500D memory increase suddenly

[chwuaa]

Hi, 

I have 500D with Firmware Version v5.2.13,build762 (GA)

It operate with memory usage 40%.

Yesterday, it suddenly increase memory usage to 9X%,

And all sessions force to disconnected.(40K sessions) 

But after 5 minute, it recover automatically.

I have log server,

But it didn't catch any log in that 5 minute.(But other time log has been stored)

How can I find the root cause in the remaining log?

Thank you!

Jason

[go2fast]

You really should update your firmware on that 500D. We were having MAJOR memory issues on both of our units running 5.2, especially if local disk logging was enabled. Upgraded to 5.4.7 and We never went above 34% and cpu usage also heavily decreased. Just upgraded to 6.0.5 and saw even better/lower CPU usage.