Planet PostgreSQL – Bruce Momjian: Clustering a Table

May 102021
 

Having written over 600 blog entries, I thought I would have already covered the complexities of the
CLUSTER command, but it seems I have not, so let’s do that now.

CLUSTER is an unusual SQL command because, like non-unique CREATE INDEX, it only affects performance. In fact,
CLUSTER requires the existence of an index. So, what does CLUSTER do? Well, what does CREATE INDEX do? Let’s look at how storage works in Postgres.

User data rows are stored in heap files in the file system, and those rows are stored in an indeterminate order. If the table is initially
loaded in INSERT/COPY order, later inserts, updates, and deletes will cause rows to be added in unpredictable order in the heap…

External feed Read More at the Source: https://postgr.es/p/54g

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World Socialist Web Site (en) – Israel kills 20 in Gaza, including children, as Netanyahu steps up provocations on Jerusalem Day

May 102021
 

Earlier in the morning, 1,000 security forces stormed the al-Aqsa Mosque compound in East Jerusalem as worshippers were praying, firing stun grenades, tear gas and rubber bullets, while snipers took up positions on rooftops, injuring more than 330 Palestinians.

External feed Read More at the Source: http://www.wsws.org/en/articles/2021/05/11/isra-m11.html

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Techdirt. – Twitch Takes Steps To Make It Even Easier To Issue DMCA Strikes Against Streamers

May 102021
 

If you’ve been following along with us, the past several months haven’t gone great for streaming platform Twitch. It all started with Twitch’s decision to simply nuke a bunch of streamer content as a result of a massive influx of DMCA notices it received. While Twitch streamers and some in the public went ballistic over this, the company decided to try to distract the world with bright shiny objects like emojis, only to continue to let the DMCApocalypse continue even after it apologized for its lack of transparency. Then Amazon, which owns Twitch, put on Twitch’s GlitchCon and spent a pretty penny on it, while streamers on the platform wondered why Amazon didn’t just spend that…

External feed Read More at the Source: https://www.techdirt.com/articles/20210505/11421146738/twitch-takes-steps-to-make-it-even-easier-to-issue-dmca-strikes-against-streamers.shtml

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