Nurlan,
Try enabliing your checkpoint_segments. In my example, our database restore took 75mins. After enabling checkpoints_segments to 20, we cut it down to less than 30 minutes. Is your pg_xlog on a seperate disc..or at least a partition? This will help too. A checkpoints_segments of 20, if memory serves correctly, will occupy around 800-900M of disc space in pg_xlog.
Steve Poe
Nurlan Mukhanov (AL/EKZ) wrote:
Hello.
I'm trying to restore my database from dump in several parrallel processes, but restore process works too slow. Number of rows about 100 000 000, RAM: 8192M CPU: Ultra Sparc 3 Number of CPU: 4 OS: SunOS sun 5.8 RDBMS: PostgreSQL 8.0
==================== prstat info ====================
PID USERNAME SIZE RSS STATE PRI NICE TIME CPU PROCESS/NLWP 14231 postgres 41M 37M sleep 58 0 0:00.01 0.2% postgres/1 14136 postgres 41M 37M sleep 58 0 0:00.03 0.2% postgres/1 14211 postgres 41M 37M sleep 58 0 0:00.01 0.2% postgres/1 14270 postgres 41M 37M sleep 58 0 0:00.00 0.2% postgres/1 13767 postgres 41M 37M sleep 58 0 0:00.18 0.2% postgres/1 13684 postgres 41M 36M sleep 58 0 0:00.14 0.2% postgres/1
NPROC USERNAME SIZE RSS MEMORY TIME CPU 74 root 272M 191M 2.3% 0:26.29 24% 124 postgres 1520M 1306M 16% 0:03.05 5.0%
How to encrease postgresql speed? Why postgres took only 5.0% of CPU time?
Nurlan Mukhanov
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