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