:
Memory Usage
Type Percent Capacity Free Used Size
Physical Memory 90% 25.77 MB 225.01 MB 250.78 MB
Disk Swap 14% 630.57 MB 98.90 MB 729.47 MB
Hardware Information
Processors 1
Model Intel(R) Celeron(TM) CPU 1300MHz
Chip MHz 1297.32 MHz
Cache Size 256 KB
System Bogomips 2572.28
PCI Devices 0000:00:07.1 IDE interface: VIA Technologies, Inc. VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE
0000:00:07.5 Multimedia audio controller: VIA Technologies, Inc. VT82C686 AC97 Audio Controller
0000:00:08.0 VGA compatible controller: nVidia Corporation NV5M64 [RIVA TNT2 Model 64/Model 64 Pro]
0000:00:09.0 Communication controller: Conexant: Unknown device 2f14
0000:00:0a.0 Ethernet controller: Atheros Communications, Inc. AR5212 802.11abg NIC
0000:00:0b.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+
IDE Devices hda: ST330621A (Capacity: 27.96 GB)
hdb: Maxtor 5T060H6 (Capacity: 57.27 GB)
hdc: CD-W58E
SCSI Devices HP photosmart 7200 (Direct-Access)
USB Devices Linux 2.6.12-10-386 uhci_hcd VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (#2) 0000:00:07.3
Linux 2.6.12-10-386 uhci_hcd VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller 0000:00:07.2
hp photosmart 7200 series CN38B2B65CI5
Network Usage
Device Received Sent Err/Drop
lo 5.50 MB 5.50 MB 0/0
eth0 0.00 KB 0.00 KB 0/0
ath0 196.54 MB 87.00 MB 230537/0
sit0 0.00 KB 0.00 KB 0/0
I would have to agree with sundialsvcs, I doubt you have DMA enabled on the hard drive... the numbers you have posted above are poor. My laptop does way better,
Timing buffered disk reads: 82 MB in 3.07 seconds = 26.73 MB/sec
Timing cached reads: 1408 MB in 2.00 seconds = 703.96 MB/sec
and I would expect better numbers on a Desktop system unless it is getting old... I have a newer desktop system here that does 55.41MB/sec for buffered disk reads. Could you post the output of "hdparm /dev/hda", it should report drive settings, & "using_dma" should be "1 (on)" or you will be disapointed with the results. I wouldn't be worried about seeming high memory usage as Linux will use most of the available memory for caching and free it up as needed. More memory would almost surely help, but I would make sure DMA is enabled on the hard drive first.
Distribution: Mandriva mostly, vector 5.1, tried many.Suse gone from HD because bad Novell/Zinblows agreement
Posts: 1,606
Rep:
This was a good gamble. Yes HD performance look poor. Nothing odd from top.
There is plenty about hdparm, e.g. http://www.linux-1u.net/Disks/hdparm.txt
Try below for example
hdparm -c3 -d1 -X69 /dev/hda
Your computer hardware is fast, but default Ubuntu isn't. There's a project called Ubuntu Lite which tries to bring a fast and easy desktop. http://www.ubuntulite.org/
And if you want to try out a linux distro which is meant to be fast, try arch linux: http://www.archlinux.org
It boots double as fast as ubuntu. And runs faster. Plus I think it's really simple.
You should try out Mandriva (formerly Mandrake), i bet it has best performance out of all possible Linuxez i have seen,I was facing similar problem with Redhat then.
One more tip: try using KDE, its cool,smart & faster ;-D
I've run Mandrake up to 10.1 quite happily on a 1000MHz celeron with 256MB so I cannot believe that RAM is an issue.
Possibly subjectively (no flames please) I think KDE is faster tham Gnome but not enough to merit the complaint.
90% memory usage is not in itself a problem. A lot of it is buffers. Run free and see what it says.
One possibility worth checking is the memory timings in CMOS setup. Although Windows is running OK the settings may be non-optimal and Linux is more aggresive towards hardware than Windows is. This comment can be valid for both too slow and too fast timings. I once had a situation (under Windows) where I set the timings too fast and the machine slowed down dramatically, probably because of missed accesses.
I have the same problem too. I am running Xardros (KDE 3.?). When doing absolutely nothing it consumes almost ALL memory (AMD athlon 2800, 1 gig mem). It claims to run on a p2 450mhz with 64mb mem, recommend.
How do I turn it on? I have read articles about doing it but I can't get it to work. Please explain it to me like I am your grandmother who wants to know how to send an email beacause I am still so newbish *arg!* :P
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