SQL Server Blocking: What the Head Blocker Does Not Tell You
Read OriginalThis article discusses SQL Server blocking chains and the head blocker's role in diagnosing application performance issues. It clarifies that blocking is normal concurrency behavior, but becomes problematic when transaction duration or wait times affect users. The head blocker shows where waiting begins, not the root cause, as it may be running normal transactions or idle with open locks. The article emphasizes analyzing transaction timing and context over simply identifying the blocking session, providing insights for DBAs and developers dealing with SQL Server performance troubleshooting.
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