34 lines
1.5 KiB
Plaintext
34 lines
1.5 KiB
Plaintext
[[release-notes-7.9.0]]
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== {es} version 7.9.0
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Also see <<breaking-changes-7.9,Breaking changes in 7.9>>.
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[[breaking-7.9.0]]
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[float]
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=== Breaking changes
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Script Cache::
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* Script cache size and rate limiting are per-context {es-pull}55753[#55753] (issue: {es-issue}50152[#50152])
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Field capabilities API::
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* Constant_keyword fields are now described by their family type `keyword` instead of `constant_keyword` {es-pull}58483[#58483] (issue: {es-issue}53175[#53175])
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Snapshot restore throttling::
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* Restoring from a snapshot (which is a particular form of recovery) is now
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properly taking recovery throttling into account (i.e. the
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`indices.recovery.max_bytes_per_sec` setting).
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The `max_restore_bytes_per_sec` setting is also now defaulting to
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unlimited, whereas previously it was set to `40mb`, which is the
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default that's used for `indices.recovery.max_bytes_per_sec`. This means
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that no behavioral change will be observed by clusters where the recovery
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and restore settings had not been adapted from the defaults. {es-pull}58658[#58658]
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Thread pool write queue size::
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* The WRITE thread pool default queue size (`thread_pool.write.size`) has been
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increased from 200 to 10000. A small queue size (200) caused issues when users
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wanted to send small indexing requests with a high client count. Additional
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memory-oriented back pressure has been introduced with the
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`indexing_pressure.memory.limit` setting. This setting configures a limit to
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the number of bytes allowed to be consumed by outstanding indexing requests.
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{es-issue}59263[#59263]
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