Hi, To get a better understanding about the nature of remote calls being made to Mongo from Oak code I have modified the mongo java driver [1] to log details of calls being made through it along with time taken. To make use of that following steps would be required
A. Build forked driver code --------- $ git clone https://github.com/chetanmeh/mongo-java-driver.git $ cd mongo-java-driver $ git checkout tracer $ mvn clean install -DskipTests This would install the modified version of the driver to local maven repo. B. Use the modified build ---------- Modify the pom.xml of the module and change the version to org.mongodb:mongo-java-driver:2.10.2-SNAPSHOT C. Change log settings ---------- Update the <module>/src/test/resources/logback-test.xml to enable debug logs for following category <logger name="com.mongodb.DBPort" level="DEBUG" /> Run the testcase now and you should be able to see query logs as shown below ... 16:28:53.415 Request : Id: 11 (0 ms) OP_QUERY, { "getlasterror" : 1} 16:28:53.417 Request : Id: 12 (0 ms) OP_QUERY, [NODES] { "_id" : "1:/test"} 16:28:53.419 Request : Id: 13 (0 ms) OP_INSERT, [NODES] 16:28:53.420 Request : Id: 14 (1 ms) OP_QUERY, { "getlasterror" : 1} 16:28:53.421 Request : Id: 15 (0 ms) OP_INSERT, [NODES] 16:28:53.422 Request : Id: 16 (0 ms) OP_QUERY, { "getlasterror" : 1} 16:28:53.424 Request : Id: 17 (0 ms) OP_QUERY, [NODES] { "_id" : "1:/test"} 16:28:53.429 Request : Id: 18 (1 ms) OP_QUERY, [NODES] { "_id" : { "$gte" : "1:/" , "$lt" : "2:/"}} 16:28:53.433 Request : Id: 19 (1 ms) OP_QUERY, [NODES] { "_id" : { "$gte" : "2:/test/" , "$lt" : "3:/test/"}} This might help someone to make some sense of type of calls being performed Chetan Mehrotra [1] https://github.com/chetanmeh/mongo-java-driver/compare/tracer