Function aofUpdateCurrentSize

app/redis-6.2.6/src/aof.c:1834–1847

Update the server.aof_current_size field explicitly using stat(2) * to check the size of the file. This is useful after a rewrite or after * a restart, normally the size is updated just adding the write length * to the current length, that is much faster. */

 * a restart, normally the size is updated just adding the write length
 * to the current length, that is much faster. */
void aofUpdateCurrentSize(void) {
    struct redis_stat sb;
    mstime_t latency;

    latencyStartMonitor(latency);
    if (redis_fstat(server.aof_fd,&sb) == -1) {
        serverLog(LL_WARNING,"Unable to obtain the AOF file length. stat: %s",
            strerror(errno));
    } else {
        server.aof_current_size = sb.st_size;
    }
    latencyEndMonitor(latency);
    latencyAddSampleIfNeeded("aof-fstat",latency);
}

/* A background append only file rewriting (BGREWRITEAOF) terminated its work.
 * Handle this. */