Backport pr 18756 v24.1.x 104 #19850
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When the cloud storage cache is completely filled, puts to the cache are blocked. This prevents readers from progressing. In some clusters the trim operation can take a long time, up to hours. When this happens, readers will time out, generating errors. This commit adds two configuration options that control when the trim is triggered. By setting these lower than the caches maximum size, cloud storage can begin a trim operation before the cache is completely filled, allowing readers to progress as the trim is going on in the background. - cloud_storage_cache_trim_threshold_size - cloud_storage_cache_trim_threshold_objects When a put occurs, if the cache is over these limits it triggers a trim in the background. (cherry picked from commit 027632c)
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Backport of PR #18756
Backports Required