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CavalliumDBEngine
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set setMaxWriteBufferNumberToMaintain 2

This commit is contained in:
Andrea Cavalli 2023-05-22 20:25:57 +02:00
parent 2f5c8b618f
commit 93fc28101a
1 changed files with 14 additions and 10 deletions
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24
src/main/java/it/cavallium/dbengine/database/disk/LLLocalKeyValueDatabase.java
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@ -245,19 +245,17 @@ public class LLLocalKeyValueDatabase extends Backuppable implements LLKeyValueDa
}
if (isDisableAutoCompactions()) {
columnFamilyOptions.setLevel0FileNumCompactionTrigger(-1);
} else {
if (!FOLLOW_ROCKSDB_OPTIMIZATIONS) {
// ArangoDB uses a value of 2: https://www.arangodb.com/docs/stable/programs-arangod-rocksdb.html
// Higher values speed up writes, but slow down reads
columnFamilyOptions.setLevel0FileNumCompactionTrigger(2);
}
} else if (!FOLLOW_ROCKSDB_OPTIMIZATIONS) {
// ArangoDB uses a value of 2: https://www.arangodb.com/docs/stable/programs-arangod-rocksdb.html
// Higher values speed up writes, but slow down reads
columnFamilyOptions.setLevel0FileNumCompactionTrigger(2);
}
if (isDisableSlowdown()) {
columnFamilyOptions.setLevel0SlowdownWritesTrigger(-1);
columnFamilyOptions.setLevel0StopWritesTrigger(Integer.MAX_VALUE);
columnFamilyOptions.setHardPendingCompactionBytesLimit(Long.MAX_VALUE);
columnFamilyOptions.setSoftPendingCompactionBytesLimit(Long.MAX_VALUE);
} else {
} {
// https://www.arangodb.com/docs/stable/programs-arangod-rocksdb.html
columnFamilyOptions.setLevel0SlowdownWritesTrigger(20);
// https://www.arangodb.com/docs/stable/programs-arangod-rocksdb.html
@ -306,6 +304,7 @@ public class LLLocalKeyValueDatabase extends Backuppable implements LLKeyValueDa
if (columnOptions.writeBufferSize().isPresent()) {
columnFamilyOptions.setWriteBufferSize(columnOptions.writeBufferSize().get());
}
columnFamilyOptions.setMaxWriteBufferNumberToMaintain(2);
if (tableOptions instanceof BlockBasedTableConfig blockBasedTableConfig) {
blockBasedTableConfig.setVerifyCompression(false);
}
@ -886,7 +885,7 @@ public class LLLocalKeyValueDatabase extends Backuppable implements LLKeyValueDa
refs.track(options);
options.setEnablePipelinedWrite(true);
var maxSubCompactions = Integer.parseInt(System.getProperty("it.cavallium.dbengine.compactions.max.sub", "-1"));
if (maxSubCompactions >= 0) {
if (maxSubCompactions > 0) {
options.setMaxSubcompactions(maxSubCompactions);
}
var customWriteRate = Long.parseLong(System.getProperty("it.cavallium.dbengine.write.delayedrate", "-1"));
@ -945,13 +944,18 @@ public class LLLocalKeyValueDatabase extends Backuppable implements LLKeyValueDa
final boolean allowMmapReads = !useDirectIO && databaseOptions.allowMemoryMapping();
final boolean allowMmapWrites = !useDirectIO && (databaseOptions.allowMemoryMapping()
|| parseBoolean(System.getProperty("it.cavallium.dbengine.mmapwrites.enable", "false")));
// todo: replace with a real option called database-write-buffer-size
// 0 = default = disabled
long dbWriteBufferSize = Long.parseLong(System.getProperty("it.cavallium.dbengine.dbwritebuffer.size", "0"));
if (databaseOptions.lowMemory()) {
// LOW MEMORY
options
.setBytesPerSync(0) // default
.setWalBytesPerSync(0) // default
.setIncreaseParallelism(1)
.setDbWriteBufferSize(8 * SizeUnit.MB)
.setDbWriteBufferSize(Math.min(dbWriteBufferSize, 8 * SizeUnit.MB))
.setWalTtlSeconds(60)
.setMaxTotalWalSize(10 * SizeUnit.GB)
;
@ -977,7 +981,7 @@ public class LLLocalKeyValueDatabase extends Backuppable implements LLKeyValueDa
} else {
// HIGH MEMORY
options
//.setDbWriteBufferSize(64 * SizeUnit.MB)
.setDbWriteBufferSize(dbWriteBufferSize)
.setBytesPerSync(64 * SizeUnit.MB)
.setWalBytesPerSync(64 * SizeUnit.MB)