Thanks for the reply I will trie to make a merge of both suggestions :)
--
Bruno Matos
Michael Garski wrote:
Digy's patch will address the memory leakage in the field cache, but even
though the garbage collector will now free the memory associated with the sort
values, you may still end up with memory issues due to how the .NET runtime
manages memory.
For example, if you have an index with 250,000 items in it and perform queries on it
using a sort based integer value on one of the fields. The field cache will create an
array of 250,000 integers to provide for fast access to the sort values. As the array
is a large object (> 85,000 bytes) it will be allocated on the large object heap
(LOH). While during a garbage collection memory is freed from the LOH, the LOH is not
compacted like generations 0, 1, & 2. If your application swaps over indexes
without restarting, such as in a Windows Service, the LOH could become fragmented over
time. This fragmentation can lead to an OutOfMemoryException as the runtime is not
able to allocate a contiguous chunk of memory for the array.
There is a good MSDN article on the LOH and how to use windbg to peek at what's
in the managed heap: http://msdn.microsoft.com/en-us/magazine/cc534993.aspx
Michael
-----Original Message-----
From: Digy [mailto:[EMAIL PROTECTED]
Sent: Wednesday, October 15, 2008 2:41 PM
To: [email protected]
Subject: RE: Search with Sort
Yes, there is a MemoryLeakage-bug while searching+sorting in versions 2.1 &
2.3.1
and as far as I can reproduce the bug, I prepared two patches
("WeakHashTable+FieldCacheImpl.rar" for v2.1 and "Paches for v2.3.1.rar" for
v2.3.1 (https://issues.apache.org/jira/browse/LUCENENET-106) ).
Although there are still many complains about this issue, there isn't(or I
don't have) any test case to track it down.
DIGY.
-----Original Message-----
From: Bruno Matos [mailto:[EMAIL PROTECTED]
Sent: Wednesday, October 15, 2008 8:34 PM
To: [email protected]
Subject: Search with Sort
Hello,
I'm with a problem with memory when I use a Sort. Can anyone help me
with this?
I sow a lot of people posting about this, but I didn't sow any answers.
Thank you.
