I have upgraded the kernel on a client node (one that has close-to-zero
traffic) used for tests.
{
"reconnecting" : false,
"id" : 1620266,
"num_leases" : 0,
"inst" : "client.1620266 10.0.0.111:0/3921220890",
"state" : "open",
"completed_requests" : 0,
"num_caps" : 1402490,
"client_metadata" : {
"kernel_version" : "4.4.0-104-generic",
"hostname" : "suppressed",
"entity_id" : "admin"
},
"replay_requests" : 0
},
still 1.4M caps used.
is upgrading the client kernel enough ?
Regards,
Webert Lima
DevOps Engineer at MAV Tecnologia
*Belo Horizonte - Brasil*
*IRC NICK - WebertRLZ*
On Fri, Dec 15, 2017 at 11:16 AM, Webert de Souza Lima <
[email protected]> wrote:
> So,
>
> On Fri, Dec 15, 2017 at 10:58 AM, Yan, Zheng <[email protected]> wrote:
>
>>
>> 300k are ready quite a lot. opening them requires long time. does you
>> mail server really open so many files?
>
>
> Yes, probably. It's a commercial solution. A few thousand domains, dozens
> of thousands of users and god knows how any mailboxes.
> From the daemonperf you can see the write workload is high, so yes, too
> much files opening (dovecot mdbox stores multiple e-mails per file, split
> into many files).
>
> I checked 4.4 kernel, it includes the code that trim cache when mds
>> recovers.
>
>
> Ok, all nodes are running 4.4.0-75-generic. The fix might have been
> included in a newer version.
> I'll upgrade it asap.
>
>
> Regards,
>
> Webert Lima
> DevOps Engineer at MAV Tecnologia
> *Belo Horizonte - Brasil*
> *IRC NICK - WebertRLZ*
>
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