MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 06/30/01 through 07/06/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 33,623 1,804,248
MED90 6,748 128,915
MED85 5,064 45,847
MED80 4,517 24,022
MED75 4,103 16,483
MED66 4,162 12,295
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,799 50,130
2-4 a.m. 617 24,319
4-6 a.m. 202 8,177
6-8 a.m. 808 38,427
8-10 a.m. 5,184 178,762
10-12 a.m. 10,730 395,310
12-2 p.m. 10,404 340,271
2-4 p.m. 12,197 419,707
4-6 p.m. 9,159 316,104
6-8 p.m. 3,534 128,041
8-10 p.m. 1,969 71,254
10-12 p.m. 1,614 61,308
__________ _____________ _________________
Total: 58,217 2,031,810
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 511
Davis 479
Irvine 28
Los Angeles 875
Riverside 4
San Diego 379
San Francisco 1,101
Santa Barbara 4
Santa Cruz 8
Lawrence Berkeley 19
Lawrence Livermore 2
Los Alamos 8
MELWEB 84
Searchlight 4,792
Other - UC 49,484
Other-Network UC 439
_____
58,217
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 5,470
Davis 4,735
Irvine 2,123
Los Angeles 16,232
Riverside 0
San Diego 18,424
San Francisco 12,138
Santa Barbara 9
Santa Cruz 177
Lawrence Berkeley 454
Lawrence Livermore 15
Los Alamos 17
MELWEB 0
Searchlight 0
Other - UC 1,969,592
Other-Network UC 2,424
_____
2,031,810
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.8
Standard deviation in seconds 2.8
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.3
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:20
Average session length (minutes:seconds) 19:25
Longest session recorded (minutes:seconds) 292:36
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 337.8
Retrievals per search - standard deviation 4135.5
Percent of searches completed with 0 results 33.7%
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 58,217 12.5%
PRESENT 383,437 82.1%
INIT or CLOSE 25,076 5.4%
OTHER 369 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 3,608 4.5% 1,402 38.9% 5 779.6 3570.7
PERSONAL AUTHOR 17,819 22.0% 5,271 29.6% 8 95.4 1161.1
TITLE WORD 7,447 9.2% 2,766 37.1% 3 128.0 1277.9
SUBSET 102 0.1% 14 13.7% 17 183.5 1228.4
SUBJECT WORD 136 0.2% 42 30.9% 17 660.6 2886.6
SUBJECT 1,494 1.8% 733 49.1% 15 535.0 3036.2
EXACT SUBJECT 2,986 3.7% 757 25.4% 21 567.7 4549.3
MAJOR SUBJECT 106 0.1% 41 38.7% 9 72.7 225.2
EXACT MAJOR SUBJ 356 0.4% 76 21.3% 17 210.6 597.9
EXACT TITLE 654 0.8% 411 62.8% 1 23.7 174.1
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 927 1.1% 294 31.7% 285 1588.1 3731.0
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 32 0.0% 21 65.6% 4 195.4 606.5
KEYWORD 33,198 41.0% 11,694 35.2% 15 683.1 6539.4
DATE 1,522 1.9% 334 21.9% 7 270.7 1800.4
LANGUAGE 3,923 4.8% 1,014 25.8% 23 294.3 2356.6
UNIQUE ID 108 0.1% 41 38.0% 1 1.1 0.4
ADDED 1,162 1.4% 486 41.8% 5 32.2 351.6
PUB TYPE 2,106 2.6% 591 28.1% 22 156.9 605.4
AUTHOR AFFIL. 523 0.6% 238 45.5% 10 178.7 1123.8
CHEMICAL NAME 6 0.0% 2 33.3% 2 6.8 10.8
EXACT CHEMICAL 1 0.0% 1 100% 0 0.0 0.0
AT 2,211 2.7% 759 34.3% 15 535.4 4245.0
AGE 188 0.2% 30 16.0% 23 177.7 385.7
ISN 1 0.0% 1 100% 0 0.0 0.0
ARTICLE 83 0.1% 20 24.1% 25 137.8 353.1
XXS 136 0.2% 56 41.2% 9 74.2 322.7
XMXS 64 0.1% 28 43.8% 12 86.1 329.8
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 19 0.0% 16 84.2% 772 517.7 440.5
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 16,148 27.7% 5,627 34.8% 7 230.0 2247.8
Single 42,069 72.3% 13,980 33.2% 15 614.0 5778.8
PRESENT commands, by type:
MARC 32.9%
OPAC 29.6%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS