Optimizing Zimbra Server Cpu Wait Time
October 31, 2020
CPU stat illustration Yesterday, I was complained about our mail server’s performance. At first, I checked the disk space and everything’s OK. From server statistics, I found that the processed messages (sending and receiving) was about a hundred per minute. Then I checked the load of the server using top command, and the result showed that the CPU wa percentage was quite high, about 30 to 60 %. Based on some references on the internet, it mainly was caused by amavisd service which is doing read and write operation from and to disk.