|
|
paged ==>
paging
<operating system> A technique for increasing the memory space
available by moving infrequently-used parts of a program's
working memory from RAM to a secondary storage medium,
usually disk. The unit of transfer is called a page.
A memory management unit (MMU) monitors accesses to memory
and splits each address into a page number (the most
significant bits) and an offset within that page (the lower
bits). It then looks up the page number in its page table.
The page may be marked as paged in or paged out. If it is
paged in then the memory access can proceed after translating
the virtual address to a physical address. If the
requested page is paged out then space must be made for it by
paging out some other page, i.e. copying it to disk. The
requested page is then located on the area of the disk
allocated for "swap space" and is read back into RAM. The
page table is updated to indicate that the page is paged in
and its physical address recorded.
The MMU also records whether a page has been modified since it
was last paged in. If it has not been modified then there is
no need to copy it back to disk and the space can be reused
immediately.
Paging allows the total memory requirements of all running
tasks (possibly just one) to exceed the amount of physical
memory, whereas swapping simply allows multiple processes
to run concurrently, so long as each process on its own fits
within physical memory.
(1996-11-22)
Try this search on OneLook / Google
Nearby terms:
Page Mode Dynamic Random Access Memory « page out « pager « paging » PaiLisp » pain in the net » Paintbrush
This article was derived from the Free Online Dictionary of Computers and is available under ther terms of the GNU Free Documentation License.
Seagate 250GB 7200RPM 8MB SATA HDDSeagate 250GB 7200RPM 8MB SATA HDD ** Seagate 250GB 7200RPM 8MB SATA HDD **This Seagate Serial ATA hard drive hasfeatures that are ideal for next-generation computers and low-end enterprise storage. Users benefit from a data transfer rate of 150 MB/s and an improved cabling that enables greater system design flexibility. Add 250 GB of storage capacityto a PC with this Seagate SATA hard drive!General Features:- 250 GB formatted capacity- 7200 RPM spindle speed- SATA interface- 8 MB buffer- 8 ms average seek time- 4.16 ms average latencyRegulatory Marks- UL- CE- C-Tick- CSA- BSMI- RWTUV- ek MarkNotes:- Drive only- Model: ST3250823AS- P/N: 9Y7383-301 Compatibility/Requirements/Disclosures: ** Requirements *** SATA controller* SATA cable* Available 3.5-inch drive bay* Available power connector More ...
NEC 4+1 Port USB2.0 PCI Contoller CardNEC 4+1 Port USB2.0 PCI Contoller Card ** NEC 4+1 Port USB 2.0 PCI Controller Card **Add fast USB 2.0 connectivity to any computer with this 4+1 port controller card. Featuring the NEC D720100AGM chipset, this card features a PCI interface with four USB external ports and one USB internal port!General Features:- NEC D720100AGM chipset- 32-bit PCI interface- USB 2.0 compliant- 480 Mbps maximum data transfer rate- Plug and Play- Four (4) external USB 2.0 ports- One (1) internal USB 2.0 portRegulatory Approvals:- FCC- CERetail Package Includes:- USB 2.0 controller card- Manual- Driver & Utilities CD (3-inch type)Notes:- P/N: SD-V2-5U- USB cable not included Compatibility/Requirements/Disclosures:** Requirements *** Microsoft Windows 98/98SE/2000/ME/XP* Available PCI slot* CD-ROM drive More ...
Super Mini Remote Control Submarine - 49MHz (Blue)Super Mini Remote Control Submarine - 49MHz (Blue) ** Super Mini Blue Remote Control Submarine - 49 MHz **Enjoy thrilling underwater adventures with this miniature remote control submarine! It glides through water gracefully and almost silently providing non-stop entertainment! It features include a front headlight for underwater search mission, dual propellers, and full function remote control! Also included are ball bearings to adjust the submergence and buoyancy capacity of the submarine! As a plus, it can run for over two hours on one AAA battery! It's perfect for all age groups and makes a great gift!Get going with your own mini underwater adventure with this mini remote control submarine!General Features:- Blue color- 49 MHz frequency- Up to 9.5-foot (approximate) operating range- Full function remote control- LED on nose of submarine lights the way- Dual propellers- High-speed dive control- Up to 150 minutes operation time- Submarine uses one AAA battery (included)- Remote control uses two AAA batteries (included)Unit Dimensions:- 1.5 x 2.5 x 3-inches(H x W x D, submarine only)- 16 x 3.25 x 1.25-inches (H x W x D, remote contol with extended antenna)Retail Package Includes:- Submarine- Remote control- User's manual- Antenna- Lead Balls for buoyancy control- Two (2) AAA batteries (for remote)- One (1) AAA battery (for submarine)Notes:- Not for use in salt water- Choking hazard, not for children under 3 years. In order to race, you must have submarines with remotes broadcasting at different frequencies. Compatibility/Requirements/Disclosures: ** Requirements *** Body of water (not salt water) More ...
Sandisk Memory Stick PRO 512MBSandisk Memory Stick PRO 512MB SanDisk's new Memory Stick PRO is the perfect solution for anyone who needs to capture and play back DVD-quality video in real time, or store CD-quality music, high-resolution digital images, and any other application that requires high performance, fast data transfer, large capacities and advanced security. •High-speed data transfer rate for DVD-quality video in real time•The fast transfer rates help prevent data loss when power is suddenly cut-off or if the media is removed accidentally •Advanced security with Access Control Function and MagicGate™technology More ...
Pocketware CPocketware C Robot Wars on your computer! Select vehicles in single or multiplayer mode and equip them with weapons, armor, and turbo boosters. Then enter the virtual arena and do some serious damage to those who challenge your supremacy. A full-version game on a pocket-size CD! Windows 95/98/ME/2000/XP More ...
Fellowes 150W DC/AC Mobile Power InverterFellowes 150W DC/AC Mobile Power Inverter ** Fellowes 150W DC/AC Mobile Power Inverter **With this Fellowes Mobile Power Inverter you canefficiently and reliably power a wide varietyof household AC products, simply plug into a12-Volt outlet in your car or boat! Power yourTV, computer, VCR's and more and when on the Go! Order yours today!General Features:- Turns Cigarette lighter into standard AC Plug- 150 watts of continuos power- Automatically shuts down if power levels areexceeded- 12Vdc- 15A Max.- Output: 115Vac , 60Hz- On/Off Switch- POWER LED- FAULT LEDRetail Package Includes:- Fellowes Mobile Power Inverter- ManualNotes:- Model: 99428 Compatibility/Requirements/Disclosures: ** Requirements *** Available 12-Volt Outlet More ...
|
