SQL server 2012 Enterprise problems

Question

Hello to Everybody!
In my company we are using the evaluating version of SQL server 2012 Enterprise. We have installed the DB into a Windows server 2008 R2 64bit with RAM 32GB and Intel Xeon CPU E5-2620 (2 processors).
We access the SQL db with a PLM software to manage materials and components codifications.
Our users tell me that every hour ca the system freeze and remains blocked for about a minute or two. Then the block passes and the situation becames normal again. Users don't lost the work began before the block and can continue to work after it.
Did you have already heard something like this? How can we solve?
Thank you in advice

Answer 1

Hi, the query that you wrote give me no output result.
I've found that query by googling:
WITH Waits AS
SELECT
wait_type,
wait_time_ms /1000. AS wait_time_s,
100. * wait_time_ms / SUM(wait_time_ms)OVER()AS pct,
ROW_NUMBER() OVER(ORDER BY wait_time_ms DESC) AS rn
FROM sys.dm_os_wait_stats
WHERE wait_type NOT IN ('CLR_SEMAPHORE','LAZYWRITER_SLEEP','RESOURCE_QUEUE','SLEEP_TASK'
,'SLEEP_SYSTEMTASK','SQLTRACE_BUFFER_FLUSH','WAITFOR', 'LOGMGR_QUEUE','CHECKPOINT_QUEUE'
,'REQUEST_FOR_DEADLOCK_SEARCH','XE_TIMER_EVENT','BROKER_TO_FLUSH','BROKER_TASK_STOP','CLR_MANUAL_EVENT'
,'CLR_AUTO_EVENT','DISPATCHER_QUEUE_SEMAPHORE', 'FT_IFTS_SCHEDULER_IDLE_WAIT'
,'XE_DISPATCHER_WAIT','SQLTRACE_INCREMENTAL_FLUSH_SLEEP', 'XE_DISPATCHER_JOIN')
--filter out additional irrelevant waits
SELECT
W1.wait_type,
CAST(W1.wait_time_s AS DECIMAL(12,2))AS wait_time_s,
CAST(W1.pct AS DECIMAL(12,2))AS pct,
CAST(SUM(W2.pct)AS DECIMAL(12,2))AS running_pct
FROM Waits AS W1
JOIN Waits AS W2
ON W2.rn<= W1.rn
GROUP BY W1.rn, W1.wait_type, W1.wait_time_s, W1.pct
HAVING SUM(W2.pct)-W1.pct < 90-- percentage threshold
ORDER BY W1.rn;
and this is the result:
wait_type                                                  
|| wait_time_s || pct    || runnin_pct
DIRTY_PAGE_POLL                                      || 75353.38   
|| 25.88 || 25.88
HADR_FILESTREAM_IOMGR_IOCOMPLETION || 75318.46    || 25.87 || 51.75
SP_SERVER_DIAGNOSTICS_SLEEP               || 75300.18    || 25.86 || 77.61
BROKER_EVENTHANDLER                            || 60750.52    || 20.87 || 98.48
I have also an image about Activity Monitor in SQL management Studio but i cannot upload picture: I have to verify my Microsoft account but i don't know how to do it.