Varnish 4 Performance Issues
Guillaume Quintard
guillaume at varnish-software.com
Wed Sep 26 15:16:16 UTC 2018
Getting a lot of Hit-for-Pass?
Are you doing something like setting the ttl to 0s by any chance?
--
Guillaume Quintard
On Wed, Sep 26, 2018 at 4:55 PM Junaid Mukhtar <junaid.mukhtar at gmail.com>
wrote:
> Interestingly we are seeing a lot of time in WaitingList before going to
> VCL Fetch
>
> - VCL_return hash
> - VCL_call HASH
> - VCL_return lookup
> - Timestamp Waitinglist: 1537973412.501378 2.410131 2.409963
> - VCL_call MISS
> - VCL_return fetch
> - Link bereq 22354816 fetch
> - Timestamp Fetch: 1537973412.505995 2.414748 0.004617
>
>
> --------
> Regards,
> Junaid
>
>
> On Wed, Sep 26, 2018 at 9:31 AM Junaid Mukhtar <junaid.mukhtar at gmail.com>
> wrote:
>
>> I totally agree about that.
>>
>> what we have figured out is that during the steady periods of performance
>> tests it run absolutely fine; but as soon as we spike up the traffic
>> (double the normal peak) performance degrades dramatically.
>>
>>
>> --------
>> Regards,
>> Junaid
>>
>>
>> On Tue, Sep 25, 2018 at 5:17 PM Guillaume Quintard <
>> guillaume at varnish-software.com> wrote:
>>
>>> without the vcl (and/or logs, but I'm assuming those are even more
>>> confidential), that's a tough cookie to debug
>>> --
>>> Guillaume Quintard
>>>
>>>
>>> On Mon, Sep 24, 2018 at 10:35 AM Junaid Mukhtar <
>>> junaid.mukhtar at gmail.com> wrote:
>>>
>>>> Hi
>>>>
>>>> Apologies but I am not allowed to share the VCL. If there's any other
>>>> thing like stats etc that might be helpful then do let me know
>>>>
>>>> --------
>>>> Regards,
>>>> Junaid
>>>>
>>>>
>>>> On Fri, Sep 21, 2018 at 4:15 PM Guillaume Quintard <
>>>> guillaume at varnish-software.com> wrote:
>>>>
>>>>> would you be able to share your vcl?
>>>>> --
>>>>> Guillaume Quintard
>>>>>
>>>>>
>>>>> On Fri, Sep 21, 2018 at 4:54 PM Junaid Mukhtar <
>>>>> junaid.mukhtar at gmail.com> wrote:
>>>>>
>>>>>> Any help guys; this is really getting to us.....
>>>>>>
>>>>>> --------
>>>>>> Regards,
>>>>>> Junaid
>>>>>>
>>>>>>
>>>>>> On Thu, Sep 20, 2018 at 3:57 PM Junaid Mukhtar <
>>>>>> junaid.mukhtar at gmail.com> wrote:
>>>>>>
>>>>>>>
>>>>>>> This is what we get in varnishhist
>>>>>>>
>>>>>>> 280_
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> |
>>>>>>> 230_ |
>>>>>>> |
>>>>>>> |
>>>>>>> |
>>>>>>> |
>>>>>>> 180_ |
>>>>>>> ||
>>>>>>> ||
>>>>>>> |||
>>>>>>> |||
>>>>>>> 130_ |||
>>>>>>> |||
>>>>>>> ||||||
>>>>>>> ||||||
>>>>>>> ||||||
>>>>>>> 80_ ||||||
>>>>>>>
>>>>>>> |||||| #
>>>>>>>
>>>>>>> |||||| ###
>>>>>>>
>>>>>>> ||||||| # ###
>>>>>>>
>>>>>>> ||||||||| ##### #
>>>>>>> 30_
>>>>>>> ||||||||| ########
>>>>>>>
>>>>>>> |||||||||
>>>>>>> #########
>>>>>>>
>>>>>>> ||||||||||
>>>>>>> ###########
>>>>>>>
>>>>>>> |||||||||||| ## #
>>>>>>> ############# #
>>>>>>>
>>>>>>> +---------------------+---------------------+---------------------+---------------------+---------------------+---------------------+---------------------+---------------------+---------------------
>>>>>>> |1e-6 |1e-5 |1e-4
>>>>>>> |1e-3 |1e-2 |1e-1
>>>>>>> |1e0 |1e1 |1e2
>>>>>>> --------
>>>>>>> Regards,
>>>>>>> Junaid
>>>>>>>
>>>>>>>
>>>>>>> On Thu, Sep 20, 2018 at 3:54 PM Junaid Mukhtar <
>>>>>>> junaid.mukhtar at gmail.com> wrote:
>>>>>>>
>>>>>>>> Below is the output; all of them are default except i was trying to
>>>>>>>> up the threads_pool to 4 but didn't feel any imporvement in performance
>>>>>>>> degradation
>>>>>>>>
>>>>>>>> accept_filter off [bool] (default)
>>>>>>>> acceptor_sleep_decay 0.9 (default)
>>>>>>>> acceptor_sleep_incr 0.000 [seconds] (default)
>>>>>>>> acceptor_sleep_max 0.050 [seconds] (default)
>>>>>>>> auto_restart on [bool] (default)
>>>>>>>> backend_idle_timeout 60.000 [seconds] (default)
>>>>>>>> ban_dups on [bool] (default)
>>>>>>>> ban_lurker_age 60.000 [seconds] (default)
>>>>>>>> ban_lurker_batch 1000 (default)
>>>>>>>> ban_lurker_sleep 0.010 [seconds] (default)
>>>>>>>> between_bytes_timeout 60.000 [seconds] (default)
>>>>>>>> cc_command "exec gcc -std=gnu99 -O2 -g
>>>>>>>> -Wp,-D_FORTIFY_SOURCE=0 -Wall -Werror -pthread -fpic -shared -Wl,-x -o %o
>>>>>>>> %s" (default)
>>>>>>>> cli_buffer 8k [bytes] (default)
>>>>>>>> cli_limit 48k [bytes] (default)
>>>>>>>> cli_timeout 60.000 [seconds] (default)
>>>>>>>> clock_skew 10 [seconds] (default)
>>>>>>>> clock_step 1.000 [seconds] (default)
>>>>>>>> connect_timeout 3.500 [seconds] (default)
>>>>>>>> critbit_cooloff 180.000 [seconds] (default)
>>>>>>>> debug none (default)
>>>>>>>> default_grace 10.000 [seconds] (default)
>>>>>>>> default_keep 0.000 [seconds] (default)
>>>>>>>> default_ttl 120.000 [seconds] (default)
>>>>>>>> feature none (default)
>>>>>>>> fetch_chunksize 16k [bytes] (default)
>>>>>>>> fetch_maxchunksize 0.25G [bytes] (default)
>>>>>>>> first_byte_timeout 60.000 [seconds] (default)
>>>>>>>> gzip_buffer 32k [bytes] (default)
>>>>>>>> gzip_level 6 (default)
>>>>>>>> gzip_memlevel 8 (default)
>>>>>>>> http_gzip_support on [bool] (default)
>>>>>>>> http_max_hdr 64 [header lines] (default)
>>>>>>>> http_range_support on [bool] (default)
>>>>>>>> http_req_hdr_len 8k [bytes] (default)
>>>>>>>> http_req_size 32k [bytes] (default)
>>>>>>>> http_resp_hdr_len 8k [bytes] (default)
>>>>>>>> http_resp_size 32k [bytes] (default)
>>>>>>>> idle_send_timeout 60.000 [seconds] (default)
>>>>>>>> listen_depth 1024 [connections] (default)
>>>>>>>> lru_interval 2.000 [seconds] (default)
>>>>>>>> max_esi_depth 5 [levels] (default)
>>>>>>>> max_restarts 4 [restarts] (default)
>>>>>>>> max_retries 4 [retries] (default)
>>>>>>>> nuke_limit 50 [allocations] (default)
>>>>>>>> pcre_match_limit 10000 (default)
>>>>>>>> pcre_match_limit_recursion 20 (default)
>>>>>>>> ping_interval 3 [seconds] (default)
>>>>>>>> pipe_timeout 60.000 [seconds] (default)
>>>>>>>> pool_req 10,100,10 (default)
>>>>>>>> pool_sess 10,100,10 (default)
>>>>>>>> pool_vbo 10,100,10 (default)
>>>>>>>> prefer_ipv6 off [bool] (default)
>>>>>>>> rush_exponent 3 [requests per request] (default)
>>>>>>>> send_timeout 600.000 [seconds] (default)
>>>>>>>> session_max 100000 [sessions] (default)
>>>>>>>> shm_reclen 255b [bytes] (default)
>>>>>>>> shortlived 10.000 [seconds] (default)
>>>>>>>> sigsegv_handler on [bool] (default)
>>>>>>>> syslog_cli_traffic on [bool] (default)
>>>>>>>> tcp_fastopen off [bool] (default)
>>>>>>>> tcp_keepalive_intvl 75.000 [seconds] (default)
>>>>>>>> tcp_keepalive_probes 9 [probes] (default)
>>>>>>>> tcp_keepalive_time 7200.000 [seconds] (default)
>>>>>>>> thread_pool_add_delay 0.000 [seconds] (default)
>>>>>>>> thread_pool_destroy_delay 1.000 [seconds] (default)
>>>>>>>> thread_pool_fail_delay 0.200 [seconds] (default)
>>>>>>>> thread_pool_max 5000 [threads] (default)
>>>>>>>> thread_pool_min 100 [threads] (default)
>>>>>>>> thread_pool_reserve 0 [threads] (default)
>>>>>>>> thread_pool_stack 48k [bytes] (default)
>>>>>>>> thread_pool_timeout 300.000 [seconds] (default)
>>>>>>>> thread_pools 2 [pools] (default)
>>>>>>>> thread_queue_limit 20 (default)
>>>>>>>> thread_stats_rate 10 [requests] (default)
>>>>>>>> timeout_idle 5.000 [seconds] (default)
>>>>>>>> timeout_linger 0.050 [seconds] (default)
>>>>>>>> vcc_allow_inline_c off [bool] (default)
>>>>>>>> vcc_err_unref on [bool] (default)
>>>>>>>> vcc_unsafe_path on [bool] (default)
>>>>>>>> vcl_cooldown 600.000 [seconds] (default)
>>>>>>>> vcl_dir /etc/varnish (default)
>>>>>>>> vmod_dir /usr/lib64/varnish/vmods (default)
>>>>>>>> vsl_buffer 4k [bytes] (default)
>>>>>>>> vsl_mask -VCL_trace,-WorkThread,-Hash,-VfpAcct
>>>>>>>> (default)
>>>>>>>> vsl_reclen 255b [bytes] (default)
>>>>>>>> vsl_space 80M [bytes] (default)
>>>>>>>> vsm_free_cooldown 60.000 [seconds] (default)
>>>>>>>> vsm_space 1M [bytes] (default)
>>>>>>>> workspace_backend 64k [bytes] (default)
>>>>>>>> workspace_client 64k [bytes] (default)
>>>>>>>> workspace_session 0.50k [bytes] (default)
>>>>>>>> workspace_thread 2k [bytes] (default)
>>>>>>>>
>>>>>>>>
>>>>>>>> --------
>>>>>>>> Regards,
>>>>>>>> Junaid
>>>>>>>>
>>>>>>>>
>>>>>>>> On Thu, Sep 20, 2018 at 3:37 PM Dridi Boukelmoune <dridi at varni.sh>
>>>>>>>> wrote:
>>>>>>>>
>>>>>>>>> On Thu, Sep 20, 2018 at 4:14 PM Junaid Mukhtar <
>>>>>>>>> junaid.mukhtar at gmail.com> wrote:
>>>>>>>>> >
>>>>>>>>> > Hi
>>>>>>>>> >
>>>>>>>>> > we are in middle of upgrading from varnish 3.0.7 to varnish
>>>>>>>>> 4.1.10; but unfortunately all of the response times in the performance test
>>>>>>>>> are indicating an increase of at least 100%
>>>>>>>>> >
>>>>>>>>> > We have analyzed the logs and everything but can't get around
>>>>>>>>> this; the issue is not only for the non-cached pages but it's also
>>>>>>>>> impacting the cached pages. We are also struggling to analyze it further as
>>>>>>>>> well, any guidenace as to what we can do in terms of putting debug logging
>>>>>>>>> in would be helpful.
>>>>>>>>> >
>>>>>>>>> > One of the areas we are considering is to output response times,
>>>>>>>>> but it's proving difficult for me. Any suggestions
>>>>>>>>>
>>>>>>>>> Hello,
>>>>>>>>>
>>>>>>>>> What is the output of `varnishadm param.show` ?
>>>>>>>>>
>>>>>>>>> Dridi
>>>>>>>>>
>>>>>>>> _______________________________________________
>>>>>> varnish-misc mailing list
>>>>>> varnish-misc at varnish-cache.org
>>>>>> https://www.varnish-cache.org/lists/mailman/listinfo/varnish-misc
>>>>>>
>>>>>
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