[iotdb] 01/01: add MAX_CACHED_BUFFER_SIZE

[xi...@apache.org]

This is an automated email from the ASF dual-hosted git repository.

xiangweiwei pushed a commit to branch 0.12maxCachedBuffer
in repository https://gitbox.apache.org/repos/asf/iotdb.git

commit 124b5eb8eb0318ab532d17c17217520ce2533c5a
Author: Alima777 <wx...@gmail.com>
AuthorDate: Sat Nov 27 17:09:44 2021 +0800

    add MAX_CACHED_BUFFER_SIZE
---
 server/src/assembly/resources/conf/iotdb-env.bat | 4 ++++
 server/src/assembly/resources/conf/iotdb-env.sh  | 7 ++++++-
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/server/src/assembly/resources/conf/iotdb-env.bat b/server/src/assembly/resources/conf/iotdb-env.bat
index 6a165ba..72a1237 100755
--- a/server/src/assembly/resources/conf/iotdb-env.bat
+++ b/server/src/assembly/resources/conf/iotdb-env.bat
@@ -103,9 +103,13 @@ for /f "tokens=1-3" %%j in ('java -version 2^>^&1') do (
 
 @REM maximum direct memory size
 set MAX_DIRECT_MEMORY_SIZE=%MAX_HEAP_SIZE%
+@REM Max cached buffer size, Note: unit can only be B!
+@REM which equals DIRECT_MEMORY_SIZE / threads number that may use direct memory / buffer cache size(IOV_MAX) depends on operating system
+set MAX_DIRECT_MEMORY_SIZE=%max_heap_size_in_mb% * 1024 * 1024 / 16 / 1024
 
 set IOTDB_HEAP_OPTS=-Xmx%MAX_HEAP_SIZE% -Xms%HEAP_NEWSIZE% -Xlog:gc:"..\gc.log"
 set IOTDB_HEAP_OPTS=%IOTDB_HEAP_OPTS% -XX:MaxDirectMemorySize=%MAX_DIRECT_MEMORY_SIZE%
+set IOTDB_HEAP_OPTS=%IOTDB_HEAP_OPTS% -Djdk.nio.maxCachedBufferSize=%MAX_CACHED_BUFFER_SIZE%
 
 @REM You can put your env variable here
 @REM set JAVA_HOME=%JAVA_HOME%
diff --git a/server/src/assembly/resources/conf/iotdb-env.sh b/server/src/assembly/resources/conf/iotdb-env.sh
index 9d6abe0..e9ecec8 100755
--- a/server/src/assembly/resources/conf/iotdb-env.sh
+++ b/server/src/assembly/resources/conf/iotdb-env.sh
@@ -205,8 +205,12 @@ calculate_heap_sizes
 #MAX_HEAP_SIZE="2G"
 # Minimum heap size
 #HEAP_NEWSIZE="2G"
-# maximum direct memory size
+# Maximum direct memory size
 MAX_DIRECT_MEMORY_SIZE=${MAX_HEAP_SIZE}
+# Max cached buffer size, Note: unit can only be B!
+# which equals DIRECT_MEMORY_SIZE / threads number that may use direct memory / buffer cache size(IOV_MAX) depends on operating system
+MAX_CACHED_BUFFER_SIZE=`expr $max_heap_size_in_mb \* 1024 \* 1024 / 16 / 1024`
+echo $MAX_CACHED_BUFFER_SIZE
 
 #true or false
 #DO NOT FORGET TO MODIFY THE PASSWORD FOR SECURITY (${IOTDB_CONF}/jmx.password and ${IOTDB_CONF}/jmx.access)
@@ -240,6 +244,7 @@ fi
 IOTDB_JMX_OPTS="$IOTDB_JMX_OPTS -Xms${HEAP_NEWSIZE}"
 IOTDB_JMX_OPTS="$IOTDB_JMX_OPTS -Xmx${MAX_HEAP_SIZE}"
 IOTDB_JMX_OPTS="$IOTDB_JMX_OPTS -XX:MaxDirectMemorySize=${MAX_DIRECT_MEMORY_SIZE}"
+IOTDB_JMX_OPTS="$IOTDB_JMX_OPTS -Djdk.nio.maxCachedBufferSize=${MAX_CACHED_BUFFER_SIZE}"
 
 echo "Maximum memory allocation pool = ${MAX_HEAP_SIZE}B, initial memory allocation pool = ${HEAP_NEWSIZE}B"
 echo "If you want to change this configuration, please check conf/iotdb-env.sh(Unix or OS X, if you use Windows, check conf/iotdb-env.bat)."