Hello, first of all, congratulations to Firebird 3.
I'm basically seeking for assistance pin-pointing an issue here with Firebird 3 SuperServer 32-bit on Windows 10 Prof., as it seems, in the context of the Trace API. This all is not an issue with Firebird 2.5. Unfortunately, it is only reproducible in FB TraceManager at the moment. I haven't been able to reproduce it with e.g. a mix of isql and fbtracemgr.exe for example. When starting a trace session with e.g. the following configuration: database = employee { enabled = true log_statement_prepare = true log_statement_free = true log_statement_finish = true log_procedure_finish = true log_trigger_finish = true print_plan = true print_perf = true log_function_finish = true exclude_filter = %RDB$% time_threshold = 0 max_sql_length = 2048 } services { } and triggering a few monitoring table queries behind the scene in a particular area of our product, a single thread in firebird.exe starts to fully utilize a single CPU core. When I start the trace session with an additional exclude_filter part %MON$%, the problem disappears. I guess not very helpful, but this is the stack trace of the high CPU offending thread in firebird.exe according to SysInternals process explorer. ntoskrnl.exe!KeSynchronizeExecution+0x3de6 ntoskrnl.exe!KeWaitForMultipleObjects+0x1320 ntoskrnl.exe!KeWaitForMultipleObjects+0xd38 ntoskrnl.exe!KeWaitForSingleObject+0x385 ntoskrnl.exe!KeTestAlertThread+0x1103 ntoskrnl.exe!KeSetCoalescableTimer+0x800 ntoskrnl.exe!KeSynchronizeExecution+0x2543 Engine12.DLL!firebird_plugin+0x6f7c5 Engine12.DLL!firebird_plugin+0xf9133 I'm afraid, not very helpful. :-( What else could I provide so that you can investigate the offending thread? I'm better in diagnosing JVM stuff than native. I'm aware, this all is vague and I would prefer a simple isql based test case as well, but I failed so far. Thanks, Thomas ------------------------------------------------------------------------------ Find and fix application performance issues faster with Applications Manager Applications Manager provides deep performance insights into multiple tiers of your business applications. It resolves application problems quickly and reduces your MTTR. Get your free trial! https://ad.doubleclick.net/ddm/clk/302982198;130105516;z Firebird-Devel mailing list, web interface at https://lists.sourceforge.net/lists/listinfo/firebird-devel