Postgres in Docker: The shm_size Gotcha
Docker gives Postgres a 64MB /dev/shm. A big parallel query then dies with 'could not resize shared memory segment'. Here is the fix and the trap behind it.
Tag: troubleshooting
All the articles with the tag "troubleshooting".
mtr vs traceroute: Packet Loss
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traceroute lies. mtr tells the truth. Here's how to read packet-loss reports like an oncall engineer and stop blaming your ISP for the wrong hop.
A Guide to Fixing OpenH264 Access Issues
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Cisco's OpenH264 download server geoblocks sanctioned regions, breaking Firefox and Flatpak installs. Four practical fixes, ranked simple to nuclear.