MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 11/11/00 through 11/17/00
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 53,163 2,556,329
MED90 11,404 178,510
MED85 8,931 74,247
MED80 8,056 30,357
MED75 7,544 23,896
MED66 7,714 27,146
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 2,414 46,106
2-4 a.m. 590 10,027
4-6 a.m. 276 8,853
6-8 a.m. 1,220 35,803
8-10 a.m. 7,137 216,465
10-12 a.m. 15,572 480,708
12-2 p.m. 16,743 522,363
2-4 p.m. 20,686 601,409
4-6 p.m. 14,918 451,488
6-8 p.m. 8,464 244,120
8-10 p.m. 5,721 169,819
10-12 p.m. 3,071 103,324
__________ _____________ _________________
Total: 96,812 2,890,485
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 163
Davis 1,255
Irvine 97
Los Angeles 781
Riverside 89
San Diego 601
San Francisco 1,191
Santa Barbara 22
Santa Cruz 6
Lawrence Berkeley 24
Lawrence Livermore 11
Los Alamos 0
MELWEB 74,541
Searchlight 17,196
Other - UC 137
Other-Network UC 698
_____
96,812
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 2,082
Davis 8,494
Irvine 768
Los Angeles 6,702
Riverside 522
San Diego 4,950
San Francisco 13,490
Santa Barbara 98
Santa Cruz 243
Lawrence Berkeley 178
Lawrence Livermore 550
Los Alamos 0
MELWEB 2,841,198
Searchlight 3,802
Other - UC 1,977
Other-Network UC 5,431
_____
2,890,485
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 1.0
Standard deviation in seconds 3.4
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.5
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 20:43
Average session length (minutes:seconds) 16:55
Longest session recorded (minutes:seconds) 259:19
Average number of searches completed per session 0.0
Retrievals per search - median 2.0
Retrievals per search - average 430.4
Retrievals per search - standard deviation 5714.8
Percent of searches completed with 0 results 35.8%
Percent of searches entered that are long 0.0%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
SEARCH 96,812 14.8%
PRESENT 512,040 78.2%
INIT or CLOSE 45,542 7.0%
OTHER 402 0.1%
SEARCHes completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. SEARCHes No. Index Median Avg. Dev.
______ _________ ______ _______ ______ __________ _______
By index:
JOURNAL 6,111 4.4% 2,648 43.3% 5 712.3 3315.4
PERSONAL AUTHOR 24,549 17.9% 7,174 29.2% 7 74.0 641.1
TITLE WORD 10,033 7.3% 3,939 39.3% 3 176.6 1529.9
SUBSET 275 0.2% 78 28.4% 26 185.4 457.2
SUBJECT WORD 102 0.1% 45 44.1% 24 1265.1 5896.9
SUBJECT 3,271 2.4% 1,774 54.2% 16 665.9 5826.3
EXACT SUBJECT 5,871 4.3% 1,546 26.3% 35 476.0 3030.6
MAJOR SUBJECT 244 0.2% 140 57.4% 23 449.4 1947.4
EXACT MAJOR SUBJ 648 0.5% 186 28.7% 24 360.4 1820.4
EXACT TITLE 953 0.7% 607 63.7% 1 37.4 436.6
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,459 1.1% 452 31.0% 473 1719.3 3435.4
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 20 0.0% 4 20.0% 40 36.3 24.1
KEYWORD 60,812 44.3% 22,813 37.5% 17 881.3 8901.1
DATE 1,755 1.3% 428 24.4% 7 159.7 1429.7
LANGUAGE 8,174 6.0% 2,501 30.6% 29 342.2 1830.3
UNIQUE ID 505 0.4% 48 9.5% 1 1.0 0.1
ADDED 1,172 0.9% 1,111 94.8% 3 13.5 29.5
PUB TYPE 3,114 2.3% 749 24.1% 30 202.4 1129.1
AUTHOR AFFIL. 757 0.6% 365 48.2% 8 99.9 670.7
CHEMICAL NAME 16 0.0% 7 43.8% 5 89.6 147.2
EXACT CHEMICAL 1 0.0% 1 100% 0 0.0 0.0
AT 6,674 4.9% 2,279 34.1% 26 613.7 3640.5
AGE 341 0.2% 92 27.0% 15 131.6 460.7
ISN 0 0.0% 0 0.0% 0 0.0 0.0
ARTICLE 241 0.2% 70 29.0% 35 784.2 4935.0
XXS 168 0.1% 102 60.7% 9 593.6 3983.6
XMXS 75 0.1% 31 41.3% 22 51.6 86.4
XS 2 0 0.0% 0 0.0% 0 0.0 0.0
MXS 2 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 9 0.0% 6 66.7% 4 5.7 4.7
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. SEARCHes No. Index Median Avg. Dev.
______ _________ ______ _______ ______ __________ _______
By number of indexes:
Multiple 26,626 27.5% 9,975 37.5% 9 278.3 2405.6
Single 70,186 72.5% 24,684 35.2% 16 814.0 8189.8
PRESENT commands, by type:
MARC 30.9%
OPAC 30.8%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS