Experimental Physics and
Industrial Control System

Hello Abdalla,

Thanks for your reply,  it is weird that I did not receive the email, so my colleague forwarded it to me.

< Have you reserved the same amount of heap memory for the JVM in your new installation? i.e., the JVM options –Xms (initial heap size) and –Xmx 

< (maximum heap size)? These are set per tomcat instance.

Yes, I reserved the same JVM heap memory configuration in sampleStartup.sh file as follows,

export JAVA_OPTS="-XX:MaxMetaspaceSize=256M -XX:+UseG1GC -Xmx8G -Xms8G -ea"

The reason that I archive high-frequency PVs with low archiving rate is to save the storage space at office network since the full data is already stored with full archiving rate in control network.

I will do more test and try to find the root cause in the next few days.

Regards,

Lin

-----原始邮件-----
发件人:"Abdalla Ahmad via Tech-talk" <tech-talk at aps.anl.gov>
发送时间:2023-02-14 15:08:25 (星期二)
收件人: "Wang, Lin" <wanglin at ihep.ac.cn>
抄送: "tech-talk at aps.anl.gov" <tech-talk at aps.anl.gov>
主题: RE: Archiver appliance sampling buffer overflows after migration from Version 2018 to Version 1.1.0

Hello Lin

 

Have you reserved the same amount of heap memory for the JVM in your new installation? i.e., the JVM options –Xms (initial heap size) and –Xmx (maximum heap size)? These are set per tomcat instance.

 

Best Regards,

Abdalla.

 

From: Tech-talk <tech-talk-bounces at aps.anl.gov> On Behalf Of Wang, Lin via Tech-talk
Sent: Tuesday, February 14, 2023 7:45 AM
To: tech-talk at aps.anl.gov
Subject: Archiver appliance sampling buffer overflows after migration from Version 2018 to Version 1.1.0

 

Dear all,

In the last several years, we used Archiver Appliance Version archappl_v0.0.1_SNAPSHOT_15-November-2018T10-27-25.tar.gz to arvhive PVs at CSNS office network.

 

Recently, we have upgrated Archiver Appliance to the latest Version 1.1.0 and preserve the existing MySQL database as well as archappl.properties.

 

However, with this latest version, some 25Hz high-frequency PVs with low archiving rate and SCAN archiving method cannot be archived continuously.

 

For example, the process frequency of PV A:B:C:D is 25Hz, the scan period is 1 second and the scan method is SCAN, the data can only be stored at the beginning of every 1 minute and then stop.

 

It seems that the sampling buffer overflows, but it did not happen for the old version. Did I miss something for the migration or is there anything changed in the latest version? Any suggestion is appreciated.

 

Regards,

Lin 

 

 

 

 

 

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