From: Iucha, Florin <florin.iucha@amd.com>
Date: Wed, 12 Dec 2018 18:30:47 GMT
Subject: RE: High locking contention during repack?
Message-ID: <SN1PR12MB2384587486B6D10F2784CEB795A70@SN1PR12MB2384.namprd12.prod.outlook.com>
In-Reply-To: <SN1PR12MB2384362EE5BA4980322931B795A70@SN1PR12MB2384.namprd12.prod.outlook.com>

It seems to be spending a lot of time in create_delta. I have added a breakpoint on calling create_delta and a few good minutes pass between the breakpoint being hit. The large loop in create_delta has practically no outgoing function calls (save for the realloc on line 476), so I still don't understand how dstat could report 0% user time. htop indicates the worker threads are using 100% CPU time.

florin