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Diffstat (limited to 'releasenotes/notes')
| -rw-r--r-- | releasenotes/notes/innodb_flush_log_at_trx_commit-eb7d99749ca3c911.yaml | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/releasenotes/notes/innodb_flush_log_at_trx_commit-eb7d99749ca3c911.yaml b/releasenotes/notes/innodb_flush_log_at_trx_commit-eb7d99749ca3c911.yaml new file mode 100644 index 0000000..7dbd5a7 --- /dev/null +++ b/releasenotes/notes/innodb_flush_log_at_trx_commit-eb7d99749ca3c911.yaml @@ -0,0 +1,17 @@ +--- +features: + - | + Enable innodb_flush_log_at_trx_commit configuration for Galera only. +upgrade: + - | + Setting the innodb_flush_log_at_trx_commit flag to the value of "2" instead + of its default value of "1" means that the underlying MySQL/MariaDB engine + will no longer flush transactions to disk on a per-transaction basis; + instead, flushes occur once per second. This leads to far fewer + disk writes and can dramatically improve write performance, at the cost + of durability (e.g. will lose the last second's worth of transactions) + if the database engine is ungracefully shut down. The + clustered nature of Galera mitigates this risk in that transactions + are replicated to other nodes before completion, and the setting of + "2" is considered to be generally safe for a Galera cluster, with the + exception case of simultaneous power loss for all nodes. |