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## Problem Multiple increase/decrease LFC limit may cause unlimited growth of LFC file because punched holes while LFC shrinking are not reused when LFC is extended. ## Summary of changes Keep track of holes and reused them when LFC size is increased. ## Checklist before requesting a review - [ ] I have performed a self-review of my code. - [ ] If it is a core feature, I have added thorough tests. - [ ] Do we need to implement analytics? if so did you add the relevant metrics to the dashboard? - [ ] If this PR requires public announcement, mark it with /release-notes label and add several sentences in this section. ## Checklist before merging - [ ] Do not forget to reformat commit message to not include the above checklist --------- Co-authored-by: Konstantin Knizhnik <knizhnik@neon.tech>
neon extension consists of several parts:
shared preload library neon.so
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implements storage manager API and network communications with remote page server.
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walproposer: implements broadcast protocol between postgres and WAL safekeepers.
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control plane connector: Captures updates to roles/databases using ProcessUtility_hook and sends them to the control ProcessUtility_hook.
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remote extension server: Request compute_ctl to download extension files.
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file_cache: Local file cache is used to temporary store relations pages in local file system for better performance.
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relsize_cache: Relation size cache for better neon performance.
SQL functions in neon--*.sql
Utility functions to expose neon specific information to user and metrics collection. This extension is created in all databases in the cluster by default.