int ResManagerMainSegment2ndPhase(void)
{
int res = FUNC_RETURN_OK;
elog(DEBUG5, "HAWQ RM SEG is triggered.");
/* Register message handlers */
registerMessageHandler(REQUEST_QE_MOVETOCGROUP, handleQEMoveToCGroup);
registerMessageHandler(REQUEST_QE_MOVEOUTCGROUP, handleQEMoveOutCGroup);
registerMessageHandler(REQUEST_QE_SETWEIGHTCGROUP, handleQESetWeightCGroup);
registerMessageHandler(REQUEST_RM_INCREASE_MEMORY_QUOTA, handleRMIncreaseMemoryQuota);
registerMessageHandler(REQUEST_RM_DECREASE_MEMORY_QUOTA, handleRMDecreaseMemoryQuota);
registerMessageHandler(REQUEST_RM_TMPDIR, handleRMSEGRequestTmpDir);
registerMessageHandler(REQUEST_RM_RUALIVE, handleRMSEGRequestRUAlive);
/**************************************************************************
* New socket facility poll based server.
**************************************************************************/
res = initializeSocketServer_RMSEG();
if ( res != FUNC_RETURN_OK ) {
elog(LOG, "Fail to initialize socket server. Segment sleeps for ever.");
MainHandler_RMSEGDummyLoop();
}
initializeRMSEG2RMComm();
/*
* Resource enforcement: initialize, cleanup, and rebuild CGroup hash table
* when segment resource manager starts/restarts
*/
initCGroupThreads();
InitFileAccess();
/*
* Notify postmaster that HAWQ RM is ready. Ignore the possible problem that
* the parent process quits. HAWQ RM will automatically detect if its parent
* dies, then HAWQ RM should exit normally.
*/
kill(DRMGlobalInstance->ParentPID, SIGUSR2);
elog(LOG, "HAWQ RM SEG process works now.");
/* Start request handler to provide services. */
res = MainHandlerLoop_RMSEG();
elog(RMLOG, "HAWQ RM SEG server goes into exit phase.");
return res;
}
/*
* Early initialization of a backend (either standalone or under postmaster).
* This happens even before InitPostgres.
*
* This is separate from InitPostgres because it is also called by auxiliary
* processes, such as the background writer process, which may not call
* InitPostgres at all.
*/
void
BaseInit(void)
{
/*
* Attach to shared memory and semaphores, and initialize our
* input/output/debugging file descriptors.
*/
InitCommunication();
DebugFileOpen();
/* Do local initialization of file, storage and buffer managers */
InitFileAccess();
smgrinit();
InitBufferPoolAccess();
}