> Date: Thursday, June 21, 2018 20:06:16 +0200 > From: Jørn <apache2.user@xxxxxxxxxxxxxxxx> > > On Thursday, June 21, 2018 08:11:02 Gryzli Bugbear wrote: >> Hi, >> >> Maybe you should first find where the slowness come from (most >> probably it is php, rather than Apache). > > That was in my mind, but tests show that PHP is much faster on the > new server than on the old one. PHP 7 is by nature faster than PHP > 5.x and the since the new server is much more powerfull (8 cores > vs 2 and higher cpu and memory frequency). > > There is not much to do for the PHP code to render the thumbnails. > It just get the image identifier from the URL, looks up in the > database and based on the answer from the database, it read a > small file from the disk and return it to the client. > > But to be sure, I added timers to check the speed of the code. It > confirm that the PHP code itself IS much faster on the new server. > > The old server is a dual core AMD @ 800 Mhz CPU speed. > The new server is a 8 core AMD @ 4 Ghz CPU speed. > What are the rated data transfer rates of the disks on the two machines? While the new machine's disks *should* be at least as fast, there are a range of variables and so no guarantee. As a basic test, try simple file transfers (e.g., using scp) between these two machines and a third one. Do both large files, and groups of small ones. You need to keep as many variables as possible constant in the test - e.g., same network connectivity from these servers to testing machine, etc. --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx
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