add comments to example

examples/stats_logging/stats_server.kg

@@ -25,18 +25,23 @@ statsT:::[:_(tbs?"stats");.table(colsFromNames(cols));tbs?"stats"]
 :" Create a database so we can inspect the data "
 db::.db(:{},"stats",,statsT)
 
+:" Reading from the db will cause buffered inserts to flush into the underlying table "
 syncDb::{db("select 1 from stats")}
+
+:" Read and print the table size "
 tableSize::{[q];q::db("select count(*) from stats");.d("rows: ");.p(q);q}
 tableSize()
 
+:" Periodically report write stats "
 lastTime::.pc()
 lastSize::0
 batchSize::0
-writeStats::{[n];n::.pc();.d("writes/sec: ");.p((batchSize-lastSize)%(n-lastTime));lastTime::n;lastSize::batchSize}
+writeStats::{[n];n::.pc();.d("writes/sec: ");.p((batchSize-lastSize)%(n-lastTime));lastTime::n;lastSize::batchSize;1}
 .timer("write stats";60;writeStats)
 
+:" Periodically flush the table to disk "
 flushTable::{tbs,"stats",statsT}
-store::{:[batchSize;flushTable();0];batchSize::0;1}
+store::{:[batchSize;flushTable();0];batchSize::0;lastSize::0;lastTime::.pc();1}
 timeStore::{[r];r::time0(store());.d("store ms: ");.p(r)}
 flush::{tableSize();timeStore();1}
 .timer("flush";300;flush)