Edvards

Edvards

Um 18Uhr 12g geladen - Um 20Uhr ins Bett zwangseingewiesen - Um 6Uhr am Sozialer Konstruktionismus

Oh, , you're really out here thinking that banning will stop people from finding ways to lose their money. Meanwhile, just wants you to turn off your ad blocker so they can keep you updated on all the innovative ways people circumvent rules.

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NERDS #21 - Now with 100% Fewer F-Bombs

Show HN: Make cursed fonts like Times New Bastard (mitpit.com)

Today I succeeded in adding my flat and building address to my online local Council account. This seems utterly fundamental and yet it took several attempts on a few different days for me to understand what input was needed for their system to find the addresses linked to my post code. In the end, it was only my building number. Then I was offered a list of flats with their specific physical locations (first floor rear second floor front etc). Interesting encountering this semi-janky setup.

Digitale Woche gestartet: Wie Technologie Alltag und Wirtschaft verndertOffline, online, hybrid"

Am Montag startete die sechste Ausgabe der Digitalen Woche. Unter dem Leitthema Offline, online, hybrid" erffnete das Team von Smart City und der Stadt Osnabrck das mehrtgige Programm.#AyaJaff

HRC63 Side Event Beyond Settlement Goods: Third-State and Corporate Responsibilities in Relation to Israels Unlawful Occupation

Tuesday, SEP-29 12:00 13:00 CEST

Room V, Palais des Nations,

Organised by: The Independent Commission for Human Rights and Law for

Format: In-person event with live

Prime source Law for Palestine

Apotheken

MERCHANDISE

vs.

RE:

if you live in the and want some when using the then considering signing

Important for too, given recent attempts of parties to apply to e.g. regarding LGBTQ+ or regarding the sad situation of Palestinians, in recent memory.

Casinos online em Portugal: entenda as diferenas, os riscos e a polmica com influenciadores. A proliferao de plataformas de jogo de fortuna ou azar na internet tem gerado um debate crescente em Portugal, impulsionado pela promoo intensiva realizada por criadores de contedo e influenciadores digitais.

Improve your privacy:

Installment payments for major online purchases are growing increasingly popular in Germany. According to a survey conducted by the comparison portal Verivox, w...

Keine Moneypulation

Dein Himmel & Sonnestrahlen sind auch erkennbar. - Du darfst aber deine Bude nicht so vergammeln lassen u. solltest dich so langsam auch auf den Winter vorbereiten, solange die Sonne noch scheint.

feat. Putz
& ordenliche Winterschlfer Zelle

The article examines how personal hardship and online isolation relate to expressed support for white nationalism, based on national surveys and experimental descriptions of the movement. It also differentiates the impact of social and economic strain from local demographic changes in predicting endorsement.

This piece is of interest to psychology readers because it connects social stress, online social networks, and identity concepts to political attitudes, highlighting how personal experience and online environments can influence belief systems without relying on demographic shifts.

Article Title: Personal hardship and online isolation predict support for white nationalism

Link to PsyPost Article:

nationalism social networks hardship isolation attitudes communities ideologies opinion

Functional Programming in Lean, a free book on using Lean as a programming language

Fancy a pizza tonight How about ordering one online that you know will never arrive

As AI increases, its clear human intelligence is decreasing proportionally

Indians are discovering the thrill of shopping without paying

CVE Alert: CVE-2026-96602 - Abdurrab5 - online-makeup-store -

-2026-96602 -makeup-store

CVE Alert: CVE-2026-96601 - Abdurrab5 - online-makeup-store -

-2026-96601 -makeup-store

10 #284

...

Get everyone you know to watch this video. Stop thinking and conversing in extremes. The world is desperately lacking in nuance these days. Treating our opinions and interests like sports teams is killing your critical reasoning skills

Enabling data checksums is strongly recommended to detect corruption originating in the storage or I/O layer, which can silently lead to incorrect query results. Although PostgreSQL performs basic sanity checks on the page header without checksums, it does not cryptographically verify page contents. As a result, many types of silent corruption could go unnoticed and produce inaccurate query outcomes.

In PostgreSQL 18, data pages across database clusters include a checksum by default, which is verified each time a page is read from disk and recalculated when written. Since checksums are enabled for all databases in a cluster, this applies broadly. However, if you've upgraded from earlier versions, your databases likely lack checksums. You can add checksums using pgchecksums, but the database must be shut down, and it can be a time-consuming process.

PostgreSQL 19 will support enabling checksums online, allowing them to operate in the background while the application remains active, possibly with throttling to lessen workload impact. Here's an example.

Corruption with checksums

To set up a demonstration database without checksums, I initialized it using the --no-data-checksums option with initdb:

podman run -d --replace
-e POSTGRESPASSWORD=xxxxxxx
-e POSTGRESINITDBARGS="--no-data-checksums"
postgres:19beta3

I created a table with one row containing the 'Hello World!' text:

postgres=# create table hackme as select 'Hello World!' as value
CREATE TABLE

postgres=# select distinct value from hackme
value
--------------
Hello World!

(1 row)

I ensure the dirty page is written to and flushed from the shared buffers:

postgres=# checkpoint
CHECKPOINT

postgres=# create extension if not exists pgbuffercache
CREATE EXTENSION

postgres=# select * from pgbuffercacheevictall()
buffersevicted buffersflushed buffersskipped
-----------------+-----------------+-----------------
1200 0 0

(1 row)

There's no encryption in PostgreSQL, so the data is visible in the file:

postgres=# select currentsetting('datadirectory')'/'pgrelationfilepath('hackme'::regclass) as file
file
--------------------------------------------
/var/lib/postgresql/20/docker/base/5/16454

(1 row)

postgres=# gset

postgres=# setenv file :file

postgres=# ! cat -v $file tail -c 42

AAB XHello World!

postgres=#

With filesystem access, I can modify the data to simulate storage corruption:

postgres=# ! LCALL=C sed 's/World!/Hacker/g' $file > /tmp/corrupted.file && cat /tmp/corrupted.file > $file

postgres=# ! cat -v $file tail -c 42

AAB XHello Hacker

postgres=#

When PostgreSQL reads the file again, it doesn't detect that the page was modified outside the instance and displays corrupted data:

postgres=# select distinct value from hackme
value
--------------
Hello Hacker

(1 row)

This is a major problem. Data can be corrupted at any layer below the PostgreSQL instance, and this corruption goes undetected.

Enabling checksums online

Without stopping the instance, I enable checksums:

postgres=# show datachecksums
datachecksums
----------------
off

(1 row)

postgres=# select pgenabledatachecksums()
pgenabledatachecksums
--------------------------

(1 row)

The checksum process is in progress and you can track the updates:

postgres=# select * from pgstatprogressdatachecksums
pid datid datname phase databasestotal databasesdone relationstotal relationsdone blockstotal blocksdone
-----+-------+---------+----------+-----------------+----------------+-----------------+----------------+--------------+-------------
101 0 enabling

(1 row)

postgres=# show datachecksums
datachecksums
----------------
inprogress-on

(1 row)

Over time, the database is protected by checksums:

postgres=# select * from pgstatprogressdatachecksums
pid datid datname phase databasestotal databasesdone relationstotal relationsdone blockstotal blocksdone
-----+-------+---------+-------+-----------------+----------------+-----------------+----------------+--------------+-------------

(0 rows)

postgres=# show datachecksums
datachecksums
----------------
on

(1 row)

Checksums are enabled without any downtime.

Corruption with checksums

I do the same as before, flushing the shared buffers and modifying the file directly:

postgres=# select * from pgbuffercacheevictall()
buffersevicted buffersflushed buffersskipped
-----------------+-----------------+-----------------
991 0 0

(1 row)

postgres=# ! cat -v $file tail -c 42

AAB XHello Hacker

postgres=# ! LCALL=C sed 's/Hacker/Franck/g' $file > /tmp/corrupted.file && cat /tmp/corrupted.file > $file

postgres=# ! cat -v $file tail -c 42

AAB XHello Franck

Now that each page has a checksum, a read detects any corruption:

postgres=# select distinct value from hackme
ERROR: invalid page in block 0 of relation "base/5/16454"

You can now switch to a standby node or restore from a backup.

Detecting corruption early is crucial for successful recovery. pgbasebackup performs checksum verification:

! pgbasebackup -zFtar -D /var/tmp/backup

WARNING: checksum verification failed in file "./base/5/16388", block 0: calculated 764A but expected 163F
WARNING: file "./base/5/16388" has a total of 1 checksum verification failure
WARNING: 1 total checksum verification failure
pgbasebackup: error: checksum error occurred

If you back up your database with a tool that doesn't check backups, validate the restore test with pgchecksums --check.

Conclusion

Data checksums are vital for PostgreSQL, transforming silent storage issues into detectable errors for investigation and recovery. Without them, corrupted data may go unnoticed, as page-header checks can't detect arbitrary page changes.

Enable checksums during cluster setup. For existing clusters, online activation avoids maintenance but isn't zero-impact:

pgenabledatachecksums() and pgdisabledatachecksums() need superuser access and must run on the primary. Changes are propagated to standbys via WAL.
The operation uses two background-worker slots. Ensure maxworkerprocesses has enough headroom.
It waits for open transactions and temporary tables in all databases. Long sessions or tables can delay indefinitely.
Checksums are applied when enabling, but reads verify them only after final transition to on.
A crash or restart during inprogress-on requires restarting from scratch.
Standbys may need forced restart points, blocking WAL replay and causing lag, possibly stalling a primary. Reducing maxwalsize beforehand can mitigate this.

Checksums are best seen as part of a larger corruption-detection strategy: enable early, monitor transition, validate backups and replicas, and plan around transaction lifetimes and workload.

Acerta nos Factos um novo site que transforma polmicas do ministro Lus Neves num jogo arcade interativo. O site apresenta-se como uma stira direta aos recentes casos do ministro.

Bitte Hilfe bei stupid Facebook.
Knnt ihr bitte meine ehemalige Seite bei Facebook als Betrug oder Versto melden. Ich kenne die genauen Meldungen nicht.
Ich habe vor ber einem Jahr bei Facebook mein Konto und Seiten gelscht. Die Seite ist immer noch online.
Anscheinend kann man aber nur noch was machen, wenn man ein Konto oder FREUNDE bei Facebook hat. Siehe Foto.
Vielen Dank fr Eure Hilfe. Kurze Notiz, wenn ihr das gemacht habt wre super.

CVE Alert: CVE-2026-95924 - SourceCodester - Online Reviewer Management System -

-2026-95924 -reviewer-management-system

The vehicle subscription startup Autonomy is still banking on the appeal of EVs, despite adding gas-powered cars to its roster.

Nuevo Grupo de Apoyo Mutuo (GAM) para hombres gais y bisexuales que practican chemsex

Mircoles 14 de octubre
Online Toda la info:
Inscripcin: chemsexstopsida.org

Cardano Masuk Standar x402, Harga ADA Naik 4% dan Tembus Level Tertinggi 4Bulan

Tradingan - (ADA) resmi dengan pada 21 . ini membuka baru bagi dan buatan (#AI) untuk melakukan secara langsung menggunakan kripto ADA. Kabar tersebut langsung mendapat perhatian pasar kripto. Harga ADA dilaporkan bergerak positif dan naik

I felt cute

. I strongly suspect under-18s will manage to access in spite of all attempts to prevent them from doing so, notwithstanding. Adolescents are naturally curious about - if we don't want them to look at , we might try providing them with adequate in our !

Curso Gestin y Justificacin de Subvenciones , 19 octubre-23 noviembre 2026

Every academic transition in India brings a familiar cluster of questions. A student finishing secondary school might be trying to resolve stubborn difficulties in chemistry, while simultaneously evaluating whether to join a local weekend test batch. A few years later, the focus shifts to university prospectuses, degree specializations, and state or national entrance tests.
, , , Learning,

Morgen
CLC Lunch&Learn: Ich spreche, also lerne ich. Warum Conversational Learning mit KI die Zukunft des Corporate Trainings ist Corporate Learning Community

Last updated: 2026-09-25

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