redpanda/application: init workspace for async_stream_zstd

src/v/redpanda/application.cc

@@ -30,6 +30,8 @@
 #include "cluster/topics_frontend.h"
 #include "cluster/tx_gateway.h"
 #include "cluster/tx_gateway_frontend.h"
+#include "compression/async_stream_zstd.h"
+#include "compression/stream_zstd.h"
 #include "config/configuration.h"
 #include "config/endpoint_tls_config.h"
 #include "config/node_config.h"
@@ -275,6 +277,15 @@ void application::initialize(
           config::shard_local_cfg().zstd_decompress_workspace_bytes());
     }).get0();
 
+    /*
+     * allocate per-core workspaces for async_stream_zstd. it can be several
+     * megabytes in size, so do it before memory becomes fragmented.
+     */
+    ss::smp::invoke_on_all([] {
+        compression::async_stream_zstd::init_workspace(
+          config::shard_local_cfg().zstd_decompress_workspace_bytes());
+    }).get0();
+
     if (config::shard_local_cfg().enable_pid_file()) {
         syschecks::pidfile_create(config::node().pidfile_path());
     }