<DIV>When there is plenty of&nbsp; messages in the queues, the memory would be over a&nbsp;high_watermark that is&nbsp;1/4 physical memory by default. after write some message to disk, the memory will below the&nbsp;high_watermark.</DIV>
<DIV>&nbsp;but i found that,&nbsp;after&nbsp;it's over the hig_watermark&nbsp;some times, the rabbitmq do nothing though the memory is over the high_watermark. then i can't send any message to rabbitmq. why the message aren't written to disk?</DIV>
<DIV>&nbsp;</DIV>
<DIV>this is a&nbsp;tail of log<BR>=INFO REPORT==== 16-Jun-2011::17:24:08 ===<BR>vm_memory_high_watermark clear. Memory used:429337976 allowed:429496729</DIV>
<DIV>=INFO REPORT==== 16-Jun-2011::17:24:08 ===<BR>&nbsp;&nbsp;&nbsp; alarm_handler: {clear,{vm_memory_high_watermark,node1@test01}}</DIV>
<DIV>=INFO REPORT==== 16-Jun-2011::17:24:09 ===<BR>vm_memory_high_watermark set. Memory used:438883816 allowed:429496729</DIV>
<DIV>=INFO REPORT==== 16-Jun-2011::17:24:09 ===<BR>&nbsp;&nbsp;&nbsp; alarm_handler: {set,{{vm_memory_high_watermark,node1@test01},[]}}</DIV>
<DIV>=INFO REPORT==== 16-Jun-2011::17:24:58 ===<BR>vm_memory_high_watermark clear. Memory used:421535520 allowed:429496729</DIV>
<DIV>=INFO REPORT==== 16-Jun-2011::17:24:58 ===<BR>&nbsp;&nbsp;&nbsp; alarm_handler: {clear,{vm_memory_high_watermark,node1@test01}}</DIV>
<DIV>=INFO REPORT==== 16-Jun-2011::17:24:59 ===<BR>vm_memory_high_watermark set. Memory used:430383912 allowed:429496729</DIV>
<DIV>=INFO REPORT==== 16-Jun-2011::17:24:59 ===<BR>&nbsp;&nbsp;&nbsp; alarm_handler: {set,{{vm_memory_high_watermark,node1@test01},[]}}</DIV>
<DIV>=INFO REPORT==== 16-Jun-2011::17:25:02 ===<BR>vm_memory_high_watermark clear. Memory used:428755056 allowed:429496729</DIV>
<DIV>=INFO REPORT==== 16-Jun-2011::17:25:02 ===<BR>&nbsp;&nbsp;&nbsp; alarm_handler: {clear,{vm_memory_high_watermark,node1@test01}}</DIV>
<DIV>=INFO REPORT==== 16-Jun-2011::17:25:03 ===<BR>vm_memory_high_watermark set. Memory used:433435224 allowed:429496729</DIV>
<DIV>=INFO REPORT==== 16-Jun-2011::17:25:03 ===<BR>&nbsp;&nbsp;&nbsp; alarm_handler: {set,{{vm_memory_high_watermark,node1@test01},[]}}</DIV>
<DIV>=INFO REPORT==== 16-Jun-2011::17:25:51 ===<BR>vm_memory_high_watermark clear. Memory used:428601928 allowed:429496729</DIV>
<DIV>=INFO REPORT==== 16-Jun-2011::17:25:51 ===<BR>&nbsp;&nbsp;&nbsp; alarm_handler: {clear,{vm_memory_high_watermark,node1@test01}}</DIV>
<DIV>=INFO REPORT==== 16-Jun-2011::17:25:52 ===<BR>vm_memory_high_watermark set. Memory used:436017336 allowed:429496729</DIV>
<DIV>=INFO REPORT==== 16-Jun-2011::17:25:52 ===<BR>&nbsp;&nbsp;&nbsp; alarm_handler: {set,{{vm_memory_high_watermark,node1@test01},[]}}</DIV>