[ZBX-3772] Problem of history cache Created: 2011 May 02  Updated: 2017 May 30  Resolved: 2011 May 04

Status: Closed
Project: ZABBIX BUGS AND ISSUES
Component/s: Server (S)
Affects Version/s: 1.8.5, 1.9.3 (alpha)
Fix Version/s: 1.8.6, 1.9.4 (alpha)

Type: Incident report Priority: Critical
Reporter: Alexander Vladishev Assignee: Unassigned
Resolution: Fixed Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Issue Links:
Duplicate
is duplicated by ZBX-3603 history syncer does not perform well ... Closed

 Description   

Problem of history cache

I think that there is a problem at history cache when the ZABBIX server observes the log.

The log of 700Line/Sec enters History_text_cache, and sync is done correctly when it is normal.
As for pfree of History_text_cache at that time, 80-90% changes, and is normal.

However, movement becomes illegal when becoming the following afterwards.

1.The log in profusion (1200Line/sec) is output and History_text_cache becomes Full.
2.The output of the log decreases. (300Line/sec)
3.Pfree of History_text_cache doesn't increase from 0.001 to 2%.

Originally, I think that it is necessary to be updated from Cache to DB at the speed of 700Line/sec that the watch is possible.
However, it is updated at the speed of from 20 to 200Line/sec.

Under such a condition, there is a problem of not returning to the origin when one degree History_text_cache becomes Full.



 Comments   
Comment by Alexander Vladishev [ 2011 May 03 ]

Fixed in the development branch svn://svn.zabbix.com/branches/dev/ZBX-3772

Comment by Alexander Vladishev [ 2011 May 04 ]

Available in version pre1.8.6, r19347

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