getOLAPCacheEngineStat
Syntax
getOLAPCacheEngineStat()
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. Note: 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 |