getOLAPCacheEngineStat

getOLAPCacheEngineStat()

Alias: getCacheEngineStat

None

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).

getOLAPCacheEngineStat()