/**
* Get Mondrian Stats
*
* @summary Get Mondrian stats
* @return A selection of Mondrian stats.
*/
@GET
@Produces({"application/json"})
@Path("/mondrian")
public MondrianStats getMondrianStats() {
MondrianServer mondrianServer = MondrianServer.forId(null);
if (mondrianServer != null) {
MondrianVersion mv = mondrianServer.getVersion();
final Monitor monitor = mondrianServer.getMonitor();
final ServerInfo server = monitor.getServer();
int statementCurrentlyOpenCount = 0; // server.statementCurrentlyOpenCount();
int connectionCurrentlyOpenCount = 0; // server.connectionCurrentlyOpenCount();
int sqlStatementCurrentlyOpenCount = 0; // server.sqlStatementCurrentlyOpenCount();
int statementCurrentlyExecutingCount = 0; // server.statementCurrentlyExecutingCount();
float avgCellDimensionality = ((float) server.cellCoordinateCount / (float) server.cellCount);
final List<ConnectionInfo> connections = monitor.getConnections();
final List<StatementInfo> statements = monitor.getStatements();
return new MondrianStats(
server,
mv,
statementCurrentlyOpenCount,
connectionCurrentlyOpenCount,
sqlStatementCurrentlyOpenCount,
statementCurrentlyExecutingCount,
avgCellDimensionality,
connections,
statements);
}
return null;
}
/**
* Exercises as many fields of the monitoring stats classes as possible. So that we can check that
* they are being populated.
*/
public void testMe() throws SQLException {
String queryString =
"WITH MEMBER [Measures].[Foo] AS\n"
+ " [Measures].[Unit Sales]"
+ " + case when [Measures].[Unit Sales] > 0\n"
+ " then CInt( ([Measures].[Foo], [Time].PrevMember) )\n"
+ " end\n"
+ "SELECT [Measures].[Foo] on 0\n"
+ "from [Sales]\n"
+ "where [Time].[1997].[Q3].[9]";
final OlapStatement statement1 = getTestContext().getOlap4jConnection().createStatement();
CellSet cellSet = statement1.executeOlapQuery(queryString);
StringWriter stringWriter = new StringWriter();
new RectangularCellSetFormatter(true).format(cellSet, new PrintWriter(stringWriter));
statement1.close();
println(stringWriter);
final MondrianServer mondrianServer = MondrianServer.forConnection(getConnection());
final Monitor monitor = mondrianServer.getMonitor();
final ServerInfo server = monitor.getServer();
println("# stmts open: " + server.statementCurrentlyOpenCount());
println("# connections open: " + server.connectionCurrentlyOpenCount());
println("# rows fetched: " + server.sqlStatementRowFetchCount);
println("# sql stmts open: " + server.sqlStatementCurrentlyOpenCount());
// # sql stmts by category (cell query, member query, other)
// -- if you want to do this, capture sql statement events
// cell cache requests
// cell cache misses
// cell cache hits
final List<ConnectionInfo> connections = monitor.getConnections();
ConnectionInfo lastConnection = connections.get(connections.size() - 1);
final List<StatementInfo> statements = monitor.getStatements();
StatementInfo lastStatement = statements.get(statements.size() - 1);
println(
"# cell cache requests, misses, hits; "
+ "by server, connection, mdx statement: "
+ server.cellCacheRequestCount
+ ", "
+ server.cellCacheMissCount()
+ ", "
+ server.cellCacheHitCount
+ "; "
+ lastConnection.cellCacheRequestCount
+ ", "
+ (lastConnection.cellCacheRequestCount - lastConnection.cellCacheHitCount)
+ ", "
+ lastConnection.cellCacheHitCount
+ "; "
+ lastStatement.cellCacheRequestCount
+ ", "
+ lastStatement.cellCacheMissCount
+ ", "
+ lastStatement.cellCacheHitCount);
// cache misses in the last minute
// cache hits in the last minute
// -- build a layer on top of monitor that polls say every 15 seconds,
// and keeps results for a few minutes
println("number of mdx statements currently open: " + server.statementCurrentlyOpenCount());
println(
"number of mdx statements currently executing: "
+ server.statementCurrentlyExecutingCount());
println(
"jvm memory: "
+ server.jvmHeapBytesUsed
+ ", max: "
+ server.jvmHeapBytesMax
+ ", committed: "
+ server.jvmHeapBytesCommitted);
println(
"number of segments: "
+ server.segmentCount
+ ", ever created: "
+ server.segmentCreateCount
+ ", number of cells: "
+ server.cellCount
+ ", number of cell coordinates: "
+ server.cellCoordinateCount
+ ", average cell dimensionality: "
+ ((float) server.cellCoordinateCount / (float) server.cellCount));
println("Statement: " + lastStatement);
println("Connection: " + lastConnection);
println("Server: " + server);
// number of mdx function calls cumulative
// how many operations have been evaluated in sql?
// number of members in cache
// number of cells in segments
// mdx query time
// sql query time
// sql rows
// olap4j connection pool size
// sql connection pool size
// thread count
// # schemas in schema cache
// cells fulfilled by sql statements
// mondrian server count (other stats relate to just one server)
//
// Events:
//
// SQL statement start
// SQL statment stop
// external cache call
// sort
// (other expensive operations similar to sort?)
}