Hi Ryan, Do you mean these settings, or other settings?
<SlicedBufferSizeInKB>64</SlicedBufferSizeInKB> <FlushDataBufferSizeInMB>32</FlushDataBufferSizeInMB> <FlushIndexBufferSizeInMB>8</FlushIndexBufferSizeInMB> <ColumnIndexSizeInKB>64</ColumnIndexSizeInKB> <MemtableThroughputInMB>64</MemtableThroughputInMB> <BinaryMemtableThroughputInMB>256</BinaryMemtableThroughputInMB> <MemtableOperationsInMillions>0.3</MemtableOperationsInMillions> <MemtableFlushAfterMinutes>60</MemtableFlushAfterMinutes> Thanks! Kyusik Chung On Apr 28, 2010, at 12:28 PM, Ryan King wrote: > On Wed, Apr 28, 2010 at 12:12 PM, Kyusik Chung <kyu...@discovereads.com> > wrote: >> Hello. I am using Cassandra 0.6.1 on ubuntu 8.04. 3 node cluster. >> >> I notice that when I start making lots of read requests (serially), memory >> usage of jsvc keeps climbing until it uses up all memory on the server >> (happens for all 3 servers in the cluster). At that point, the box starts >> swapping a little (but not too much) and performance is degraded. Read >> performance does not drop off a cliff, but it does take a serious hit (maybe >> 50%). >> >> I have tried setting Xmx to various different values, but it doesnt seem to >> limit the growth in memory usage. I understand that I should expect to see >> jsvc use a bit more memory than what the jvm is configured to use, but it >> doesnt seem to be limited to just an overhead. I have set Xmx all the way >> down to 128M (just to test) and still jsvc will use up 2G of memory. >> >> Are there other settings that I should be changing? >> >> Note that when I test by simply running a lot of writes but no reads, jsvc >> seems to respect the Xmx value. > > What are you cache settings? > > -ryan
