| Hello, I’ve got the following setup, each application on its own virtual machine: Client (sends http-requests to proxy)—> Squid (sends http-requests to apache based on destination IP and round robin to multiple apache machines) —> Apache (setting up a two way ssl to the requested server) —> HTTPS-server This setup works great, and I have the Apache and the HTTPS-server its performance tuned. Both can handle 2000 concurrent connections of file sizes up to 10MB. Unfortunately I haven’t been successful with the Squid-server. After a while I’m getting the following error messages in the log: 1429432828.200 62854 10.10.7.16 TCP_MISS_ABORTED/000 0 GET http://https.example.com/index.html - ROUNDROBIN_PARENT/192.168.0.20 - The Squid virtual machine contains the following: CentOS 7.1 with latest updates Squid Cache: Version 3.3.8 CPU: Intel Xeon E312xx (Sandy Bridge) - 1799.998 MHz (4 cores) Memory: 4096 MiB Harddisk: 10 GiB, SCSI, raw, cache none When I execute a performance test with 2000 concurrent connections handling a file size of 10KB on each request. # ab -n 10000 -c 2000 -X 10.10.7.15:3128 http://https.example.com/index.html This is ApacheBench, Version 2.3 <$Revision: 1430300 $> Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/ Licensed to The Apache Software Foundation, http://www.apache.org/ Benchmarking https.rinis.nl [through 10.10.7.15:3128] (be patient) Completed 1000 requests Completed 2000 requests Completed 3000 requests Completed 4000 requests Completed 5000 requests Completed 6000 requests Completed 7000 requests Completed 8000 requests apr_pollset_poll: The timeout specified has expired (70007) Total of 8610 requests completed I have the command "vmstat 5” running on the squid server: procs -----------memory---------- ---swap-- -----io---- -system-- ------cpu----- r b swpd free buff cache si so bi bo in cs us sy id wa st 2 0 0 3823916 764 124992 0 0 519 26 237 503 2 3 92 3 0 0 0 0 3823744 764 125072 0 0 0 0 44 79 0 0 100 0 0 0 0 0 3823776 764 125044 0 0 0 2 39 70 0 0 100 0 0 0 0 0 3729540 764 139116 0 0 1 0 2145 257 1 2 97 0 0 0 0 0 3728432 764 139888 0 0 0 46 2297 594 1 1 97 0 0 0 0 0 3726484 764 140892 0 0 0 39 2869 581 2 1 97 0 0 0 0 0 3725528 764 141376 0 0 0 0 2843 648 2 2 96 0 0 0 0 0 3724980 764 142008 0 0 0 69 2824 529 2 1 97 0 0 0 0 0 3724584 764 142540 0 0 0 0 2742 472 2 1 97 0 0 0 0 0 3723696 764 143004 0 0 0 0 2511 577 2 1 97 0 0 0 0 0 3722840 764 143200 0 0 0 12 884 228 1 1 99 0 0 0 0 0 3722704 764 142900 0 0 0 0 136 127 0 0 100 0 0 0 0 0 3722504 764 142744 0 0 0 0 40 70 0 0 100 0 0 0 0 0 3722456 764 142784 0 0 0 114 37 68 0 0 100 0 0 0 0 0 3722208 764 142832 0 0 0 0 41 68 0 0 100 0 0 0 0 0 3722480 764 142280 0 0 0 0 179 82 0 0 100 0 0 0 0 0 3722544 764 142140 0 0 0 7 41 75 0 0 100 0 0 procs -----------memory---------- ---swap-- -----io---- -system-- ------cpu----- r b swpd free buff cache si so bi bo in cs us sy id wa st 1 0 0 3722544 764 142136 0 0 0 0 36 67 0 0 100 0 0 0 0 0 3722996 764 141552 0 0 0 0 42 75 0 0 100 0 0 0 0 0 3722980 764 141568 0 0 0 0 37 68 0 0 100 0 0 0 0 0 3723028 764 141524 0 0 0 0 36 66 0 0 100 0 0 0 0 0 3736816 764 130352 0 0 0 0 809 114 0 0 99 0 0 0 0 0 3737544 764 130268 0 0 0 41 42 74 0 0 100 0 0 It looks like the hardware has enough resources during the benchmark test. I’ve got the following squid.conf running: cache_peer 192.168.0.18 parent 3128 0 round-robin no-query no-digest cache_peer 192.168.0.20 parent 3128 0 round-robin no-query no-digest acl development_net dst 192.168.0.0/24 cache_peer_access 192.168.0.18 allow development_net cache_peer_access 192.168.0.20 allow development_net never_direct allow all cache deny all maximum_object_size_in_memory 16 MB cache_mem 2048 MB The squid must not cache at all. Any help is welcome. Abdelouahed |
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