Yes, they do require the machine code and all memory operands. Shouldn’t the CPU access the memory pages sequentially, i.e. first read the instruction and then access the memory operand? Yes that’s logically what happens, but a page-fault exception interrupts that 2-step process and discards any progress. The CPU doesn’t have any way to remember … Read more
Below code should do it. I am using in my own project and tested for most cases. usage: Pageable pageable = new OffsetBasedPageRequest(offset, limit); return this.dataServices.findAllInclusive(pageable); and the source code: import org.apache.commons.lang3.builder.EqualsBuilder; import org.apache.commons.lang3.builder.HashCodeBuilder; import org.apache.commons.lang3.builder.ToStringBuilder; import org.springframework.data.domain.AbstractPageRequest; import org.springframework.data.domain.Pageable; import org.springframework.data.domain.Sort; import java.io.Serializable; /** * Created by Ergin **/ public class OffsetBasedPageRequest implements Pageable, … Read more
You can achieve the desired result by requesting a list of distinct ids instead of a list of distinct hydrated objects. Simply add this to your criteria: criteria.setProjection(Projections.distinct(Projections.property(“id”))); Now you’ll get the correct number of results according to your row-based limiting. The reason this works is because the projection will perform the distinctness check as … Read more
Using skip+limit is not a good way to do paging when performance is an issue, or with large collections; it will get slower and slower as you increase the page number. Using skip requires the server to walk though all the documents (or index values) from 0 to the offset (skip) value. It is much … Read more
Version of this answer with a nice TOC and more content. I will correct any error reported. If you want to make large modifications or add a missing aspect, make them on your own answers to get well deserved rep. Minor edits can be merged directly in. Sample code Minimal example: https://github.com/cirosantilli/x86-bare-metal-examples/blob/5c672f73884a487414b3e21bd9e579c67cd77621/paging.S Like everything else … Read more
I encountered some performance issues using the COUNT() OVER() method. (I’m not sure if it was the server as it took 40 seconds to return 10 records and then later didn’t have any issues.) This technique worked under all conditions without having to use COUNT() OVER() and accomplishes the same thing: DECLARE @PageSize INT = … Read more
You’re looking for the Skip and Take extension methods. Skip moves past the first N elements in the result, returning the remainder; Take returns the first N elements in the result, dropping any remaining elements. See MSDN for more information on how to use these methods: http://msdn.microsoft.com/en-us/library/bb386988.aspx Assuming you are already taking into account that … Read more