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https://issues.apache.org/jira/browse/TS-1822?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13830714#comment-13830714
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Leif Hedstrom commented on TS-1822:
-----------------------------------

Then what does it do? It's unclear to me now what exactly it does 
("simultaneously" ?)  Is it possible that this changed in behavior since ~2007 ?

{code}
       M_MMAP_MAX
              This parameter specifies the maximum number of allocation 
requests that may be simultaneously  serviced
              using mmap(2).  This parameter exists because some systems have a 
limited number of internal tables for
              use by mmap(2), and using more than a few of them may degrade 
performance.

              The default value is 65,536, a value which has no special 
significance and  which  servers  only  as  a
              safeguard.   Setting  this  parameter  to  0 disables the use of 
mmap(2) for servicing large allocation
              requests.
{code}


> Do we still need proxy.config.system.mmap_max ?
> -----------------------------------------------
>
>                 Key: TS-1822
>                 URL: https://issues.apache.org/jira/browse/TS-1822
>             Project: Traffic Server
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Leif Hedstrom
>            Assignee: James Peach
>             Fix For: 6.0.0
>
>
> A long time ago, we added proxy.config.system.mmap_max to let the 
> traffic_server increase the max number of mmap segments that we want to use. 
> We currently set this to 2MM.
> I'm wondering, do we really need this still ?



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