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Hussein Nasser

@hnasr • 85,476 subscribers

Backend and Database Courses https://t.co/Qonec4YftL YouTube https://t.co/FfDg8cnVCI Author of https://t.co/PcX2tDsIxC Engineer @esri

Shorts

One of the most detailed blogs I have read in a while, discussing the internals of OS scheduling. Tony goes into the weeds of how io, processes and threads work. Uses C to explore async io and talks about different concepts. Check it out

One of the most detailed blogs I have read in a while, discussing the internals of OS scheduling. Tony goes into the weeds of how io, processes and threads work. Uses C to explore async io and talks about different concepts. Check it out

63,143 views

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How Postgres 17 improves IN queries In prior releases, postgres would loop and do multiple "primitive" index scans as many as your IN elements. In Postgres 17 it takes an array and eliminates the need for multiple scans. This only applies for constant values

How Postgres 17 improves IN queries In prior releases, postgres would loop and do multiple "primitive" index scans as many as your IN elements. In Postgres 17 it takes an array and eliminates the need for multiple scans. This only applies for constant values

143,151 views • 1 year ago

Asynchronous IO is the best feature In Postgres 18 yet. PG 18 has been released with many exciting features such as UUIDv7, Over explain module, composite index skip scans, and the most anticipated asynchronous IO with worker and io_uring mode which I uncover in this show. Hope you enjoy it 0:00 Intro 1:30 Synchronous vs Asynchronous calls 3:00 Synchronous IO 6:30 Asynchronous IO 10:00 Postgres 17 synchronous io 17:20 The challenge of Async IO in Postgres 18 20:00 io_method worker 23:00 io_method io_uring 29:30 io_method sync 31:08 Async IO isn’t done! 31:30 Support for backend writers 32:36 Improve worker io_method 33:00 direct io support 37:00 Summary

Asynchronous IO is the best feature In Postgres 18 yet. PG 18 has been released with many exciting features such as UUIDv7, Over explain module, composite index skip scans, and the most anticipated asynchronous IO with worker and io_uring mode which I uncover in this show. Hope you enjoy it 0:00 Intro 1:30 Synchronous vs Asynchronous calls 3:00 Synchronous IO 6:30 Asynchronous IO 10:00 Postgres 17 synchronous io 17:20 The challenge of Async IO in Postgres 18 20:00 io_method worker 23:00 io_method io_uring 29:30 io_method sync 31:08 Async IO isn’t done! 31:30 Support for backend writers 32:36 Improve worker io_method 33:00 direct io support 37:00 Summary

43,962 views • 8 months ago

Memcachd Crash Course 0:00 Intro 4:40 What is Memcached? 7:45 Memory management 16:00 LRU 25:17 Threading and Connections 30:40 Read Example 34:30 Write Example 36:17 Write and Read collisions 39:40 Locking 40:30 Distributed Cache 43:30 Memcached with NodeJS

Memcachd Crash Course 0:00 Intro 4:40 What is Memcached? 7:45 Memory management 16:00 LRU 25:17 Threading and Connections 30:40 Read Example 34:30 Write Example 36:17 Write and Read collisions 39:40 Locking 40:30 Distributed Cache 43:30 Memcached with NodeJS

57,095 views • 1 year ago

If you spin up 5 processes from the same executable, the code is loaded once and shared between all of them. The beauty of Virtual memory.

If you spin up 5 processes from the same executable, the code is loaded once and shared between all of them. The beauty of Virtual memory.

21,133 views • 5 months ago

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