oplog memory usage reduction (#482)

- Improvement: For projectstore oplog GET operation, only read basic information and release it if the oplog is not already open to reduce memory usage when listing oplogs in web UI
- Improvement: Reduce memory usage for oplog Op address lookup

Refactored Oplog::EState -> Oplog ::EMode and make sure we open data files in read-only mode when EMode::kBasicReadOnly is used.

1 files changed, 1 insertions, 3 deletions

diff --git a/src/zenserver/projectstore/httpprojectstore.cpp b/src/zenserver/projectstore/httpprojectstore.cpp
index cb12d7ce9..feeec3e37 100644
--- a/src/zenserver/projectstore/httpprojectstore.cpp
+++ b/src/zenserver/projectstore/httpprojectstore.cpp
@@ -1483,7 +1483,7 @@ HttpProjectService::HandleOpLogRequest(HttpRouterRequest& Req)
 	{
 		case HttpVerb::kGet:
 			{
-				Ref<ProjectStore::Oplog> OplogIt = Project->OpenOplog(OplogId, /*AllowCompact*/ true, /*VerifyPathOnDisk*/ true);
+				Ref<ProjectStore::Oplog> OplogIt = Project->ReadOplog(OplogId);
 				if (!OplogIt)
 				{
 					return HttpReq.WriteResponse(HttpResponseCode::NotFound,
@@ -1491,8 +1491,6 @@ HttpProjectService::HandleOpLogRequest(HttpRouterRequest& Req)
 												 fmt::format("oplog {} not found in project {}", OplogId, ProjectId));
 				}
 
-				Project->TouchOplog(OplogId);
-
 				ProjectStore::Oplog& Log = *OplogIt;
 
 				CbObjectWriter Cb;