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Posted to issues@trafficserver.apache.org by "Leif Hedstrom (JIRA)" <ji...@apache.org> on 2010/08/24 05:46:16 UTC
[jira] Created: (TS-423) Increase default max number of outstanding
DNS requests
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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[jira] Updated: (TS-423) Increase default max number of outstanding
DNS requests
Posted by "Leif Hedstrom (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/TS-423?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Leif Hedstrom updated TS-423:
-----------------------------
Fix Version/s: 2.1.3
> 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
> Fix For: 2.1.3
>
>
> 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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[jira] Resolved: (TS-423) Increase default max number of
outstanding DNS requests
Posted by "Leif Hedstrom (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/TS-423?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Leif Hedstrom resolved TS-423.
------------------------------
Resolution: Fixed
> 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
> Assignee: Leif Hedstrom
> Priority: Minor
> Fix For: 2.1.3
>
>
> 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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[jira] Assigned: (TS-423) Increase default max number of
outstanding DNS requests
Posted by "Leif Hedstrom (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/TS-423?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Leif Hedstrom reassigned TS-423:
--------------------------------
Assignee: Leif Hedstrom
> 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
> Assignee: Leif Hedstrom
> Priority: Minor
> Fix For: 2.1.3
>
>
> 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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[jira] Commented: (TS-423) Increase default max number of
outstanding DNS requests
Posted by "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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[jira] Commented: (TS-423) Increase default max number of
outstanding DNS requests
Posted by "Leif Hedstrom (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/TS-423?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12903579#action_12903579 ]
Leif Hedstrom commented on TS-423:
----------------------------------
I'm going to increase this to 2048 I think. Here's my thinking, the default is way too small. and we need something somewhat reasonable. 2048 in-flight DNS requests could equate to maybe 4 - 8k QPS or so, which we really should be able to handle. If the resolvers can't handle that sort of load, they really ought to increase their resolver capacity.
Anyone against?
> 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
> Assignee: Leif Hedstrom
> Priority: Minor
> Fix For: 2.1.3
>
>
> 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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