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new 8599f93 Update compaction_throughput_mb_per_sec default from 16 to 64
8599f93 is described below
commit 8599f93d9a6b198913228c05accceba9398ba17a
Author: Jeremy Hanna <[email protected]>
AuthorDate: Mon Jul 6 10:48:44 2020 +1000
Update compaction_throughput_mb_per_sec default from 16 to 64
patch by Jeremy Hanna; reviewed by Mick Semb Wever for CASSANDRA-14902
---
CHANGES.txt | 1 +
NEWS.txt | 2 ++
conf/cassandra.yaml | 7 ++++---
3 files changed, 7 insertions(+), 3 deletions(-)
diff --git a/CHANGES.txt b/CHANGES.txt
index 9bca849..231a19b 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -1,4 +1,5 @@
4.0-alpha5
+ * Update compaction_throughput_mb_per_sec throttle default to 64
(CASSANDRA-14902)
* Add option to disable compaction at startup (CASSANDRA-15927)
* FBUtilities.getJustLocalAddress falls back to lo ip on misconfigured nodes
(CASSANDRA-15901)
* Close channel and reduce buffer allocation during entire sstable streaming
with SSL (CASSANDRA-15900)
diff --git a/NEWS.txt b/NEWS.txt
index 4d2252a..7b9676b 100644
--- a/NEWS.txt
+++ b/NEWS.txt
@@ -251,6 +251,8 @@ Upgrading
four digits need to be prefixed with a plus or minus sign.
- cqlsh now returns a non-zero code in case of errors. This is a backward
incompatible change so it may
break existing scripts that rely on the current behavior. See
CASSANDRA-15623 for more details.
+ - Updated the default compaction_throughput_mb_per_sec to to 64. The
original
+ default (16) was meant for spinning disk volumes. See CASSANDRA-14902
for details.
Deprecation
diff --git a/conf/cassandra.yaml b/conf/cassandra.yaml
index 80dbf38..4bd72cf 100644
--- a/conf/cassandra.yaml
+++ b/conf/cassandra.yaml
@@ -831,9 +831,10 @@ concurrent_materialized_view_builders: 1
# system. The faster you insert data, the faster you need to compact in
# order to keep the sstable count down, but in general, setting this to
# 16 to 32 times the rate you are inserting data is more than sufficient.
-# Setting this to 0 disables throttling. Note that this account for all types
-# of compaction, including validation compaction.
-compaction_throughput_mb_per_sec: 16
+# Setting this to 0 disables throttling. Note that this accounts for all types
+# of compaction, including validation compaction (building Merkle trees
+# for repairs).
+compaction_throughput_mb_per_sec: 64
# When compacting, the replacement sstable(s) can be opened before they
# are completely written, and used in place of the prior sstables for
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