BibSonomy bookmarks for /user/jil/performance

Document usage of DISABLE_OOB to work around Docker proxy bug · Issue #43 · gvenzl/oci-oracle-xe · GitHub

jil — 2024-12-10T14:14:18+01:00

BREAK_POLL_SKIP=10000 DISABLE_OOB=ON

The best UUID type for a database Primary Key - Vlad Mihalcea

jil — 2023-10-09T13:38:11+02:00

If you plan to store UUID values in a Primary Key column, then you are better off using a TSID (time-sorted unique identifier). One such implementation is offered by the Hypersistence TSID OSS library, which provides a 64-bit TSID that’s made of two parts: a 42-bit time component a 22-bit random component The random component has two parts: a node identifier (0 to 20 bits) a counter (2 to 22 bits) The node identifier can be provided by the tsid.node system property when bootstrapping the application: -Dtsid.node="12"

Waiting for PostgreSQL 11 – Fast ALTER TABLE ADD COLUMN with a non-NULL default – select * from depesz;

jil — 2022-04-22T10:19:18+02:00

Currently adding a column to a table with a non-NULL default results in a rewrite of the table. For large tables this can be both expensive and disruptive. This patch removes the need for the rewrite as long as the default value is not volatile. The default expression is evaluated at the time of the ALTER TABLE and the result stored in a new column (attmissingval) in pg_attribute, and a new column (atthasmissing) is set to true. Any existing row when fetched will be supplied with the attmissingval. New rows will have the supplied value or the default and so will never need the attmissingval.

Key/Value Pair versus hstore - Benchmark_of_KVP_vs._hstore_-_doc.pdf

jil — 2020-10-15T10:32:54+02:00

https://wiki.hsr.ch/Datenbanken/files/Benchmark_of_KVP_vs._hstore_-_doc.pdf

lambda - Understanding Java 8 Streams at the Bytecode Level - Stack Overflow

jil — 2020-04-01T11:27:52+02:00

https://stackoverflow.com/questions/32166193/understanding-java-8-streams-at-the-bytecode-level

performance - Java lambdas 20 times slower than anonymous classes - Stack Overflow

jil — 2019-07-22T10:10:50+02:00

when the application hasn’t used lambda expressions before, even the framework for generating the lambda classes has to be loaded (Oracle’s current implementation uses ASM under the hood). This is the actual cause of the slowdown, loading and initialization of a dozen internally used classes, not the lambda expression itself.

ab - Apache HTTP server benchmarking tool - Apache HTTP Server Version 2.4

jil — 2018-07-04T17:31:48+02:00

https://httpd.apache.org/docs/2.4/programs/ab.html

7 Tips to Speed Up Eclipse | Personal Registry Editor

jil — 2018-03-23T11:31:10+01:00

http://www.nicolasbize.com/blog/7-tips-to-speed-up-eclipse/

About Pool Sizing · brettwooldridge/HikariCP Wiki · GitHub

jil — 2018-03-23T10:31:53+01:00

If you have 10,000 front-end users, having a connection pool of 10,000 would be shear insanity. 1000 still horrible. Even 100 connections, overkill. You want a small pool of a few dozen connections at most, and you want the rest of the application threads blocked on the pool awaiting connections. imagine three threads (Tn=3), each of which requires four connections to perform some task (Cm=4). The pool size required to ensure that deadlock is never possible is: pool size = 3 x (4 - 1) + 1 = 10

Synopsis of open source instruments for backups | BitCalm

jil — 2015-10-23T16:50:20+02:00

https://bitcalm.com/blog/synopsis-of-open-source-instruments-for-backups/

Java tip: How to read files quickly | Nadeau Software

jil — 2015-08-04T19:22:36+02:00

http://nadeausoftware.com/articles/2008/02/java_tip_how_read_files_quickly

InformIT: Tomcat Kick Start: Basic Principles of Web Servers > Persistent Connections

jil — 2010-01-13T18:06:31+01:00

http://www.informit.com/articles/article.aspx?p=31443&seqNum=9

Evaluation of text classification

jil — 2008-02-19T19:22:57+01:00

http://nlp.stanford.edu/IR-book/html/htmledition/evaluation-of-text-classification-1.html

High Performance Enabled SSH/SCP [PSC]

jil — 2007-04-10T17:24:14+02:00

http://www.psc.edu/networking/projects/hpn-ssh/theory.php

M-Box Performance

jil — 2007-04-10T12:58:23+02:00

http://www.isode.com/whitepapers/mbox-benchmark.html