Crossword clues for bottleneck
bottleneck
- Jam producer
- A narrowing that reduces the flow through a channel
- Tunnel entrance at rush hour
- Common result of a lane closing
- Expressions of courage and audacity in a jam
- Where traffic is squeezed
- It causes delay in engagement, but nothing replaces a kiss
- Jugular nerve out of order, a constriction
- Traffic jam
Longman Dictionary of Contemporary English
The Collaborative International Dictionary
bottleneck \bottleneck\ v. t. same as obstruct; as, his laziness has bottlenecked our efforts to reform the system.
bottleneck \bottleneck\ v. i. to become narrower as one approaches a point; -- said of roads; as, right by the bridge, the road bottlenecks.
Douglas Harper's Etymology Dictionary
Wiktionary
n. 1 The narrow portion that forms the pouring spout of a bottle; the neck of a bottle. 2 In traffic, any narrowing of the road, especially resulting in a delay. 3 Any delay; part of a process that is too slow or cumbersome. vb. 1 (context transitive English) To slow by causing a bottleneck. 2 (context intransitive English) To form a bottleneck.
WordNet
n. a narrowing that reduces the flow through a channel [syn: constriction, chokepoint]
v. slow down or impede by creating an obstruction; "His laziness has bottlenecked our efforts to reform the system"
become narrow, like a bottleneck; "Right by the bridge, the road bottlenecks"
Wikipedia
In engineering, a bottleneck is a phenomenon by which the performance or capacity of an entire system is severely limited by a single component. The component is sometimes called a bottleneck point. The term is metaphorically derived from the neck of a bottle, where the flow speed of the liquid is limited by its neck.
Formally, a bottleneck lies on a system's critical path and provides the lowest throughput. Bottlenecks are usually avoided by system designers, also a great amount of effort is directed at locating and tuning them. Bottleneck may be for example a processor, a communication link, a data processing software, etc.
In a communication network, sometimes a max-min fairness of the network is desired, usually opposed to the basic first-come first-served policy. With max-min fairness, data flow between any two nodes is maximized, but only at the cost of more or equally expensive data flows. To put it another way, in case of network congestion any data flow is only impacted by smaller or equal flows.
In such context, a bottleneck link for a given data flow is a link that is fully utilized (is saturated) and of all the flows sharing this link, the given data flow achieves maximum data rate network-wide. Note that this definition is substantially different from a common meaning of a bottleneck. Also note, that this definition does not forbid a single link to be a bottleneck for multiple flows.
A data rate allocation is max-min fair if and only if a data flow between any two nodes has at least one bottleneck link.
In software engineering, a bottleneck occurs when the capacity of an application or a computer system is severely limited by a single component. The bottleneck has lowest throughput of all parts of the transaction path.
As such, system designers will try to avoid bottlenecks and direct effort towards locating and tuning existing bottlenecks. Some examples of possible engineering bottlenecks are: a processor, a communication link, disk IO, etc. Any system or application will hit a bottleneck if the work arrives at a sufficiently fast pace.
Tracking down bottlenecks (sometimes known as "hot spots" - sections of the code that execute most frequently - i.e. have the highest execution count) is called performance analysis. Reduction is usually achieved with the help of specialized tools, known as performance analyzers or profilers. The objective being to make those particular sections of code perform as fast as possible to improve overall algorithmic efficiency.
Bottleneck literally refers to the top narrow part of a bottle. In engineering, it refers to a phenomenon where the performance or capacity of an entire system is limited by a single or small number of components or resources.
Bottleneck may also refer to:
The Bottleneck is a location along the South-East Spur, known also as Abruzzi Spur— the most used route to the top of K2, the second-highest mountain in the world, in the Karakoram on the Pakistan/China border.
The Bottleneck is a narrow couloir, which is overhung by seracs from the ice field east of the summit. The couloir is located only 400m below the summit, and climbers have to traverse about 100m exposed to the seracs to pass it. Due to the height (8200m) and the steepness (50-60 degrees) this stretch is the most dangerous part of the route. According to AdventureStats, 13 out of the last 14 fatalities on K2 have occurred at or near the Bottleneck.
Despite all the dangers, the Bottleneck is still technically the easiest and the fastest route to the summit. Most climbers choose to use it to minimize time required to spend above 8,000 metres (the " death zone"). The standard route, the Abruzzi Spur (SE), as well as the Cesen route (SSE Ridge, which joins SE Ridge), and the American variety on the NE Ridge (traverse across E Face to SE Ridge), all attain the summit via the Bottleneck.
The climbers approaching the bottleneck start from a shoulder, an almost level ground just below 8,000 metres, where typically the highest camp is located. The bottom end of the couloir drops to the south face of the mountain, and it gradually steepens to 60 degrees just below the ice field. It is not possible to climb up the icefield, which rises straight up tens of metres, but one has to traverse leftwards at the bottom of the icefield 100 metres until it is possible to pass the icefield.
It is possible to bypass the Bottleneck by rock-climbing the cliffs on the left. However, due to the technical difficulty of this approach, it has only been done once, by Fritz Wiessner and Pasang Dawa Lama Sherpa in 1939.
On August 4, 2009, Dave Watson became the first person to ski down the Bottleneck.
In production and project management, a bottleneck is one process in a chain of processes, such that its limited capacity reduces the capacity of the whole chain. The result of having a bottleneck are stalls in production, supply overstock, pressure from customers and low employee morale. There are both short and long-term bottlenecks. Short-term bottlenecks are temporary and are not normally a significant problem. An example of a short-term bottleneck would be a skilled employee taking a few days off. Long-term bottlenecks occur all the time and can cumulatively significantly slow down production. An example of a long-term bottleneck is when a machine is not efficient enough and as a result has a long queue.
An example is the lack of smelter and refinery supply which cause bottlenecks upstream.
Another example is in a surface-mount technology board assembly line with several pieces of equipment aligned. Usually the common sense is driven to set up and shift the bottleneck element towards the end of the process, inducing the better and faster machines to always keep the PCB supply flowing up, never allowing the slower ones to fully stop, a fact that would be heeded as a deleterious and significant overall drawback on the process.
Usage examples of "bottleneck".
A fresh battery could drive the little bulb day and night for four days and, if necessary, could be sent up, now that they had widened the bottleneck and double dihedron, to be recharged from the pedal-driven magneto that kept their telephone battery fresh.
Passing Sunset and Vine, traffic got bottlenecked: shitloads of cars turning north on Gower and Beachwood.
Light Horse regiments were called upon to take a position known as The Nek, a ridge about fifty yards wide at the Anzac front line and thirty yards or so at the Turkish trenches, so that any bayonet charge from our lines would have the effect of forcing troops into a bottleneck, concentrating their numbers for the Turkish machine guns and rifles.
In windbreaker and knickers he sticks fast to his bollard, he grinds, before attacking the bottle, goes on grinding the same song as soon as the bottleneck is released, and keeps on blunting his teeth.
Drunkenness to me was dragging Gatti Jinni up to his sad garret once a month, or watching Karsh wearily facing down some grinning bargeman with a meat-knife in one hand and a broken bottleneck in the other, with two farmers bleeding and vomiting on the floor.
It undeniably happens to be the case that these phenotypic effects have largely become bundled up into discrete vehicles, each with its genes disciplined and ordered by the prospect of a shared bottleneck of sperms or eggs funnelling them into the future.
In a room lit by a candle stuck in a bottleneck a slut combs out the tatts from the hair of a scrofulous child.
Unnerving, because Hel was now totally dependent on the cable, after ninety minutes of negotiating the narrow, twisting shaft with its bottlenecks, narrow ledges, tricky dihedrons, and tight passages down which he had to ease himself gingerly, never surrendering to gravity because the cable was slack to give him maneuvering freedom.
Street barricades were already going up here and there, causing unfortunate bottlenecks of desperate people.
The overflow shunts will direct the water straight down through the Bottleneck into the deepest storm drains and the Astor Tunnels, which in turn drain into the West Side Laterals and finally into the Hudson.
Something rippled out of the bottleneck, a force that shocked both of them.
Grant pointed the bottleneck of the harp in her direction and plucked frantically at the double-banked strings.
He stepped into Dome X, sweeping the bottleneck of the harp in short left-to-right arcs.
Pointing the bottleneck of the instrument at the rolling molecular destabilizer, he strummed the strings fast and hard.
If and when the Bottleneck does close completely, either as a result of nebular drift or through berserker actionwell, everyone on Alpine is going to be in a state of siege at best.