ISAR/libmdbx
3
0
Fork 0
mirror of https://github.com/isar/libmdbx.git synced 2024-10-29 23:19:20 +08:00
Code Issues Packages Projects Releases Wiki Activity

mdbx-doc: actualize MDBX's limits.

Browse Source 
Change-Id: I8ad4a47a30df7f900bf5396bff616ce58fcea101
This commit is contained in:
Leonid Yuriev 2021-03-19 18:31:15 +03:00
parent 422d030820
commit f32435e9b1
1 changed files with 5 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
README.md
View File

@ -154,11 +154,11 @@ transaction journal. No crash recovery needed. No maintenance is required.
## Limitations
- **Page size**: a power of 2, maximum `65536` bytes, default `4096` bytes.
- **Key size**: minimum 0, maximum ≈¼ pagesize (`1300` bytes for default 4K pagesize, `21780` bytes for 64K pagesize).
- **Value size**: minimum 0, maximum `2146435072` (`0x7FF00000`) bytes for maps, ≈¼ pagesize for multimaps (`1348` bytes for default 4K pagesize, `21828` bytes for 64K pagesize).
- **Write transaction size**: up to `4194301` (`0x3FFFFD`) pages (16 [GiB](https://en.wikipedia.org/wiki/Gibibyte) for default 4K pagesize, 256 [GiB](https://en.wikipedia.org/wiki/Gibibyte) for 64K pagesize).
- **Database size**: up to `2147483648` pages (8 [TiB](https://en.wikipedia.org/wiki/Tebibyte) for default 4K pagesize, 128 [TiB](https://en.wikipedia.org/wiki/Tebibyte) for 64K pagesize).
- **Page size**: a power of 2, minimum `256` (mostly for testing), maximum `65536` bytes, default `4096` bytes.
- **Key size**: minimum `0`, maximum ≈¼ pagesize (`1348` bytes for default 4K pagesize, `21828` bytes for 64K pagesize).
- **Value size**: minimum `0`, maximum `2146435072` (`0x7FF00000`) bytes for maps, ≈¼ pagesize for multimaps (`1348` bytes for default 4K pagesize, `21828` bytes for 64K pagesize).
- **Write transaction size**: up to `1327217884` pages (`4.944272` TiB for default 4K pagesize, `79.108351` TiB for 64K pagesize).
- **Database size**: up to `2147483648` pages (≈`8.0` TiB for default 4K pagesize, ≈`128.0` TiB for 64K pagesize).
- **Maximum sub-databases**: `32765`.
## Gotchas