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<div class="moz-cite-prefix">If this is related to the async thread
pool, you could increase the number of async threads. Since the
async threads have no shared job queue, long filesystem blocking
can cause async threads to accumulate jobs, and the only option is
to increase the number of threads (despite the CPU/core count) if
you have variable latency with filesystem use (which causes async
threads to get clogged up unpredictably).<br>
<br>
On 05/17/2016 11:37 PM, Max Lapshin wrote:<br>
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<blockquote
cite="mid:CAMxVRxBjcVSCfmoXTm24mfTGj4MKUvkiwvMN8ni6ZkFRwA6SHg@mail.gmail.com"
type="cite">
<div dir="ltr">We have been hunting a performance bug on customer
installation during some time and have found that group of
processes (about 300) each hour (when new archive file is
opened) got locked with following stacktrace:
<div><br>
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<p class=""><span class="">[{gen,do_call,4,[{file,"gen.erl"},{line,168}]},</span></p>
<p class=""><span class=""> {gen_server,call,3,[{file,"gen_server.erl"},{line,208}]},</span></p>
<p class=""><span class=""> {file,call,2,[{file,"file.erl"},{line,1487}]},</span></p>
<p class=""><span class=""> {filelib,do_is_dir,2,[{file,"filelib.erl"},{line,130}]},</span></p>
<p class=""><span class=""> {filelib,ensure_dir,1,[{file,"filelib.erl"},{line,231}]},</span></p>
<p class=""><span class=""> {dvr_hour_storage,append1,2,...</span></p>
<p class=""><span class=""><br>
</span></p>
<p class=""><span class=""><br>
</span></p>
<p class=""><span class="">Just a friendly reminder that most
of file access functions are called via singleton process.</span></p>
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