I currently have only Europe in the database plus contours. Rendering is fairly quick, even on the levels with contours. But when a tirex-master is running, apache becomes very slow. Not just mod_tile serving cached tiles, but also the web fronted of munin (e.g.).

System: Hardware: IBM Blade x3650, 16 Cores Octa 2.4, 54GB Ram, 500GB SSDs, 5TB Raid HDs. Software: Debian Jessie, postgres 9.4, Mapnik 3.0.4, apache 2.4, latest postgis, mod_tile, tirex, etc.

Any pointers would be appreciated!

asked 16 Sep '15, 17:20

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cmyk
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Can you at least narrow it down to whether it is CPU or I/O related? top should provide this information.

(16 Sep '15, 17:43) scai ♦

CPU is not it. It's at 500% with 10 Cores. And I/O (iotop) doesn't look like it's bottlenecked.

top - 18:54:50 up 5 days, 10:04, 4 users, load average: 6.44, 6.24, 4.83 Tasks: 84 total, 7 running, 77 sleeping, 0 stopped, 0 zombie %Cpu(s): 50.1 us, 12.8 sy, 0.0 ni, 37.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st KiB Mem: 56623104 total, 55610008 used, 1013096 free, 0 buffers KiB Swap: 1228800 total, 522032 used, 706768 free. 26371032 cached Mem

(16 Sep '15, 17:53) cmyk
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question asked: 16 Sep '15, 17:20

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last updated: 16 Sep '15, 17:56

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