getOLAPCacheEngineStat
Syntax
getOLAPCacheEngineStat()
Alias: getCacheEngineStat
Arguments
None
Details
Get the status of the OLAP cache engine on the current node. The function can only be called on the data node.
Return a table containing the following columns:
-
chunkId: the chunk ID.
-
physicalName: the physical name of the table to which the chunk belongs.
-
timeSinceLastWrite: the time elapsed (in milliseconds) since last write.
-
cachedRowsOfCompletedTxn: the number of cached records of completed transactions.
-
cachedRowsOfUncompletedTxn: the number of cached records of uncompleted transactions. For each chunk, only the last transaction may not have been completed.
-
cachedMemOfCompletedTxn: the memory usage (in Bytes) of completed transactions.
-
cachedMemOfUncompletedTxn: the memory usage (in Bytes) of uncompleted transactions.
-
cachedTids: list of transaction IDs (tid).
Examples
getOLAPCacheEngineStat()
chunkId | physicalName | timeSinceLastWrite | cachedRowsOfCompletedTxn | cachedRowsOfUncompletedTxn | cachedMemOfCompletedTxn | cachedMemOfUncompletedTxn | cachedTids |
---|---|---|---|---|---|---|---|
e4558d3c-fa41-52b5-418b-94e26cb70a75 | pt_2 | 1056 | 222,386 | 0 | 3,558,176 | 0 | 2052 |