[xml] query on xmlSetDocCompressMode

["Senthil Nathan" <rsennat gmail com>]

Hi All,

I have been using libxml for a while and recently came up with a memory usage problem for the xmlDocPtr.

 

So, tried using the compression as,

    xmlSetDocCompressMode(m_domTree, 9);

 

But looks like there is no change in the memory usage.

 

Also following is the way, how did I check the memory usage of the process which was having the xmlDocPtr in memory.

(wheel)# ps -auxww 93274
USER   PID %CPU %MEM   VSZ   RSS  TT  STAT STARTED      TIME COMMAND
root      93274  0.0      1.3    16088 13192  p1  S+    1:21PM   0:00.09 ./clid -d 1
(wheel)#
 

Then I added few nodes to the xml file as follows, from which I built the xmlDocPtr.

Also set the compression mode as 9.

 

        <test21>
                <nodeType hide="1">static</nodeType>
                <description hide="1">test description</description>
        </test21>
 

Then I checked the memory usage, which showed that it increased by 4KB.

Just for the 4 set of nodes as above, it increased by 4KB.

 

(wheel)# ps -auxww 93274
USER   PID %CPU %MEM   VSZ   RSS  TT  STAT STARTED      TIME COMMAND
root    93274   0.0      1.3     16092 13196  p1  S+    1:21PM   0:00.09 ./clid -d 1
(wheel)#

 

So, I would like to know, how could we optimize the memory usage of xmlDocPtr in libxml.

Because, the xml files I would be using would increase in size hugely for which I need

to optimize the memory usage of the xmlDocPtr.

 

Please give your suggestions.

 

Thanks

Senthil Nathan R