[Oskari-user] Oskari's performance and java processes

[Ryyppö, Minna]

Hello dear Oskari-users,

At Finnish Heritage Agency we have had occasionally some problems with our Oskari application's performance. At the server, that can be seen as bigger CPU load than normally. Top processes command gives a list like that:

  PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND
1546 jetty     20   0 15.534g 5.375g  16544 S 123.9 69.0  26019:00 java
  992 ----     20   0 1158860 674672   2648 S   0.3  8.3 644:39.14 ----
12753 ----   20   0  396852  86396  78048 S   0.3  1.1   4:20.40 ---
    1 ---      20   0   38160   4548   2588 S   0.0  0.1   0:09.68 ---
    2 ----      20   0       0      0      0 S   0.0  0.0   0:00.19 ----
    3 ----      20   0       0      0      0 S   0.0  0.0   0:13.08 ----

So it looks like there is a java process by jetty which takes more of cpu than there is available. When this process starts, the application is unable to work properly.
My question is, has anyone else ever encountered similar situation? Or has any idea whether this kind of java-process is normal with Oskari? Or, what that process might do when it is taking so much processor power?

I know that this is difficult to answer, but I'm just hoping that someone has had the same situation somewhere and could maybe give some good tips to solve this annoying problem... :)

regards,

Minna Ryyppö
Geoinformation Specialist
Archives and Information Services
Finnish Heritage Agency
PL 913, 00101 Helsinki
p. 0295 33 6253
minna.ryyppo at museovirasto.fi<mailto:minna.ryyppo at museovirasto.fi>

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