mariadb/storage
Marko Mäkelä 88cdfc5c7d MDEV-20487 Set innodb_adaptive_hash_index=OFF by default
Based on the performance testing that was conducted in MDEV-17492,
the InnoDB adaptive hash index could only help performance in specific,
almost-read-only workloads. It could slow down all kinds of workloads
(especially DROP TABLE, TRUNCATE TABLE, ALTER TABLE, or DROP INDEX
operations), and it can become corrupted, causing crashes (such as
MDEV-18815, MDEV-20203) and possibly data corruption. Furthermore,
the adaptive hash index consumes space from the InnoDB buffer pool,
which could hurt performance when the working set would almost fit
in the buffer pool.

Given all this, it is best to disable the adaptive hash index by default.
2019-10-23 17:43:31 +03:00
..
archive
blackhole
cassandra
connect
csv
example
federated
federatedx
heap
innobase MDEV-20487 Set innodb_adaptive_hash_index=OFF by default 2019-10-23 17:43:31 +03:00
maria Don't crash in S3 if Aria is not initialzed 2019-10-20 12:16:52 +03:00
mroonga
myisam MDEV-12684 Show what config file a sysvar got a value from 2019-10-14 10:29:30 +02:00
myisammrg
oqgraph
perfschema
rocksdb
sequence MDEV-16327: Server doesn't account for engines that supports OFFSET on their own. 2019-10-13 09:40:41 +02:00
sphinx
spider
test_sql_discovery
tokudb