credativ® Blog
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Category: PostgreSQL®
06 January 2026
Dissecting PostgreSQL Data Corruption
PostgreSQL 18 made one very important change – data block checksums are now enabled by default for new clusters at cluster initialization time. I already wrote about it in my previous article. I also mentioned that there are still many existing PostgreSQL installations without data checksums enabled, because this was the default in previous versions. […]
15 December 2025
PostgreSQL 18 Asynchronous Disk I/O - Deep Dive Into Implementation
PostgreSQL 17 introduced streaming I/O – grouping multiple page reads into a single system call and using smarter posix_fadvise() hints. That alone gave up to ~30% faster sequential scans in some workloads, but it was still strictly synchronous: each backend process would issue a read and then sit there waiting for the kernel to return […]