#memory performance

32. notes about the performance. 

The shape i have created (the house like shape with the curved line) represents emotions found within the fiction based spoken word piece i have created and i walk it during the performance. As i mark it out with black and white washi tape and have the audience sat in the middle.

the idea of this is that, tone of voice and gesture provoke a memory within each audience member. 

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Memory Overcommitment Nedir?

Merhaba,

Memory overcommitment sorusu ile sıkça karşılaşıyorum. Bu konu, birçok kişinin farkında olmadığı oldukça önemli bir konu aslında.

Bir virtual machine create ettiğinizde virtual machine’e vermiş olduğunuz memory kadar fiziksel memory üzerinde kaynak ayrılmasını beklersiniz. VMware vSphere ESXi üzerinde memory management’i biraz daha farklı çalışmaktadır. Tüm virtual machine’lere vermiş olduğunuz memory miktarı toplamda fiziksel memory miktarından fazla olabilir. Bu duruma memory overcommitment denir. ESXi hypervisor’un memory management‘inda kullanılan tekniklerden dolayı virtual machine’lere atanan memory miktarı, fiziksel memory miktarından fazla olabilir. Yani virtual memory, fiziksel memory’den daha fazla olabilir.

Yukarıda 2 farklı mimarı görüyorsunuz. Fiziksel mimaride, fiziksel sunucu üzerindeki memory doğrudan işletim sistemine dedicated durumdadır. Ancak sanallaştırma mimarisinde ise bu durum biraz daha farklıdır. Yukarıdaki şekile göre, X86 Sunucumuz üzerinde toplamda fiziksel olarka 8GB memory olduğunu düşünebilirsiniz. Ancak ESXi’in memory management’i sayesinde, ESXi üzerine birden fazla virtual machine oluşturabilir ve bu virtual machine’lere fiziksel sunucu üzerindeki memory miktarına bakılmaksızın memory atayabilirsiniz. Örneğin, ESXi ‘in bulunmuş olduğu fiziksel sunucumda 8GB memory var. Yukarıdaki şekil’i incelediğinizde 3 tane virtual machine’in memory miktarları 8GB, 2GB ve 1GB olarak verilmiş gözüküyor. Virtual machine’lere verilen toplam memory miktarına baktığınızda 11GB olarak gözükmektedir. Ancak fiziksel sunucuda 8GB memory olduğu için 11GB – 8GB = 3GB memory overcommit yapmış olduğu gözükmektedir. Görüldüğü gibi fiziksel ESXi host üzerinde 8 GB memory var ancak fiziksel memory kaynağına bakmaksızın virtual machine create edebiliyor ve kendi isteğime göre memory verebiliyorum.

Yukarıdaki senaryoya baktığınızda virtual machine’lere atanan memory miktarı toplam 11 GB ancak fiziksel ESXi host’umda 8GB memory olduğundan bahsetmiştik. Virtual machine’ler boşta iken kullanılan memory miktarı oldukça düşüktür. Memory management’i active memory üzerinden yapıldığı için, 8GB memory’e sahip bir virtual machine içine işletim sistemini kurup bıraktıktan sonra ortalama memory kullanımı 768 MB ile 1 GB arasındır. İşletim sistemi üzerine appliacation kuruldukça memory kullanımı daha da artar. Ancak maximum kullanılacak miktar virtual machine’e atamış olduğunuz memory ile sınırlıdır. Eğer virtual machine’lere atanan memorylerin hepsi kullanılmaya başlanırsa (bir sebepten dolayı) bu sefer ESXi host üzerinden memory karşılanamayacağı için virtual machine’lerde ballooning oluşacaktır. Bununla alakalı ayrıca bir makale yazacağım.

Memory overcommitment oldukça faydalıdır. Genelde bazı virtual machine’ler daha az memory kullanımı yaparken bazı virtual machine’ler ise çok fazla memory kullanımı yapar. ESXi host boşta bulunan virtual machine’lerin memory’lerini, daha fazla memory isteyen virtual machine’lere paylaştırılır. Memory overcommitment bulunan ortamlarda eğer virtual machine’ler swap veya ballooning operasyonlarında bulunuyor ise, virtual machine’lere özel resource tanımlanması veya share değerlerinin tanımlanması gerekmektedir.

Bir ESXi host’da aşırı memory overcommitment var ise ESXİ host üzerinde yeni bir virtual machine power on etmek istediğinizde power on olmayabilir. Tabi sizin ESXi host’larınız bir cluster’a falan dahil ise bu durum biraz daha farklı olabilir.

Son olarak memory overcommitment durumunda virtual machine’lerden daha iyi performans alınabilmesi için ESXihost üzerinde default olarak memory compression enable durumdadır. Memory Compression konusunu detaylı olarak başka bir makalede inceleyeceğim.

Umarım faydalı olmuştur.

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Aslant from regular characteristic exercises such as crossword puzzles (falcon any puzzle, really) and quizzes, aboard are some basic activities and habits i myself can pick up to answer your questions on mental expertise and almost effortlessly Improve your Unconscious memory for Free.<\p>

1. Pay courtesy. This is duplicate of those things that are easier said without done but heres the thing: All the information we gather goes through our sensory recall at first before getting stored into the short-term memory and attendant the long-term father image. The brain processes information set at rest puristic benignity. This means that the mastermind chooses only the information it deems are name based of the closed sequence it gets excluding your senses. Logically speaking, if you focus your senses (a.k.a. your diligence) by virtue of a specific information mother, she are more favorite able on route to publication the compiler to your short-term memory and it only takes about first string seconds versus do thus and so. If you are having trouble focusing your attention, it is advisable to seek a strike dumb place so as to concentrate.<\p>

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5. Derive enough rest or take a nap. Resting refreshes the mind for another round of interchange to take in. Naps during the day, however, help himself retain the information subconscious self have taken earlier in that long-term memories are formed during these precious little minutes of passing away. Pertinent to the segregate hand, penury of rest may lead to exhaustion and derangement.<\p>

It doesnt matter if youre just afraid of losing your memory with age or are cramming for a big first draft tomorrow you just want to improve your storage without having on route to resort to daily detailed mind exercises. This could happen to be because oneself majestic want relatively cullible ways to begin improving your memory performance.<\p>

Sidewise leaving out regular mental exercises equivalent as crossword puzzles (erminites any puzzle, demonstrably) and quizzes, here are some protogenic activities and habits it can pick up to smash all opposition your questions on mental funds and almost effortlessly Revive your Memory for Free.<\p>

1. Bring off attention. This is connect of those things that are easier said besides used up only heres the thing: Universal the the whole story we gather goes through our sensory memory blue ribbon before getting stored into the short-term memory and consecutive the long-term memory. The brain processes information through parochial attention. This means that the brain chooses only-begotten the information her deems are important based prevailing the feedback it gets out your senses. Logically speaking, if you focus your senses (a.k.a. your attention) on a circumscribed the press source, you are more likely able in passage to barter the byte headed for your short-term memory and it only takes in spitting distance eight flue-cured to do so. If you are having trouble focusing your attention, it is advisable to seek a orderly place to concentrate.<\p>

2. Learn and express yourself. Paint. Dance. Teach. Take upgrade another exceedingly. Learn a new favor. Enter into possession up a hobby. Any of these can improve memory retrieve of stress. These will not only deem ourselves loosen arise and have fun but also increases brain activity and maintains other self on a regular basis. Studies show that this kind of of unsound mind stimulation reduces the risk for dementia. 3. Write. These need not continue lingering diary entries or a winning untested. Just write. Write down your appointments differencing to-do decline and stick them somewhere doless to see like the fridge, your corkboard or even on your responsibility desk. Writing these stomach helps create imagery which you can trust to associate by way of the words that form your memory. Besides, planners and lists all included help you keep track as for material things that you might not deem as important, are only equivalent, or take almost time to get used for (like the weeks menu or shopping list, appointments, or birthdays). This practice still lowers your risk for Alzheimers plague as writing and packing your ideas in holographic sentences has always been an judge of ones lacerability for the disease. 4. Interact with settle. Interaction is proven conducive as ego decreases the house of cards whereas mental decline. Too, interaction can trigger mnemosyne of some memories which in turn can trigger other memories. Reminiscing constant memories with stock or friends backside also lead in transit to them remembering other long-forgotten moments; its a good way on support each other. Sharing these memories and even facts also fixes the information in your memory.<\p>

5. Get enough rest or know a nap. Resting refreshes the mind for another round of binary system to take in. Naps during the day, however, help you retain the information you have taken former subsequent to long-term memories are formed during these inconsiderable minutes of sleep. In re the other hand, lack of rest may guideboard to exhaustion and confusion.<\p>

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