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Old 02-16-2010, 10:53 AM   #1
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Posts: 2
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Join Date: Feb 2010
Device: PC
Slow -- excessive cpu utilization

Hey All,

I'm new to the forums and to calibre as well, having just installed it yesterday. Since then, i've been having trouble with excessive cpu utilization every time I use the application.

For instance, importing arouind one hundred files, (including pdfs, docs, rtf and lits) took over an hour and the cpu usage was at max during this entire time.

Also if i just click from one title to another it can utilize anywhere from 60-90% of my cpu, scrolling does the same.

Is it normal that it is this sluggish? and a cpu hog? From the lack of many post concerning this problem i'd have to think no. So i'm wondering if it is something to do with my computer config.

To that extent, i've disabled my Anti-virus (Avast) and killed all non-essential processes running and tried calibre, but its the same problem. (I never have any indexing programs running without consent.)

I've noticed that the mem usage can reach ~500,000k, which is half of my total physical mem, when the app window is selected. Currently it is over 200,000k and it hasn't been the selected app for at least 10 minutes.

In general the app runs sluggish and is not very responsive, i assume it is due to the cpu issue.

As for drivers, i keep them pretty up to date. For instance, i can play Dragons Age with no video or sound issues.

Does anyone have a solution or a suggestion? It would be appreciated as this app, aside from the problem i'm having, seems to be pretty nice, and would be immensely useful if it operated correctly.

My system specs are listed below:



Operating System Microsoft Windows XP Professional
OS Service Pack Service Pack 3
DirectX (DirectX 9.0c)
Computer Name ******
User Name ******

CPU Type AMD Athlon 64, 2000 MHz (10 x 200) 3000+
Motherboard Name ECS 755-A2 (5 PCI, 1 AGP, 1 CNR, 2 DDR DIMM, Audio, LAN)
Motherboard Chipset SiS 755, AMD Hammer
System Memory 1024 MB (PC3200 DDR SDRAM)
BIOS Type Award (09/16/05)
Communication Port Communications Port (COM1)
Communication Port ECP Printer Port (LPT1)

Video Adapter NVIDIA GeForce 7600 GS (Omega 2.169.21) (512 MB)
Monitor Plug and Play Monitor [NoDB] (L74090383840)

Audio Adapter SiS 7012 Audio Device

IDE Controller SiS PCI IDE Controller
IDE Controller Standard Dual Channel PCI IDE Controller
SCSI/RAID Controller ASU7C78W IDE Controller
Disk Drive Maxtor 6Y080L0 (80 GB, 7200 RPM, Ultra-ATA/133)
Disk Drive Maxtor 6L200M0 (200 GB, 7200 RPM, SATA)
Disk Drive ST310005 20AS USB Device (931 GB, USB)
Optical Drive DVDRW IDE1108 (DVD+RW:8x/4x, DVD-RW:8x/4x, DVD-ROM:12x, CD:40x/24x/40x DVD+RW/DVD-RW)
SMART Hard Disks Status OK

C: (NTFS) 130002 MB (106170 MB free)
D: (NTFS) 49999 MB (31922 MB free)
E: (NTFS) 78159 MB (36109 MB free)
G: (NTFS) 953867 MB (522956 MB free)
Total Size 1183.6 GB (680.8 GB free)

Keyboard HID Keyboard Device
Mouse HID-compliant mouse

Network Adapter SiS 900-Based PCI Fast Ethernet Adapter (

Printer Lexmark 3100 Series
Printer Microsoft XPS Document Writer
USB1 Controller SiS 7001 PCI-USB Open Host Controller
USB1 Controller SiS 7001 PCI-USB Open Host Controller
USB1 Controller SiS 7001 PCI-USB Open Host Controller
USB2 Controller SiS 7002 USB 2.0 Enhanced Host Controller
USB Device Generic USB Hub
USB Device Lexmark 3100 Series
USB Device USB Composite Device
USB Device USB Human Interface Device
USB Device USB Human Interface Device
USB Device USB Human Interface Device
USB Device USB Mass Storage Device
USB Device USB Printing Support
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