search for: dopageflush

...32KB. About 15% of the data, however, is done by fsflush and only 4 or 8KB at a time. The write throughput for the fsflush writes is about 10% that of the app writes (using the "DTIME" values and aggregating the results to get totals). CPU resources are not a bottleneck. If I turn off dopageflush the overall rate jumps to 18-20MB/s. However, this would mean that the file data may not get flushed for a very long time, so is not a suitable option for production environments. If I do a dd (to create a file of 1GB, the amount of system memory), even with a block size that matches our app, it...