[jira] Commented: (TS-423) Increase default max number of outstanding DNS requests

["Leif Hedstrom (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/TS-423?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12901719#action_12901719 ] 

Leif Hedstrom commented on TS-423:
----------------------------------

Oh, forgot, relevant places to change code:

iocore/dns/P_DNSProcessor.h: #define MAX_DNS_IN_FLIGHT                   60

proxy/mgmt2/RecordsConfig.cc:   {CONFIG, "proxy.config.dns.max_dns_in_flight", "", INK_INT, "60", RU_REREAD, RR_NULL, RC_NULL, NULL, RA_NULL}

> Increase default max number of outstanding DNS requests
> -------------------------------------------------------
>
>                 Key: TS-423
>                 URL: https://issues.apache.org/jira/browse/TS-423
>             Project: Traffic Server
>          Issue Type: Improvement
>            Reporter: Leif Hedstrom
>            Priority: Minor
>
> Currently, the default for max number of DNS request in-flight is 60. This seems awfully small, particularly for a forward proxy. What if we increase this to maybe 512, or some other large'ish number? What is a reasonable, default "upper" limit? I assume this setting is there to not kill the external resolver.

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