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[8.2] MOD-12212: Fix index load from RDB temporary memory overhead#7384

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Itzikvaknin merged 3 commits into8.2from
manual-backport-7336-to-8.2
Nov 18, 2025
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[8.2] MOD-12212: Fix index load from RDB temporary memory overhead#7384
Itzikvaknin merged 3 commits into8.2from
manual-backport-7336-to-8.2

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@Itzikvaknin Itzikvaknin commented Nov 17, 2025

Manual backport of 7336


Note

Avoid starting GC for duplicate indexes during RDB load; add test ensuring multiple duplicate entries result in a single stored index.

  • Backend (RDB load):
    • Move IndexSpec_StartGC(ctx, spec_ref, sp) to only run after confirming not a duplicate in IndexSpec_CreateFromRdb, preventing GC init for duplicates.
  • Tests:
    • Add testDuplicateIndexRdbLoad in tests/cpptests/test_cpp_rdb.cpp to save the same index 30× and verify only one instance loads and is stored.
  • Misc:
    • Minor whitespace/formatting cleanups (e.g., FieldSpec_RdbLoad call alignment).

Written by Cursor Bugbot for commit 8d3086c. This will update automatically on new commits. Configure here.

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.39%. Comparing base (7e45672) to head (8d3086c).
⚠️ Report is 2 commits behind head on 8.2.

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@@            Coverage Diff             @@
##              8.2    #7384      +/-   ##
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==========================================
  Files         253      253              
  Lines       40800    40800              
  Branches     3725     3725              
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- Hits        36496    36475      -21     
- Misses       4255     4276      +21     
  Partials       49       49              
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@Itzikvaknin Itzikvaknin force-pushed the manual-backport-7336-to-8.2 branch from 18b5237 to c3e8592 Compare November 17, 2025 14:50
…data from RDB. (#7336)

* Condition IndexSpec_StartGC and Cursors_initSpec calls on sp->isDuplicate == false

* change compatible_redis_version: "8.2"

* Revert "change compatible_redis_version: "8.2""

This reverts commit 0d1e0bd.

* Add testDuplicateIndexRdbLoad to test the duplicate spec case

* Minor

* Remove index spec validation since the env is not isolated

* Improve testDuplicateIndexRdbLoad
@Itzikvaknin Itzikvaknin force-pushed the manual-backport-7336-to-8.2 branch from c3e8592 to af42590 Compare November 17, 2025 15:45
@Itzikvaknin Itzikvaknin deleted the manual-backport-7336-to-8.2 branch November 17, 2025 15:47
@Itzikvaknin Itzikvaknin restored the manual-backport-7336-to-8.2 branch November 17, 2025 15:48
@Itzikvaknin Itzikvaknin reopened this Nov 17, 2025
@Itzikvaknin Itzikvaknin requested a review from kei-nan November 18, 2025 07:34
@Itzikvaknin Itzikvaknin added this pull request to the merge queue Nov 18, 2025
Merged via the queue into 8.2 with commit be9b2d8 Nov 18, 2025
19 checks passed
@Itzikvaknin Itzikvaknin deleted the manual-backport-7336-to-8.2 branch November 18, 2025 11:00
alonre24 added a commit to alonre24/redis that referenced this pull request Jan 26, 2026
**Bug Fixes:**

* [redis#7219](RediSearch/RediSearch#7219) Fix a concurrency issue on Reducer in `FT.AGGREGATE`
* [redis#7255](RediSearch/RediSearch#7255) Fix `BM25STD` underflow wraparound
* [redis#7275](RediSearch/RediSearch#7275) Report used memory as `unsigned long long` to avoid underflows
* [redis#7264](RediSearch/RediSearch#7264) Fix `totalDocsLen` updates
* [redis#6995](RediSearch/RediSearch#6995) Do not fanout `FT.INFO` to replicas
* [redis#7350](RediSearch/RediSearch#7350) Fix `FT.CREATE` failure with LeanVec parameters on non-Intel architectures
* [redis#7384](RediSearch/RediSearch#7384) Fix index load from RDB temporary memory overhead
* [redis#7459](RediSearch/RediSearch#7459) Fix Fork GC potential double-free on error path
* [redis#7458](RediSearch/RediSearch#7458) Fix a GC performence regression
* [redis#7470](RediSearch/RediSearch#7470) Avoid draining worker thread pool from FLUSH callback to avoid deadlocks
* [redis#7554](RediSearch/RediSearch#7554) Handle the case where `SCORE` is sent alone without extra fields (coordinator)
* [redis#7685](RediSearch/RediSearch#7685) Fix cursor logical leak
* [redis#7794](RediSearch/RediSearch#7794) Fix `cmp_strings()` to correctly handle binary data with embedded NULLs in TOLIST reducer in FT.AGGREGATE
* [redis#7873](RediSearch/RediSearch#7873) Handle warnings in empty `FT.AGGREGATE` replies (cluster)
* [redis#7886](RediSearch/RediSearch#7886) Remove non-TEXT fields from the spec keys dictionary
* [redis#7904](RediSearch/RediSearch#7904) Refactor keys dictionary handling
* [redis#7901](RediSearch/RediSearch#7901) Support multiple warnings in reply
* [redis#8083](RediSearch/RediSearch#8083) Fix incorrect FULLTEXT field metric counts
* [redis#8153](RediSearch/RediSearch#8153) Fix configuration registration issues

**Improvements:**

* [redis#7154](RediSearch/RediSearch#7154) `FT.AGGREGATE` can return Background Indexing OOM warnings
* [redis#7083](RediSearch/RediSearch#7083) Add the default text scorer as a configuration option
* [redis#7341](RediSearch/RediSearch#7341) Rename `FT.PROFILE` counter fields
* [redis#7436](RediSearch/RediSearch#7436) Enhance `FT.PROFILE` with vector search execution details
* [redis#7435](RediSearch/RediSearch#7435) Ensure full `FT.PROFILE` output on timeout with RETURN policy
* [redis#7534](RediSearch/RediSearch#7534) Reduce the number of worker threads asynchronously to avoid deadlocks during queries
* [redis#7614](RediSearch/RediSearch#7614) Track timeout warnings and errors in INFO
* [redis#7646](RediSearch/RediSearch#7646) Track `maxprefixexpansions` warnings and errors in INFO
* [redis#7577](RediSearch/RediSearch#7577) Track query syntax/argument errors (basis for query error tracking)
* [redis#7737](RediSearch/RediSearch#7737) Add `Internal cursor reads` metric to cluster `FT.PROFILE` output
* [redis#7759](RediSearch/RediSearch#7759) Extend indexing metrics
* [redis#7710](RediSearch/RediSearch#7710) Support `WITHCOUNT` keyword in `FT.AGGREGATE`
* [redis#7957](RediSearch/RediSearch#7957) Persist query warnings across cursor reads
* [redis#8054](RediSearch/RediSearch#8054) Add logging for index-related commands
* [redis#8151](RediSearch/RediSearch#8151) Fix shard total profile time reporting in `FT.PROFILE`
* [redis#8103](RediSearch/RediSearch#8103) Output current thread IndexSpec information on crash
YaacovHazan pushed a commit to redis/redis that referenced this pull request Jan 26, 2026
**Bug Fixes:**

* [#7219](RediSearch/RediSearch#7219) Fix a
concurrency issue on Reducer in `FT.AGGREGATE`
* [#7255](RediSearch/RediSearch#7255) Fix
`BM25STD` underflow wraparound
* [#7275](RediSearch/RediSearch#7275) Report
used memory as `unsigned long long` to avoid underflows
* [#7264](RediSearch/RediSearch#7264) Fix
`totalDocsLen` updates
* [#6995](RediSearch/RediSearch#6995) Do not
fanout `FT.INFO` to replicas
* [#7350](RediSearch/RediSearch#7350) Fix
`FT.CREATE` failure with LeanVec parameters on non-Intel architectures
* [#7694](RediSearch/RediSearch#7694) Use
asynchronous jobs for GC in SVS to accelerate execution
* [#7384](RediSearch/RediSearch#7384) Fix index
load from RDB temporary memory overhead
* [#7459](RediSearch/RediSearch#7459) Fix Fork
GC potential double-free on error path
* [#7458](RediSearch/RediSearch#7458) Fix a GC
performence regression
* [#7470](RediSearch/RediSearch#7470) Avoid
draining worker thread pool from FLUSH callback to avoid deadlocks
* [#7554](RediSearch/RediSearch#7554) Handle the
case where `SCORE` is sent alone without extra fields (coordinator)
* [#7685](RediSearch/RediSearch#7685) Fix cursor
logical leak
* [#7794](RediSearch/RediSearch#7794) Fix
`cmp_strings()` to correctly handle binary data with embedded NULLs in
TOLIST reducer in FT.AGGREGATE
* [#7873](RediSearch/RediSearch#7873) Handle
warnings in empty `FT.AGGREGATE` replies (cluster)
* [#7886](RediSearch/RediSearch#7886) Remove
non-TEXT fields from the spec keys dictionary
* [#7904](RediSearch/RediSearch#7904) Refactor
keys dictionary handling
* [#7901](RediSearch/RediSearch#7901) Support
multiple warnings in reply
* [#8083](RediSearch/RediSearch#8083) Fix
incorrect FULLTEXT field metric counts
* [#8153](RediSearch/RediSearch#8153) Fix
configuration registration issues

**Improvements:**

* [#7154](RediSearch/RediSearch#7154)
`FT.AGGREGATE` can return Background Indexing OOM warnings
* [#7083](RediSearch/RediSearch#7083) Add the
default text scorer as a configuration option
* [#7341](RediSearch/RediSearch#7341) Rename
`FT.PROFILE` counter fields
* [#7436](RediSearch/RediSearch#7436) Enhance
`FT.PROFILE` with vector search execution details
* [#7435](RediSearch/RediSearch#7435) Ensure
full `FT.PROFILE` output on timeout with RETURN policy
* [#7534](RediSearch/RediSearch#7534) Reduce the
number of worker threads asynchronously to avoid deadlocks during
queries
* [#7614](RediSearch/RediSearch#7614) Track
timeout warnings and errors in INFO
* [#7646](RediSearch/RediSearch#7646) Track
`maxprefixexpansions` warnings and errors in INFO
* [#7577](RediSearch/RediSearch#7577) Track
query syntax/argument errors (basis for query error tracking)
* [#7737](RediSearch/RediSearch#7737) Add
`Internal cursor reads` metric to cluster `FT.PROFILE` output
* [#7759](RediSearch/RediSearch#7759) Extend
indexing metrics
* [#7710](RediSearch/RediSearch#7710) Support
`WITHCOUNT` keyword in `FT.AGGREGATE`
* [#7957](RediSearch/RediSearch#7957) Persist
query warnings across cursor reads
* [#8054](RediSearch/RediSearch#8054) Add
logging for index-related commands
* [#8151](RediSearch/RediSearch#8151) Fix shard
total profile time reporting in `FT.PROFILE`
* [#8103](RediSearch/RediSearch#8103) Output
current thread IndexSpec information on crash
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