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2eda484ef6
This reduces pressure on the OS TCP read buffer by increasing the moments we read data out of the receive buffer, and increasing the number of bytes we can pull from that buffer when we do reads. ## Problem A backend may not always consume its prefetch data quick enough ## Summary of changes We add a new function `prefetch_pump_state` which pulls as many prefetch requests from the OS TCP receive buffer as possible, but without blocking. This thus reduces pressure on OS-level TCP buffers, thus increasing throughput by limiting throttling caused by full TCP buffers.
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.