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| author | sundb <sundbcn@gmail.com> | 2021-11-24 19:34:13 +0800 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2021-11-24 13:34:13 +0200 |
| commit | 4512905961b3a2f4c00e5fe7ffff8d96db82861e (patch) | |
| tree | ba9627b240ede304c3c87a542d22bee5173dd929 /redis.conf | |
| parent | fb4f7be22c6f26faf3f222d1ff8d7119fd6c084e (diff) | |
| download | redis-4512905961b3a2f4c00e5fe7ffff8d96db82861e.tar.gz | |
Replace ziplist with listpack in quicklist (#9740)
Part three of implementing #8702, following #8887 and #9366 .
## Description of the feature
1. Replace the ziplist container of quicklist with listpack.
2. Convert existing quicklist ziplists on RDB loading time. an O(n) operation.
## Interface changes
1. New `list-max-listpack-size` config is an alias for `list-max-ziplist-size`.
2. Replace `debug ziplist` command with `debug listpack`.
## Internal changes
1. Add `lpMerge` to merge two listpacks . (same as `ziplistMerge`)
2. Add `lpRepr` to print info of listpack which is used in debugCommand and `quicklistRepr`. (same as `ziplistRepr`)
3. Replace `QUICKLIST_NODE_CONTAINER_ZIPLIST` with `QUICKLIST_NODE_CONTAINER_PACKED`(following #9357 ).
It represent that a quicklistNode is a packed node, as opposed to a plain node.
4. Remove `createZiplistObject` method, which is never used.
5. Calculate listpack entry size using overhead overestimation in `quicklistAllowInsert`.
We prefer an overestimation, which would at worse lead to a few bytes below the lowest limit of 4k.
## Improvements
1. Calling `lpShrinkToFit` after converting Ziplist to listpack, which was missed at #9366.
2. Optimize `quicklistAppendPlainNode` to avoid memcpy data.
## Bugfix
1. Fix crash in `quicklistRepr` when ziplist is compressed, introduced from #9366.
## Test
1. Add unittest for `lpMerge`.
2. Modify the old quicklist ziplist corrupt dump test.
Co-authored-by: Oran Agra <oran@redislabs.com>
Diffstat (limited to 'redis.conf')
| -rw-r--r-- | redis.conf | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/redis.conf b/redis.conf index cccc48e00..47a393c7a 100644 --- a/redis.conf +++ b/redis.conf @@ -1737,7 +1737,7 @@ hash-max-listpack-value 64 # per list node. # The highest performing option is usually -2 (8 Kb size) or -1 (4 Kb size), # but if your use case is unique, adjust the settings as necessary. -list-max-ziplist-size -2 +list-max-listpack-size -2 # Lists may also be compressed. # Compress depth is the number of quicklist ziplist nodes from *each* side of |