The big new feature if that full chunks in the TSDB head block are now stored in mmaped, rather than on the heap. This reduces memory requirements particularly for higher frequency scraping, and allows for faster restarts. There's also been improvements in isolation performance.
Triton service discovery now supports global zones, the alert resend throttling is more tolerant of failures, and there's a new
There’s also a number of improvements, bug fixes and other changes, see the release notes for more detail.
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