chibenwa commented on a change in pull request #476:
URL: https://github.com/apache/james-project/pull/476#discussion_r647370004
##########
File path:
mailbox/cassandra/src/main/java/org/apache/james/mailbox/cassandra/modules/CassandraMailboxModule.java
##########
@@ -42,7 +42,8 @@
.comment("Holds the mailboxes information.")
.options(options -> options
.caching(SchemaBuilder.KeyCaching.ALL,
-
SchemaBuilder.rows(CassandraConstants.DEFAULT_CACHED_ROW_PER_PARTITION)))
+
SchemaBuilder.rows(CassandraConstants.DEFAULT_CACHED_ROW_PER_PARTITION))
+ .compressionOptions(SchemaBuilder.lz4().withChunkLengthInKb(8)))
Review comment:
https://thelastpickle.com/blog/2018/08/08/compression_performance.html
TLDR: Using out of the box settings for compression on read heavy or mixed
workloads will almost certainly put unnecessary strain on your disk while
hurting your read performance.
Basically I tried a couple of values (4K, 8K, 16K, ...) and 8KB worked well.
Globally the idea is to decrease this value for all the relevant tables.
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