[teiid-issues] [JBoss JIRA] (TEIID-3443) wrong estimation of BufferFrontedFileStoreCache.maxMemoryBlocks

wrong estimation of BufferFrontedFileStoreCache.maxMemoryBlocks --------------------------------------------------------------- Key: TEIID-3443 URL: https://issues.jboss.org/browse/TEIID-3443 Project: Teiid Issue Type: Bug Components: Query Engine Affects Versions: 8.4, 8.10 Environment: JDV 6.0.x, 6.1.0 Reporter: Hisanobu Okuda Assignee: Steven Hawkins Fix For: 8.7.1.6_2, 8.11 BufferFrontedFileStoreCache.maxMemoryBlocks is under-estimated. For example, when max-storage-object-size=8000000, maxMemoryBlocks is 488 at the line #575 in org.teiid.common.buffer.impl.BufferFrontedFileStoreCache.initialize() (after that, it is decrimented some times, but it does not matter). {code} main[1] run > Breakpoint hit: "thread=MSC service thread 1-3", org.teiid.common.buffer.impl.BufferFrontedFileStoreCache.initialize(), line=573 bci=163 573 maxMemoryBlocks = Math.min(maxMemoryBlocks, maxStorageObjectSize>>LOG_BLOCK_SIZE + ((maxStorageObjectSize&BufferFrontedFileStoreCache.BLOCK_MASK)>0?1:0)); MSC service thread 1-3[1] next > Step completed: "thread=MSC service thread 1-3", org.teiid.common.buffer.impl.BufferFrontedFileStoreCache.initialize(), line=575 bci=198 575 cleaningThreshold = Math.min(maxMemoryBlocks<<4, blocks>>1); MSC service thread 1-3[1] dump this this = { ...snip... maxStorageObjectSize: 8000000 ...snip... maxMemoryBlocks: 488 {code} An actual cache object size for maxMemoryBlocks: 488 is roughly:- {code} 8192 * 488 = 3997696 {code} It is less than half of maxStorageObjectSize. It sometimes causes TEIID30001.