A Memory - Adaptive Sort ( MASORT ) for Database

نویسنده

  • Weiye Zhang
چکیده

A memory-adaptive sort is able to dynamically change the amount of memory used during sorting. The method described in this paper adjusts memory usage according to input size and memory requirements of other sorts running in a database system. It saves memory space for small sorts, reduces sort time for large sorts, and balances memory usage among concurrent sorts. Overall system performance is improved when several sorts are running concurrently .

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

A memory-adaptive sort (MASORT) for database systems

A memory-adaptive sort is able to dynamically change the amount of memory used during sorting. The method described in this paper adjusts memory usage according to input size and memory requirements of other sorts running in a database system. It saves memory space for small sorts, reduces sort time for large sorts, and balances memory usage among concurrent sorts. Overall system performance is...

متن کامل

SQL Memory Management in Oracle9i

Complex database queries require the use of memory-intensive operators like sort and hashjoin. Those operators need memory, also referred to as SQL memory, to process their input data. For example, a sort operator uses a work area to perform the in-memory sort of a set of rows. The amount of memory allocated by these operators greatly affects their performance. However, there is only a finite a...

متن کامل

A limited memory adaptive trust-region approach for large-scale unconstrained optimization

This study concerns with a trust-region-based method for solving unconstrained optimization problems. The approach takes the advantages of the compact limited memory BFGS updating formula together with an appropriate adaptive radius strategy. In our approach, the adaptive technique leads us to decrease the number of subproblems solving, while utilizing the structure of limited memory quasi-Newt...

متن کامل

Adaptive Steffensen-like Methods with Memory for Solving Nonlinear Equations with the Highest Possible Efficiency Indices

The primary goal of this work is to introduce two adaptive Steffensen-like methods with memory of the highest efficiency indices. In the existing methods, to improve the convergence order applied to memory concept, the focus has only been on the current and previous iteration. However, it is possible to improve the accelerators. Therefore, we achieve superior convergence orders and obtain as hi...

متن کامل

Memory-Adaptive External Sorting

In real-time and goal-oriented database systems, the amount of memory assigned to queries that sort or join large relations may fluctuate due to contention from other higher-priority transactions. This study focuses on techniques that enable external sorts both to reduce their buffer usage when they lose memory, and to effectively utilize any additional buffers that are given to them. We also s...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 1996