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mdbx: rework API and Docs around Handle-Slow-Readers (no algorithmic changes).

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Change-Id: I5b76a8400ce6f5f241f8e4a7f53d746fe39f8e1e
This commit is contained in:
Leonid Yuriev
2020-09-29 19:24:57 +03:00
parent 6294e1710a
commit c8a0951566
12 changed files with 124 additions and 90 deletions
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docs/_restrictions.md
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@@ -147,9 +147,9 @@ or debugging of a client application while retaining an active read
transaction. LMDB this results in `MDB_MAP_FULL` error and subsequent write
performance degradation.
MDBX mostly solve "long-lived" readers issue by the lack-of-space callback
which allow to aborts long readers, and by the `MDBX_LIFORECLAIM` mode which
addresses subsequent performance degradation.
MDBX mostly solve "long-lived" readers issue by using the Handle-Slow-Readers
\ref MDBX_hsr_func callback which allows to abort long-lived read transactions,
and using the \ref MDBX_LIFORECLAIM mode which addresses subsequent performance degradation.
The "next" version of libmdbx (MithrilDB) will completely solve this.
- Avoid suspending a process with active transactions. These would then be