Date: Wed, 15 May 2019 15:06:19 +0000 From: Rick Macklem <rmacklem@uoguelph.ca> To: Ganbold Tsagaankhuu <ganbold@gmail.com>, "freebsd-fs@freebsd.org" <freebsd-fs@freebsd.org> Subject: Re: NFS file access log Message-ID: <YQXPR0101MB22627D01AB3074DEED2B6DFCDD090@YQXPR0101MB2262.CANPRD01.PROD.OUTLOOK.COM> In-Reply-To: <CAGtf9xMr9hv%2BaT11r4ScyAvwzo1xubaKiwzp%2BFVjozh5QA=Bbw@mail.gmail.com> References: <CAGtf9xMr9hv%2BaT11r4ScyAvwzo1xubaKiwzp%2BFVjozh5QA=Bbw@mail.gmail.com>
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Ganbold Tsagaankhuu wrote: >Is there anyway to log file access in NFS client/server side? >I'm experiencing following problem: > >vm_fault: pager read error, pid 75363 (php-fpm) >ncl_getpages: error 70 > >and would like to know if there is possibility to find problematic files. I haven't used DTrace, so I can't help with that. However, "70" is ESTALE and that means that the file has been deleted on the server, so the client can't read it. Look for a case where an application running on another client (or locally on the server) would delete a file that would be accessed by php-fpm on this client. (If you know about when it happens, you could do a raw packet capture at the server using "tcpdump -s 0 -w find.pcap" and then look at the packet capture in wireshark, looking for where file(s) get removed. It won't be easy for a busy server.) rick
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