Re: High SYS CPU - need advise

Tom,

I just checked the version I'm running (9.1.6), and the code is quite
similar (src/backend/storage/lmgr/s_lock.c)

             pg_usleep(cur_delay * 1000L);

#if defined(S_LOCK_TEST)
             fprintf(stdout, "*");
             fflush(stdout);
#endif

             /* increase delay by a random fraction between 1X and 2X */
             cur_delay += (int) (cur_delay *
                       ((double) random() / (double) MAX_RANDOM_VALUE) +
0.5);
             /* wrap back to minimum delay when max is exceeded */
             if (cur_delay > MAX_DELAY_MSEC)
                 cur_delay = MIN_DELAY_MSEC;

-- vlad