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Ballooning

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memory overcommit

A technique that increases the amount of memory available in a virtual machine environment. Two popular approaches are memory ballooning and kernel same-page merging.

Memory Ballooning
This method allocates unused memory (RAM) from one virtual machine (VM) to another. The term symbolizes an "inflated" balloon temporarily residing in the memory of the VM it was taken from, making that memory unavailable. When the use of that memory is returned to the VM, the balloon is "deflated."

Kernel Same-Page Merging (KSM)
When active memory pages with duplicate content are found, they are merged into one and marked read-only. If an application modifies a merged page, a copy-on-write (CoW) page is created. See copy-on-write and virtual machine.
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Ballooning

See also Aviation.
Balloon Hoax, The
1844 news story falsely reports that eight men have crossed the Atlantic in a balloon. [Am. Lit.: The Balloon Hoax in Poe]
Ferguson, Samuel
embarks with two others on air-borne journey over Africa. [Fr. Lit.: Five Weeks in a Balloon]
Wizard of Oz
reaches and departs from Oz in circus balloon. [Children’s Lit.: The Wonderful Wizard of Oz]
Allusions—Cultural, Literary, Biblical, and Historical: A Thematic Dictionary. Copyright 2008 The Gale Group, Inc. All rights reserved.
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References in periodicals archive
The patients were called two weeks after the procedure for follow up.During follow up detailed echocardiogram was done for adequecy of ballooning and any complication.
BALLOON PULMONARY VALVULOPLASTY IN ISOLATED PULMONARY VALVE STENOSIS VERSUS DYSPLASTIC PULMONARY VALVE IN CHILDREN PRESENTING LATE WITH RV DYSFUNCTION AND ARRYTHMIA
The real "sport" of hot air and gas ballooning is in the competition.
Interpreting ballooning
HISTORY: Research to create a historic time line on how ballooning began and how it has changed over time.
Lift off! Taking to the skies with helium balloons
Ian Bentley, of Birmingham Balloons and Innovation Ballooning, said the basket meant the firm would now be able to accept special-day applications for balloon flights from anyone in any type of wheelchair for the first time.
Sky's the limit as Stephen Hawking donates basket
He was a down-to-earth estate agent for 20 years before catching the hot-air ballooning bug.
Mirror Works: Inflation got my firm off ground; BALLOONING'S BOOMING
Ballooning provided man his first reach above the surface of the planet in 1783 with a short flight by France's Montgolfier brothers.
At Home in the Sky
As the balloon continued its ascent and the people on the ground got smaller, I began to experience the thrill of ballooning. The weather that had been so ominous the day before was perfect.
Up, up and away
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