Hi, Throttling is applied to page modifications [percentOfPartTime=0.62, markDirty=2440 pages/sec, checkpointWrite=1971 pages/sec, estIdealMarkDirty=0 pages/sec, curDirty=0.00, maxDirty=0.02, avgParkTime=253807 ns, pages: (total=132474, evicted=0, written=831, synced=0, cpBufUsed=543, cpBufTotal=259107)]
This means that your disk is not fast enough or your throughput is too high. see: https://apacheignite.readme.io/docs/durable-memory-tuning#pages-writes-throttling and : https://cwiki.apache.org/confluence/display/IGNITE/Ignite+Persistent+Store+-+under+the+hood#IgnitePersistentStore-underthehood-PagesWriteThrottling Here: percentOfPartTime=0.62 -- - writing threads are stuck in LockSupport.parkNanos() for 62% of the time, which is significant, Page replacements started, pages will be rotated with disk, this will affect storage performance (consider increasing DataRegionConfiguration#setMaxSize for data region) Here Ignite is using the disk as a swap space. Consider increasing the size of that particular memory region. SQL queries can be fully utilized from Ignite applications when only a subset of pages is in memory. In this case required pages will be taken from disk during query execution. If memory amount is less than whole size of B+tree for SQL index, Ignite still can operate. When Ignite runs out of RAM memory for the new pages allocation, some of the pages will be purged from RAM (as it can be loaded from disk later). see: https://cwiki.apache.org/confluence/display/IGNITE/Ignite+Durable+Memory+-+under+the+hood#IgniteDurableMemory-underthehood-Pagereplacement(rotationwithdisk) and: https://apacheignite.readme.io/docs/durable-memory-tuning Query execution is too long This is likely related to the above issues. Possible starvation in striped pool. Thread name: sys-stripe-1-#2 Queue: [Message closure [msg=GridIoMessage [plc=2, topic=TOPIC_CACHE, topicOrd=8, ordered=false, timeout=0, skipOnTimeout=false, This means that these threads are stuck. Possible causes are network issues, or very large objects. see: http://apache-ignite-users.70518.x6.nabble.com/Possible-starvation-in-striped-pool-td14892.html and: http://apache-ignite-users.70518.x6.nabble.com/Possible-starvation-in-striped-pool-message-td15993.html but I would likely fix the above issues -- page replacements, memory and come back to this later. Thanks, Alex -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/
