[Tickets #13761] Re: Memory usage issues when IMAP sequence range is far apart

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Ticket URL: https://bugs.horde.org/ticket/13761
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  Ticket             | 13761
  Updated By         | Michael Slusarz <slusarz at horde.org>
  Summary            | Memory usage issues when IMAP sequence range is far
                     | apart
  Queue              | IMP
  Version            | 6.2.4
  Type               | Bug
  State              | Feedback
  Priority           | 1. Low
  Milestone          |
  Patch              |
  Owners             | Michael Slusarz
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Michael Slusarz <slusarz at horde.org> (2014-12-22 17:00) wrote:

> The problem seems that as the user has left some messages from a few  
> years back in that folder then the min/max sequence ID are very far  
> apart which causes the issue.

This makes no sense.  Memory is allocated per *message*.  It is  
irrelevant the gap between any two messages.

I can create an array of 10,000 IDs with a gap of 1000 between each ID  
- I see total memory usage of about 6 MB.  (100,000 IDs causes memory  
usage of ~40MB. 1,000,000 IDs causes memory usage of ~300MB).

You will need to provide a reproducible test case where 3000 IDs is  
causing memory usage of > 256 MB - I can't even get 1% of that memory  
usage.