Remove c
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Faster remainders when the divisor is a constant: beating compilers and libdivide

Daniel Lemire

Of course, if d is not a power of two, 2 N / d cannot be represented as an integer. I believe that all optimizing C/C++ compilers know how to pull this trick and it is generally beneficial irrespective of the processor’s architecture. uint64_t lowbits = c * n ; return ( ( __uint128_t ) lowbits * d ) > > 64 ; }.

C++ 279
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PostgreSQL Connection Pooling: Part 4 – PgBouncer vs. Pgpool-II

Scalegrid

In our final post, we will put them head-to-head in a detailed feature comparison and compare the results of PgBouncer vs. Pgpool-II performance for your PostgreSQL hosting ! Performance Testing. All of the PostgreSQL benchmark tests were run under the following conditions: Initialized pgbench using a scale factor of 100.

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HammerDB v4.8 New Features : Viewing your Benchmark results with the HammerDB Web Service

HammerDB

Turning Jobs Off and On Of course one of the most important aspects is to be able to disable the functionality. Copyright (C) 2003-2023 Steve Shaw Type "help" for a list of commands Initialized new Jobs on-disk database /opt/HammerDB-4.8/DATA/hammer.db On Windows it will look for TEMP, TMP, TMPDIR or finally C: for example, on Linux.

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PostgreSQL Performance Tuning: Optimizing Database Parameters for Maximum Efficiency

Percona

In this blog post, we will delve into the world of PostgreSQL performance tuning and establish some basic guidelines for setting database parameters to enhance the performance of your PostgreSQL database, based on the workload. What is PostgreSQL performance tuning? Why is PostgreSQL performance tuning important?

Tuning 52
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CheriABI: enforcing valid pointer provenance and minimizing pointer privilege in the POSIX C run-time environment

The Morning Paper

CheriABI: enforcing valid pointer provenance and minimizing pointer privilege in the POSIX C run-time environment Davis et al., That ‘reasonable’ performance cost is a 6.8% And this all has to work for whole-system executions, not just the C-language portion of user processes. ASPLOS’19. CHERI implementation.

C++ 61
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What programming languages does HammerDB use and why does it matter?

HammerDB

HammerDB is a load testing and benchmarking application for relational databases. On high-performance multi-core systems all the supported databases can return performance in the many millions of transactions per minute. Basic Benchmarking Concepts. To benchmark a database we introduce the concept of a Virtual User.

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A MyRocks Use Case

Percona

The use case is the TPC-C benchmark but executed not on a high-end server but on a lower-spec virtual machine that is I/O limited like for example, with AWS EBS volumes. The storage device has performance characteristics pretty similar to an AWS gp2 EBS volume of about 330 GB in size. TPC-C on MyRocks.

Storage 56