Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it’s on-topic for Server Fault. Closed 5 years ago. Improve this question I am having a problem with High CPU happening on my my website in IIS8. This happens randomly and not very often but … Read more
Closed. This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 4 years ago. Improve this question I have a LAMP server. Users log in and authenticate against the MySQL database. After successful authentication, session_start() is called. … Read more
I’m having an odd problem: my garbage collection log file (as defined by -Xloggc) will show n number of garbage collections have taken place, but jconsole will show n+6 garbage collections have taken place. I’m using the ConcurrentMarkSweep (aka CMS) metric to measure this. For example, I see 230 examples of “CMS-concurrent-sweep-start” in the log … Read more
What is the issue? After upgrading instances to Ubuntu 16.04 LTS and OpenJDK 8 the GC frequency can, after hours of normal operation, suddenly increase by orders of magnitude ending up using less than 10% of the HEAP. We have analyzed the GC logs and can find nothing strange except the frequency increase. Even gceasy.io … Read more
We upgraded from Ubuntu 16LTS to Ubuntu 18LTS a couple of days ago and since then have had Apache Tomcat crash completely twice (once per day, about 25 hrs apart). The java process stops running. One line is added to the log file at this point: free(): corrupted unsorted chunks (that’s it – no timestamp) … Read more
I am running a SolrCloud on k8s with the following setting: Heap params: -server -Xms280m -Xmx312m Other params: -XX:+UseParallelGC -XX:+UseParallelOldGC -XX:+UseAdaptiveSizePolicy -XX:ParallelGCThreads=4 -XX:AdaptiveSizePolicyOutputInterval=1 -XX:MinHeapFreeRatio=20 -XX:MaxHeapFreeRatio=40 -XX:MaxGCPauseMillis=300 -XX:GCTimeRatio=19 -XX:AdaptiveSizePolicyWeight=90 -XX:MaxMetaspaceSize=128m -XX:MaxMetaspaceFreeRatio=90 -XX:MetaspaceSize=96m -XX:+ParallelRefProcEnabled And the max heap shown on the admin page is only 277.5m, which is 34.5m less than Xmx And if I change the … Read more
Hi we are seeing an issue with our Cloudera setup. We have multiple data nodes and on each node we have phoenix set up to query on HBase tables. What we have observed is that when one of the region server is going through Garbage collection (GC cycle) it becomes unavailable. Due to this unavailability … Read more
Last week we updated several wordpress sites which are running Alpine Linux as containers inside a host (Ubuntu 20.04) through LXD. A summary of the update is as follows: Alpine Linux v3.8 -> 3.14 PHP 5.3.6 -> 7.4.24 Wordpress 5.0.3 -> 5.7.3 Problem We started having issues with the server performance after those updates and … Read more
There is a frequent occurence of FULL GC in our system. We are using Java application running on Tomcat server. Our application is running using internal load balancer setup. We are seeing lot of Full GC’s in the server logs due to which the application is hung and Proxy errors are occured. The Java parameter … Read more
It is Window 2003 server. We are running some performance test, and what we see is: 1. In first 5 hours, the page fault/sec is very small, like 10 or 20 In the last 1 hour, the page fault jumps to 500 page fault/sec In the last 1 hour, we see the java server will … Read more
