set -e

# git reset --hard; git clean -dfx >/dev/null

git restore src/backend/postmaster/bgwriter.c
patch -p1 << EOF
--- a/src/backend/postmaster/bgwriter.c
+++ b/src/backend/postmaster/bgwriter.c
@@ -69,3 +69,3 @@ int			BgWriterDelay = 200;
  */
-#define LOG_SNAPSHOT_INTERVAL_MS 15000
+#define LOG_SNAPSHOT_INTERVAL_MS 1
 
@@ -307,3 +307,3 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 					   WL_LATCH_SET | WL_TIMEOUT | WL_EXIT_ON_PM_DEATH,
-					   BgWriterDelay /* ms */ , WAIT_EVENT_BGWRITER_MAIN);
+					   1 /* ms */ , WAIT_EVENT_BGWRITER_MAIN);
 
@@ -340,3 +340,2 @@ BackgroundWriterMain(const void *startup_data, size_t startup_data_len)
 
-		prev_hibernate = can_hibernate;
 	}
EOF

CFLAGS="-DWAL_DEBUG" ./configure -q --enable-debug --enable-cassert --enable-tap-tests --enable-injection-points
make -s -j8
PROVE_TESTS="t/009*" make -s check -C src/test/recovery
for i in {1..40}; do
  cp -r src/test/recovery/ src/test/recovery_$i/;
  sed "s|src/test/recovery|src/test/recovery_$i|" -i src/test/recovery_$i/Makefile;
done

echo "wal_debug = on
" >/tmp/temp.config

for i in {1..100}; do
  echo "ITERATION $i";
  parallel --halt now,fail=1 -j40 --linebuffer --tag TEMP_CONFIG=/tmp/temp.config PROVE_TESTS="t/009*" NO_TEMP_INSTALL=1 timeout 60 make check -s -C src/test/recovery_{} ::: `seq 20` || break;
done