public void start() {
try {
// Construct and initialize the buffer manager
this.bufferMgr = new BufferManagerImpl();
this.bufferMgr.setProcessorBatchSize(processorBatchSize);
this.bufferMgr.setMaxReserveKB(this.maxReserveKb);
this.bufferMgr.setMaxProcessingKB(this.maxProcessingKb);
this.bufferMgr.setInlineLobs(inlineLobs);
this.bufferMgr.initialize();
// If necessary, add disk storage manager
if (useDisk) {
LogManager.logDetail(
LogConstants.CTX_DQP, "Starting BufferManager using", bufferDir); // $NON-NLS-1$
if (!bufferDir.exists()) {
this.bufferDir.mkdirs();
}
// start the file storage manager in clean state
// wise FileStorageManager is smart enough to clean up after itself
cleanDirectory(bufferDir);
// Get the properties for FileStorageManager and create.
fsm = new FileStorageManager();
fsm.setStorageDirectory(bufferDir.getCanonicalPath());
fsm.setMaxOpenFiles(maxOpenFiles);
fsm.setMaxBufferSpace(maxBufferSpace * MB);
SplittableStorageManager ssm = new SplittableStorageManager(fsm);
ssm.setMaxFileSize(maxFileSize);
fsc = new BufferFrontedFileStoreCache();
fsc.setMaxStorageObjectSize(maxStorageObjectSize);
fsc.setDirect(memoryBufferOffHeap);
int batchOverheadKB =
(int)
(this.memoryBufferSpace < 0
? (this.bufferMgr.getMaxReserveKB() << 8)
: this.memoryBufferSpace)
>> 20;
this.bufferMgr.setMaxReserveKB(
Math.max(0, this.bufferMgr.getMaxReserveKB() - batchOverheadKB));
if (memoryBufferSpace < 0) {
// use approximately 25% of what's set aside for the reserved
fsc.setMemoryBufferSpace(((long) this.bufferMgr.getMaxReserveKB()) << 8);
} else {
// scale from MB to bytes
fsc.setMemoryBufferSpace(memoryBufferSpace << 20);
}
if (!memoryBufferOffHeap && this.maxReserveKb < 0) {
// adjust the value
this.bufferMgr.setMaxReserveKB(
this.bufferMgr.getMaxReserveKB()
- (int)
Math.min(
this.bufferMgr.getMaxReserveKB(), (fsc.getMemoryBufferSpace() >> 10)));
}
fsc.setStorageManager(ssm);
fsc.initialize();
this.bufferMgr.setCache(fsc);
this.workingMaxReserveKb = this.bufferMgr.getMaxReserveKB();
} else {
this.bufferMgr.setCache(new MemoryStorageManager());
}
} catch (TeiidComponentException e) {
throw new TeiidRuntimeException(
RuntimePlugin.Event.TEIID40039, e, RuntimePlugin.Util.gs(RuntimePlugin.Event.TEIID40039));
} catch (IOException e) {
throw new TeiidRuntimeException(
RuntimePlugin.Event.TEIID40039, e, RuntimePlugin.Util.gs(RuntimePlugin.Event.TEIID40039));
}
}
public long getDiskWriteCount() {
if (fsc != null) {
return fsc.getStorageWrites();
}
return 0;
}
public long getMemoryBufferUsedKB() {
if (fsc != null) {
return fsc.getMemoryInUseBytes() >> 10;
}
return 0;
}
public long getDiskReadCount() {
if (fsc != null) {
return fsc.getStorageReads();
}
return 0;
}
