Thrashing (computer science)

In computer science, thrashing occurs when a computer's virtual memory subsystem is in a constant state of paging, rapidly exchanging data in memory for data on disk, to the exclusion of most application-level processing. This causes the performance of the computer to degrade or collapse. The situation may continue indefinitely until the underlying cause is addressed. The term is also used for various similar phenomena, particularly movement between other levels of the memory hierarchy, where a process progresses slowly because significant time is being spent acquiring resources.

Overview

If a process does not have enough pages, thrashing is a high paging activity, and the page fault rate is high. This leads to low CPU utilization. In modern computers, thrashing may occur in the paging system (if there is not sufficient physical memory or the disk access time is overly long), or in the communications system (especially in conflicts over internal bus access), etc. Depending on the configuration and algorithms involved, the throughput and latency of a system may degrade by multiple orders of magnitude. Thrashing is a state in which the CPU performs 'productive' work less and 'swapping' more. The CPU is busy in swapping pages, so much that it can not respond to users' programs as much as required. Thrashing occurs when there are too many pages in memory, and each page refers to another page. The real memory shortens in capacity to have all the pages in it, so it uses 'virtual memory'. When each page in execution demands that page that is not currently in real memory (RAM) it places some pages on virtual memory and adjusts the required page on RAM. If the CPU is too busy in doing this task, thrashing occurs.

Regina

Regina (Latin for "queen") may refer to:

Places

Persons

Other uses

Regina (Monterrey Metro)

The Regina Station (Spanish: Estación Regina) is a station on Line 2 of the Monterrey Metro. It is located along Alfonso Reyes Avenue where it is intersected by Juan Sánchez Azcona street.

This station is three blocks away from the Monumental Monterrey (Monterrey's main Bullfighting ring) and across the street from the Coca-Cola bottler. Its logo represents the architecture of the station's entrance, and it is accessible for people with disabilities.

This station was inaugurated on October 31, 2007. It was part of the first stage of the Line 2 expansion (along with Niños Heroes Station and Universidad), being the only underground station of the Line 2 extension project.

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References

Regina (electoral district)

Regina was a federal electoral district in Saskatchewan, Canada, that was represented in the Canadian House of Commons from 1908 to 1935.

This riding was created in 1907 from parts of the former Northwest Territories ridings Assiniboia West and Qu'Appelle ridings. It initially consisted of a part of Saskatchewan stretching from the south boundary of the province.

The riding was abolished in 1933 when it was redistributed into Lake Centre, Qu'Appelle, and Regina City ridings.

Election results

By-election: On Mr. Motherwell's acceptance of an office of emolument under the Crown, 3 January 1922

By-election: On Mr. Darke's resignation, 20 February 1926 to create a vacancy for C.A. Dunning

By-election: On Mr. Dunning's acceptance of an office of emolument under the Crown, 5 October 1926

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External links

Traxx

Traxx may refer to

Traxx (film)

Traxx is a 1988 action/adventure comedy film that was directed by Jerome Gary. It released on August 17, 1988 and starred Shadoe Stevens as a mercenary turned cookie maker. The film had a budget of 6.5 million dollars and was initially intended to have a theatrical release, but was instead released direct to video.Traxx was later screened in 2012 at the Hollywood Theatre in Portland, Oregon.

Plot Summary

Opening in 1984, Traxx (Shadoe Stevens) is a Texas State Trooper who has little respect for the rules of the police force due to perps frequently getting away with their crimes through legal technicalities or playing the "temporary insanity" case in court. As a result, Traxx makes every effort possible to kill criminals after catching them in the act which earns him scorn from his superiors. In the opening scene, Traxx is one of several troopers called to defuse a hostage situation where a deranged holdup man (Leon Rippy) has taken refuge in a pet store after shooting and killing an old lady and a puppy. Traxx storms the store and when the killer gives up and vows to plead temporary insanity, Traxx shoots and kills him anyway. After being reprimanded one too many times by the police commissioner (Hugh Gillin) for excessive use of force, Traxx quits and leaves town to become a soldier of fortune.