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Cannot Attach Data Store Shared-memory Segment Timesten

Application unresponsive, appears hung This section describes what to check if your application is unresponsive and appears to be hung. Complete the following tasks: Use the ttIsql dssize command to check TEMP_IN_USE_SIZE and TEMP_IN_USE_HIGH_WATER. (Alternatively, you can query the SYS.MONITOR table for these values.) Call the ttMonitorHighWaterReset procedure to reset the Examples of SQLError usage can be found in the demo programs and in "Retrieving errors and warnings" in the Oracle TimesTen In-Memory Database Error Messages and SNMP Traps. TimesTen Server failed Check the server's log file. his comment is here

Join Now I want to fix my crash I want to help others java.sql.SQLException: [TimesTen][TimesTen ODBC Driver][TimesTen]TT0837: Cannot attach data store shared-memory segment, error 8 -- file "db.c", lineno 9415, As a result, the maximum TimesTen database size one can allocate is much smaller on the Windows platform than on other platforms. - Windows error 8 means ERROR_NOT_ENOUGH_MEMORY: not enough storage Use ttMigrate -c to create a migration file. The output from ttDaemonAdmin shows whether the daemon is already running. https://community.oracle.com/thread/414366

On UNIX systems, use commands similar to the following: ipcs -ma to check if you have other shared memory segments using up memory, such as Oracle instances or other instances of See "ERR tracing" for details. If desired, disable incremental backups and do full backups instead.

As a practical matter this means that TimesTen direct-mode in Windows 32-bit is challenging to use for those with complex applications. It is important to determine which operation is putting a "hold" on the transaction log files, so that appropriate action can be taken to allow the transaction log files to be You can also use the ttXactAdmin utility to detect the types of locks currently held by uncommitted transactions and the resources on which they are being held. If you later populate your tables with millions of rows and then execute the queries, the plans that worked well for the situation where your tables contained few rows may now

Check path name to data store To ensure that you are always accessing the same data store when connecting to a particular DSN, use an absolute data store path name instead Check memory used by queries You can check the memory that a query uses by observing the high water mark for temporary memory usage. ps -eafl to see how much memory is being used by running processes. https://onenesta.wordpress.com/2010/04/14/timesten-cannot-attach-data-store-shared-memory-segment-using-jdbc-tt0837/ Look for a line in the output that shows a path for the daemon home directory: TimesTen Release (ttuser:40732) 2007-04-04T17:53:04Z Instance admin: ttuser Instance home directory: /node1/ttuser/ttcur/TTBuild/linux86_dbg/install Daemon home directory: /node1/ttuser/ttcur/TTBuild/linux86_dbg/install/info

After that my Java app fails to connect with the following message: DriverManager.getConnection("jdbc:timesten:direct:dsn=rundata_tt60;OverWrite=0;threadsafe=1;durablecommits=0") trying driver[className=com.timesten.jdbc.TimesTenDriver,[email protected]] SQLException: SQLState(08001) vendor code(837) java.sql.SQLException: [TimesTen][TimesTen 6.0.4 ODBC Driver][TimesTen]TT0837: Cannot attach data store shared-memory segment, error TimesTen Client loses connection with TimesTen Server Check to see if the error was due to the Client timing out. If NLS_LANG is set to an unsupported value, such as NA, an OCI connection failed error or an ORA-12705 error is thrown. Alternatively, you may need to partition your data into several different data stores if, for example, you cannot shrink the temporary segment or create a bigger data store because of limits

The shmat man page lists the possibilities. To execute some queries, TimesTen needs to allocate temporary space. Use -m to remove a shared memory segment. Double click the ODBC icon.

For example, if you update statistics on a table before populating it with data, then your queries are optimized with the assumption that the tables contain no rows (or very few). http://gpscheduler.com/cannot-attach/cannot-attach-pl-sql-shared-memory.html If you are still having problems with your data store after following the troubleshooting recommendations in this chapter, please contact Technical support. Ensure that you are using the ttDaemonAdmin utility to start the daemon. Join us to help others who have the same bug.

Other OSes avoid this by densely packing shared libraries. This will move the datastore out of the Java process address space therby allowing for a larger datastore at the cost of a large reduction in performance. 3. You can also generate a trace log to detect the activities on various TimesTen components as described in"Using the ttTraceMon utility" . http://gpscheduler.com/cannot-attach/cannot-attach-data-store-shared-memory-segment-error-12.html Call SQLError after each ODBC call to identify error or warning conditions when they first happen.

Check that the TimesTen daemon is running If the TimesTen daemon or Data Manager service is not running, an attempt to connect to a data store generates TimesTen error 799 (Unable Semaphore limits are platform-dependent. In this case the system error code is EMFILE.

For example, if the demo data store is in the datastore directory, specify: DataStore=/datastore/demo rather than: DataStore=demo In the latter case, the data store path name is relative to the directory

Cannot attach PL/SQL shared memory You can receive error 8517 "Cannot attach PL/SQL shared memory; PLSQL_MEMORY_ADDRESS not valid or already in use" for any of the following reasons: User allocated memory See "Starting and stopping the Oracle TimesTen Data Manager service on Windows" in the Oracle TimesTen In-Memory Database Operations Guide for information about starting the server manually. Permanent segment filling up Consider whether you can drop any indexes. The ipcrm command cannot free the shared memory until the processes detach from the segment or exit.

In other words it moves a row from one position in the index to another position. Try using local client/server via SHMIPC connectivity. For more information about file descriptor limits, see "System Limits" in the Oracle TimesTen In-Memory Database Reference. check over here The high water mark represents the largest amount of in-use temporary space used since the high water mark was initialized or reset.

Check trace settings Use ttTraceMon -e show as described in "Using the ttTraceMon utility" to confirm tracing is off on all TimesTen components. Ideas..anyone? /Peter 5753Views Tags: none (add) This content has been marked as final. On UNIX or Linux systems, the shmat call can fail due to one of: - The application does not have access to the shared memory segment. Each checkpoint file can grow on disk to be equivalent to the size of the data store in shared memory.

For large C/C++ applications one can usually "rebase" DLLs to reduce fragmentation. To verify the TimesTen Server: On the Windows Desktop, choose Start > Settings > Control Panel. However, it needs additional information about the tables involved in complex queries in order to choose the best plan. Out of space when DSN specifies new data store You may receive "out of space" messages if you change a DSN to specify a new data store while there are existing

Use the ttStatus utility as described in "Check the TimesTen user error log" to check the status of the TimesTen daemon. This causes a new server process to be created for connections to the data store that is now specified in the DSN. For each permanent data store, you must have enough disk space for the two checkpoint files and for transaction log files.